diff --git a/Libraries/Renderer/REVISION b/Libraries/Renderer/REVISION
index ac1bb7c7649eb7..cdf4b841f1a039 100644
--- a/Libraries/Renderer/REVISION
+++ b/Libraries/Renderer/REVISION
@@ -1 +1 @@
-cae635054e17a6f107a39d328649137b83f25972
\ No newline at end of file
+419cc9c3799bc296c3c2a2c93880826aca680886
\ No newline at end of file
diff --git a/Libraries/Renderer/implementations/ReactFabric-dev.fb.js b/Libraries/Renderer/implementations/ReactFabric-dev.fb.js
index 79d4f4b95b7bba..06a99f732fee1b 100644
--- a/Libraries/Renderer/implementations/ReactFabric-dev.fb.js
+++ b/Libraries/Renderer/implementations/ReactFabric-dev.fb.js
@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<45ddf77f62454702039adab715d6bb58>>
+ * @generated SignedSource<<7030f8cf60391b0a117fd83a00a5b3be>>
  */
 
 'use strict';
@@ -2945,7 +2945,7 @@ var MutationMask =
   Ref |
   Hydrating |
   Visibility;
-var LayoutMask = Update | Callback | Ref; // TODO: Split into PassiveMountMask and PassiveUnmountMask
+var LayoutMask = Update | Callback | Ref | Visibility; // TODO: Split into PassiveMountMask and PassiveUnmountMask
 
 var PassiveMask = Passive | ChildDeletion; // Union of tags that don't get reset on clones.
 // This allows certain concepts to persist without recalculting them,
@@ -3714,6 +3714,7 @@ function diff(prevProps, nextProps, validAttributes) {
 var batchedUpdatesImpl = function(fn, bookkeeping) {
   return fn(bookkeeping);
 };
+
 var isInsideEventHandler = false;
 function batchedUpdates(fn, bookkeeping) {
   if (isInsideEventHandler) {
@@ -3730,11 +3731,7 @@ function batchedUpdates(fn, bookkeeping) {
     isInsideEventHandler = false;
   }
 }
-function setBatchingImplementation(
-  _batchedUpdatesImpl,
-  _discreteUpdatesImpl,
-  _batchedEventUpdatesImpl
-) {
+function setBatchingImplementation(_batchedUpdatesImpl, _discreteUpdatesImpl) {
   batchedUpdatesImpl = _batchedUpdatesImpl;
 }
 
@@ -3917,9 +3914,15 @@ function injectInternals(internals) {
     {
       error("React instrumentation encountered an error: %s.", err);
     }
-  } // DevTools exists
+  }
 
-  return true;
+  if (hook.checkDCE) {
+    // This is the real DevTools.
+    return true;
+  } else {
+    // This is likely a hook installed by Fast Refresh runtime.
+    return false;
+  }
 }
 function onScheduleRoot(root, children) {
   {
@@ -5859,7 +5862,7 @@ var Passive$1 =
   /*   */
   4;
 
-var ReactVersion = "18.0.0-cae635054-20210626";
+var ReactVersion = "18.0.0-419cc9c37-20210726";
 
 var ReactCurrentBatchConfig = ReactSharedInternals.ReactCurrentBatchConfig;
 var NoTransition = 0;
@@ -9574,38 +9577,6 @@ function ChildReconciler(shouldTrackSideEffects) {
       if (typeof newChild === "function") {
         warnOnFunctionType(returnFiber);
       }
-    }
-
-    if (typeof newChild === "undefined" && !isUnkeyedTopLevelFragment) {
-      // If the new child is undefined, and the return fiber is a composite
-      // component, throw an error. If Fiber return types are disabled,
-      // we already threw above.
-      switch (returnFiber.tag) {
-        case ClassComponent: {
-          {
-            var instance = returnFiber.stateNode;
-
-            if (instance.render._isMockFunction) {
-              // We allow auto-mocks to proceed as if they're returning null.
-              break;
-            }
-          }
-        }
-        // Intentionally fall through to the next case, which handles both
-        // functions and classes
-        // eslint-disable-next-lined no-fallthrough
-
-        case FunctionComponent:
-        case ForwardRef:
-        case SimpleMemoComponent: {
-          {
-            throw Error(
-              (getComponentNameFromFiber(returnFiber) || "Component") +
-                "(...): Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null."
-            );
-          }
-        }
-      }
     } // Remaining cases are all treated as empty.
 
     return deleteRemainingChildren(returnFiber, currentFirstChild);
@@ -9778,11 +9749,7 @@ function shouldCaptureSuspense(workInProgress, hasInvisibleParent) {
     return false;
   }
 
-  var props = workInProgress.memoizedProps; // In order to capture, the Suspense component must have a fallback prop.
-
-  if (props.fallback === undefined) {
-    return false;
-  } // Regular boundaries always capture.
+  var props = workInProgress.memoizedProps; // Regular boundaries always capture.
 
   if (props.unstable_avoidThisFallback !== true) {
     return true;
@@ -14326,12 +14293,8 @@ function updateSuspenseComponent(current, workInProgress, renderLanes) {
       // This is a new mount or this boundary is already showing a fallback state.
       // Mark this subtree context as having at least one invisible parent that could
       // handle the fallback state.
-      // Boundaries without fallbacks or should be avoided are not considered since
-      // they cannot handle preferred fallback states.
-      if (
-        nextProps.fallback !== undefined &&
-        nextProps.unstable_avoidThisFallback !== true
-      ) {
+      // Avoided boundaries are not considered since they cannot handle preferred fallback states.
+      if (nextProps.unstable_avoidThisFallback !== true) {
         suspenseContext = addSubtreeSuspenseContext(
           suspenseContext,
           InvisibleParentSuspenseContext
@@ -14365,11 +14328,6 @@ function updateSuspenseComponent(current, workInProgress, renderLanes) {
   // a stack.
 
   if (current === null) {
-    // Initial mount
-    // If we're currently hydrating, try to hydrate this boundary.
-    // But only if this has a fallback.
-    if (nextProps.fallback !== undefined);
-
     var nextPrimaryChildren = nextProps.children;
     var nextFallbackChildren = nextProps.fallback;
 
@@ -15859,42 +15817,16 @@ var updateHostText$1;
 
         appendInitialChild(parent, _instance);
       } else if (node.tag === HostPortal);
-      else if (node.tag === SuspenseComponent) {
-        if ((node.flags & Update) !== NoFlags) {
-          // Need to toggle the visibility of the primary children.
-          var newIsHidden = node.memoizedState !== null;
-
-          if (newIsHidden) {
-            var primaryChildParent = node.child;
-
-            if (primaryChildParent !== null) {
-              if (primaryChildParent.child !== null) {
-                primaryChildParent.child.return = primaryChildParent;
-                appendAllChildren(
-                  parent,
-                  primaryChildParent,
-                  true,
-                  newIsHidden
-                );
-              }
-
-              var fallbackChildParent = primaryChildParent.sibling;
+      else if (node.tag === OffscreenComponent && node.memoizedState !== null) {
+        // The children in this boundary are hidden. Toggle their visibility
+        // before appending.
+        var child = node.child;
 
-              if (fallbackChildParent !== null) {
-                fallbackChildParent.return = node;
-                node = fallbackChildParent;
-                continue;
-              }
-            }
-          }
+        if (child !== null) {
+          child.return = node;
         }
 
-        if (node.child !== null) {
-          // Continue traversing like normal
-          node.child.return = node;
-          node = node.child;
-          continue;
-        }
+        appendAllChildren(parent, node, true, true);
       } else if (node.child !== null) {
         node.child.return = node;
         node = node.child;
@@ -15954,42 +15886,16 @@ var updateHostText$1;
 
         appendChildToContainerChildSet(containerChildSet, _instance2);
       } else if (node.tag === HostPortal);
-      else if (node.tag === SuspenseComponent) {
-        if ((node.flags & Update) !== NoFlags) {
-          // Need to toggle the visibility of the primary children.
-          var newIsHidden = node.memoizedState !== null;
-
-          if (newIsHidden) {
-            var primaryChildParent = node.child;
-
-            if (primaryChildParent !== null) {
-              if (primaryChildParent.child !== null) {
-                primaryChildParent.child.return = primaryChildParent;
-                appendAllChildrenToContainer(
-                  containerChildSet,
-                  primaryChildParent,
-                  true,
-                  newIsHidden
-                );
-              }
+      else if (node.tag === OffscreenComponent && node.memoizedState !== null) {
+        // The children in this boundary are hidden. Toggle their visibility
+        // before appending.
+        var child = node.child;
 
-              var fallbackChildParent = primaryChildParent.sibling;
-
-              if (fallbackChildParent !== null) {
-                fallbackChildParent.return = node;
-                node = fallbackChildParent;
-                continue;
-              }
-            }
-          }
+        if (child !== null) {
+          child.return = node;
         }
 
-        if (node.child !== null) {
-          // Continue traversing like normal
-          node.child.return = node;
-          node = node.child;
-          continue;
-        }
+        appendAllChildrenToContainer(containerChildSet, node, true, true);
       } else if (node.child !== null) {
         node.child.return = node;
         node = node.child;
@@ -16482,17 +16388,28 @@ function completeWork(current, workInProgress, renderLanes) {
       var nextDidTimeout = nextState !== null;
       var prevDidTimeout = false;
 
-      if (current === null) {
-        if (workInProgress.memoizedProps.fallback !== undefined);
-      } else {
+      if (current === null);
+      else {
         var prevState = current.memoizedState;
         prevDidTimeout = prevState !== null;
-      }
+      } // If the suspended state of the boundary changes, we need to schedule
+      // an effect to toggle the subtree's visibility. When we switch from
+      // fallback -> primary, the inner Offscreen fiber schedules this effect
+      // as part of its normal complete phase. But when we switch from
+      // primary -> fallback, the inner Offscreen fiber does not have a complete
+      // phase. So we need to schedule its effect here.
+      //
+      // We also use this flag to connect/disconnect the effects, but the same
+      // logic applies: when re-connecting, the Offscreen fiber's complete
+      // phase will handle scheduling the effect. It's only when the fallback
+      // is active that we have to do anything special.
 
       if (nextDidTimeout && !prevDidTimeout) {
-        // TODO: This will still suspend a synchronous tree if anything
+        var offscreenFiber = workInProgress.child;
+        offscreenFiber.flags |= Visibility; // TODO: This will still suspend a synchronous tree if anything
         // in the concurrent tree already suspended during this render.
         // This is a known bug.
+
         if ((workInProgress.mode & ConcurrentMode) !== NoMode) {
           // TODO: Move this back to throwException because this is too late
           // if this is a large tree which is common for initial loads. We
@@ -16523,14 +16440,12 @@ function completeWork(current, workInProgress, renderLanes) {
         }
       }
 
-      {
-        // TODO: Only schedule updates if not prevDidTimeout.
-        if (nextDidTimeout) {
-          // If this boundary just timed out, schedule an effect to attach a
-          // retry listener to the promise. This flag is also used to hide the
-          // primary children.
-          workInProgress.flags |= Update;
-        }
+      var wakeables = workInProgress.updateQueue;
+
+      if (wakeables !== null) {
+        // Schedule an effect to attach a retry listener to the promise.
+        // TODO: Move to passive phase
+        workInProgress.flags |= Update;
       }
 
       bubbleProperties(workInProgress);
@@ -16809,18 +16724,21 @@ function completeWork(current, workInProgress, renderLanes) {
 
         if (
           prevIsHidden !== nextIsHidden &&
-          newProps.mode !== "unstable-defer-without-hiding"
+          newProps.mode !== "unstable-defer-without-hiding" && // LegacyHidden doesn't do any hiding — it only pre-renders.
+          workInProgress.tag !== LegacyHiddenComponent
         ) {
-          workInProgress.flags |= Update;
+          workInProgress.flags |= Visibility;
         }
-      } // Don't bubble properties for hidden children.
+      }
 
-      if (
-        !nextIsHidden ||
-        includesSomeLane(subtreeRenderLanes, OffscreenLane) ||
-        (workInProgress.mode & ConcurrentMode) === NoMode
-      ) {
+      if (!nextIsHidden || (workInProgress.mode & ConcurrentMode) === NoMode) {
         bubbleProperties(workInProgress);
+      } else {
+        // Don't bubble properties for hidden children unless we're rendering
+        // at offscreen priority.
+        if (includesSomeLane(subtreeRenderLanes, OffscreenLane)) {
+          bubbleProperties(workInProgress);
+        }
       }
 
       return null;
@@ -17372,24 +17290,26 @@ function commitLayoutEffectOnFiber(
   finishedWork,
   committedLanes
 ) {
-  if ((finishedWork.flags & (Update | Callback)) !== NoFlags) {
+  if ((finishedWork.flags & LayoutMask) !== NoFlags) {
     switch (finishedWork.tag) {
       case FunctionComponent:
       case ForwardRef:
       case SimpleMemoComponent: {
-        // At this point layout effects have already been destroyed (during mutation phase).
-        // This is done to prevent sibling component effects from interfering with each other,
-        // e.g. a destroy function in one component should never override a ref set
-        // by a create function in another component during the same commit.
-        if (finishedWork.mode & ProfileMode) {
-          try {
-            startLayoutEffectTimer();
+        {
+          // At this point layout effects have already been destroyed (during mutation phase).
+          // This is done to prevent sibling component effects from interfering with each other,
+          // e.g. a destroy function in one component should never override a ref set
+          // by a create function in another component during the same commit.
+          if (finishedWork.mode & ProfileMode) {
+            try {
+              startLayoutEffectTimer();
+              commitHookEffectListMount(Layout | HasEffect, finishedWork);
+            } finally {
+              recordLayoutEffectDuration(finishedWork);
+            }
+          } else {
             commitHookEffectListMount(Layout | HasEffect, finishedWork);
-          } finally {
-            recordLayoutEffectDuration(finishedWork);
           }
-        } else {
-          commitHookEffectListMount(Layout | HasEffect, finishedWork);
         }
 
         break;
@@ -17399,104 +17319,109 @@ function commitLayoutEffectOnFiber(
         var instance = finishedWork.stateNode;
 
         if (finishedWork.flags & Update) {
-          if (current === null) {
-            // We could update instance props and state here,
-            // but instead we rely on them being set during last render.
-            // TODO: revisit this when we implement resuming.
-            {
-              if (
-                finishedWork.type === finishedWork.elementType &&
-                !didWarnAboutReassigningProps
-              ) {
-                if (instance.props !== finishedWork.memoizedProps) {
-                  error(
-                    "Expected %s props to match memoized props before " +
-                      "componentDidMount. " +
-                      "This might either be because of a bug in React, or because " +
-                      "a component reassigns its own `this.props`. " +
-                      "Please file an issue.",
-                    getComponentNameFromFiber(finishedWork) || "instance"
-                  );
-                }
+          {
+            if (current === null) {
+              // We could update instance props and state here,
+              // but instead we rely on them being set during last render.
+              // TODO: revisit this when we implement resuming.
+              {
+                if (
+                  finishedWork.type === finishedWork.elementType &&
+                  !didWarnAboutReassigningProps
+                ) {
+                  if (instance.props !== finishedWork.memoizedProps) {
+                    error(
+                      "Expected %s props to match memoized props before " +
+                        "componentDidMount. " +
+                        "This might either be because of a bug in React, or because " +
+                        "a component reassigns its own `this.props`. " +
+                        "Please file an issue.",
+                      getComponentNameFromFiber(finishedWork) || "instance"
+                    );
+                  }
 
-                if (instance.state !== finishedWork.memoizedState) {
-                  error(
-                    "Expected %s state to match memoized state before " +
-                      "componentDidMount. " +
-                      "This might either be because of a bug in React, or because " +
-                      "a component reassigns its own `this.state`. " +
-                      "Please file an issue.",
-                    getComponentNameFromFiber(finishedWork) || "instance"
-                  );
+                  if (instance.state !== finishedWork.memoizedState) {
+                    error(
+                      "Expected %s state to match memoized state before " +
+                        "componentDidMount. " +
+                        "This might either be because of a bug in React, or because " +
+                        "a component reassigns its own `this.state`. " +
+                        "Please file an issue.",
+                      getComponentNameFromFiber(finishedWork) || "instance"
+                    );
+                  }
                 }
               }
-            }
 
-            if (finishedWork.mode & ProfileMode) {
-              try {
-                startLayoutEffectTimer();
+              if (finishedWork.mode & ProfileMode) {
+                try {
+                  startLayoutEffectTimer();
+                  instance.componentDidMount();
+                } finally {
+                  recordLayoutEffectDuration(finishedWork);
+                }
+              } else {
                 instance.componentDidMount();
-              } finally {
-                recordLayoutEffectDuration(finishedWork);
               }
             } else {
-              instance.componentDidMount();
-            }
-          } else {
-            var prevProps =
-              finishedWork.elementType === finishedWork.type
-                ? current.memoizedProps
-                : resolveDefaultProps(finishedWork.type, current.memoizedProps);
-            var prevState = current.memoizedState; // We could update instance props and state here,
-            // but instead we rely on them being set during last render.
-            // TODO: revisit this when we implement resuming.
+              var prevProps =
+                finishedWork.elementType === finishedWork.type
+                  ? current.memoizedProps
+                  : resolveDefaultProps(
+                      finishedWork.type,
+                      current.memoizedProps
+                    );
+              var prevState = current.memoizedState; // We could update instance props and state here,
+              // but instead we rely on them being set during last render.
+              // TODO: revisit this when we implement resuming.
 
-            {
-              if (
-                finishedWork.type === finishedWork.elementType &&
-                !didWarnAboutReassigningProps
-              ) {
-                if (instance.props !== finishedWork.memoizedProps) {
-                  error(
-                    "Expected %s props to match memoized props before " +
-                      "componentDidUpdate. " +
-                      "This might either be because of a bug in React, or because " +
-                      "a component reassigns its own `this.props`. " +
-                      "Please file an issue.",
-                    getComponentNameFromFiber(finishedWork) || "instance"
-                  );
-                }
+              {
+                if (
+                  finishedWork.type === finishedWork.elementType &&
+                  !didWarnAboutReassigningProps
+                ) {
+                  if (instance.props !== finishedWork.memoizedProps) {
+                    error(
+                      "Expected %s props to match memoized props before " +
+                        "componentDidUpdate. " +
+                        "This might either be because of a bug in React, or because " +
+                        "a component reassigns its own `this.props`. " +
+                        "Please file an issue.",
+                      getComponentNameFromFiber(finishedWork) || "instance"
+                    );
+                  }
 
-                if (instance.state !== finishedWork.memoizedState) {
-                  error(
-                    "Expected %s state to match memoized state before " +
-                      "componentDidUpdate. " +
-                      "This might either be because of a bug in React, or because " +
-                      "a component reassigns its own `this.state`. " +
-                      "Please file an issue.",
-                    getComponentNameFromFiber(finishedWork) || "instance"
-                  );
+                  if (instance.state !== finishedWork.memoizedState) {
+                    error(
+                      "Expected %s state to match memoized state before " +
+                        "componentDidUpdate. " +
+                        "This might either be because of a bug in React, or because " +
+                        "a component reassigns its own `this.state`. " +
+                        "Please file an issue.",
+                      getComponentNameFromFiber(finishedWork) || "instance"
+                    );
+                  }
                 }
               }
-            }
 
-            if (finishedWork.mode & ProfileMode) {
-              try {
-                startLayoutEffectTimer();
+              if (finishedWork.mode & ProfileMode) {
+                try {
+                  startLayoutEffectTimer();
+                  instance.componentDidUpdate(
+                    prevProps,
+                    prevState,
+                    instance.__reactInternalSnapshotBeforeUpdate
+                  );
+                } finally {
+                  recordLayoutEffectDuration(finishedWork);
+                }
+              } else {
                 instance.componentDidUpdate(
                   prevProps,
                   prevState,
                   instance.__reactInternalSnapshotBeforeUpdate
                 );
-              } finally {
-                recordLayoutEffectDuration(finishedWork);
               }
-            } else {
-              instance.componentDidUpdate(
-                prevProps,
-                prevState,
-                instance.__reactInternalSnapshotBeforeUpdate
-              );
             }
           }
         } // TODO: I think this is now always non-null by the time it reaches the
@@ -17677,8 +17602,10 @@ function commitLayoutEffectOnFiber(
   }
 
   {
-    if (finishedWork.flags & Ref) {
-      commitAttachRef(finishedWork);
+    {
+      if (finishedWork.flags & Ref) {
+        commitAttachRef(finishedWork);
+      }
     }
   }
 }
@@ -18005,6 +17932,11 @@ function commitWork(current, finishedWork) {
         // This prevents sibling component effects from interfering with each other,
         // e.g. a destroy function in one component should never override a ref set
         // by a create function in another component during the same commit.
+        // TODO: Check if we're inside an Offscreen subtree that disappeared
+        // during this commit. If so, we would have already unmounted its
+        // layout hooks. (However, since we null out the `destroy` function
+        // right before calling it, the behavior is already correct, so this
+        // would mostly be for modeling purposes.)
         if (finishedWork.mode & ProfileMode) {
           try {
             startLayoutEffectTimer();
@@ -18032,7 +17964,7 @@ function commitWork(current, finishedWork) {
       }
 
       case SuspenseComponent: {
-        commitSuspenseComponent(finishedWork);
+        commitSuspenseCallback(finishedWork);
         attachSuspenseRetryListeners(finishedWork);
         return;
       }
@@ -18057,12 +17989,9 @@ function commitWork(current, finishedWork) {
   }
 }
 
-function commitSuspenseComponent(finishedWork) {
+function commitSuspenseCallback(finishedWork) {
+  // TODO: Move this to passive phase
   var newState = finishedWork.memoizedState;
-
-  if (newState !== null) {
-    markCommitTimeOfFallback();
-  }
 }
 
 function attachSuspenseRetryListeners(finishedWork) {
@@ -18170,6 +18099,10 @@ function commitMutationEffects_complete(root) {
 }
 
 function commitMutationEffectsOnFiber(finishedWork, root) {
+  // TODO: The factoring of this phase could probably be improved. Consider
+  // switching on the type of work before checking the flags. That's what
+  // we do in all the other phases. I think this one is only different
+  // because of the shared reconcilation logic below.
   var flags = finishedWork.flags;
 
   if (flags & Ref) {
@@ -18178,6 +18111,35 @@ function commitMutationEffectsOnFiber(finishedWork, root) {
     if (current !== null) {
       commitDetachRef(current);
     }
+  }
+
+  if (flags & Visibility) {
+    switch (finishedWork.tag) {
+      case SuspenseComponent: {
+        var newState = finishedWork.memoizedState;
+        var isHidden = newState !== null;
+
+        if (isHidden) {
+          var _current = finishedWork.alternate;
+          var wasHidden = _current !== null && _current.memoizedState !== null;
+
+          if (!wasHidden) {
+            // TODO: Move to passive phase
+            markCommitTimeOfFallback();
+          }
+        }
+
+        break;
+      }
+
+      case OffscreenComponent: {
+        var _newState = finishedWork.memoizedState;
+
+        var _current2 = finishedWork.alternate;
+
+        var _wasHidden = _current2 !== null && _current2.memoizedState !== null;
+      }
+    }
   } // The following switch statement is only concerned about placement,
   // updates, and deletions. To avoid needing to add a case for every possible
   // bitmap value, we remove the secondary effects from the effect tag and
@@ -18200,8 +18162,8 @@ function commitMutationEffectsOnFiber(finishedWork, root) {
 
       finishedWork.flags &= ~Placement; // Update
 
-      var _current = finishedWork.alternate;
-      commitWork(_current, finishedWork);
+      var _current3 = finishedWork.alternate;
+      commitWork(_current3, finishedWork);
       break;
     }
 
@@ -18213,14 +18175,14 @@ function commitMutationEffectsOnFiber(finishedWork, root) {
     case HydratingAndUpdate: {
       finishedWork.flags &= ~Hydrating; // Update
 
-      var _current2 = finishedWork.alternate;
-      commitWork(_current2, finishedWork);
+      var _current4 = finishedWork.alternate;
+      commitWork(_current4, finishedWork);
       break;
     }
 
     case Update: {
-      var _current3 = finishedWork.alternate;
-      commitWork(_current3, finishedWork);
+      var _current5 = finishedWork.alternate;
+      commitWork(_current5, finishedWork);
       break;
     }
   }
@@ -18253,9 +18215,6 @@ function commitLayoutEffects_begin(subtreeRoot, root, committedLanes) {
 }
 
 function commitLayoutMountEffects_complete(subtreeRoot, root, committedLanes) {
-  // Suspense layout effects semantics don't change for legacy roots.
-  var isModernRoot = (subtreeRoot.mode & ConcurrentMode) !== NoMode;
-
   while (nextEffect !== null) {
     var fiber = nextEffect;
 
@@ -18569,7 +18528,7 @@ function ensureCorrectReturnPointer(fiber, expectedReturnFiber) {
   // anything, by checking the warning logs for the above invariant
 
   fiber.return = expectedReturnFiber;
-}
+} // TODO: Reuse reappearLayoutEffects traversal here?
 
 function invokeLayoutEffectMountInDEV(fiber) {
   {
@@ -18706,18 +18665,15 @@ var NoContext =
 var BatchedContext =
   /*               */
   1;
-var LegacyUnbatchedContext =
-  /*       */
-  4;
 var RenderContext =
   /*                */
-  8;
+  2;
 var CommitContext =
   /*                */
-  16;
+  4;
 var RetryAfterError =
   /*       */
-  32;
+  8;
 var RootIncomplete = 0;
 var RootFatalErrored = 1;
 var RootErrored = 2;
@@ -18930,35 +18886,21 @@ function scheduleUpdateOnFiber(fiber, lane, eventTime) {
     }
   }
 
-  if (lane === SyncLane) {
-    if (
-      // Check if we're inside unbatchedUpdates
-      (executionContext & LegacyUnbatchedContext) !== NoContext && // Check if we're not already rendering
-      (executionContext & (RenderContext | CommitContext)) === NoContext
-    ) {
-      // This is a legacy edge case. The initial mount of a ReactDOM.render-ed
-      // root inside of batchedUpdates should be synchronous, but layout updates
-      // should be deferred until the end of the batch.
-      performSyncWorkOnRoot(root);
-    } else {
-      ensureRootIsScheduled(root, eventTime);
+  ensureRootIsScheduled(root, eventTime);
 
-      if (
-        executionContext === NoContext &&
-        (fiber.mode & ConcurrentMode) === NoMode
-      ) {
-        // Flush the synchronous work now, unless we're already working or inside
-        // a batch. This is intentionally inside scheduleUpdateOnFiber instead of
-        // scheduleCallbackForFiber to preserve the ability to schedule a callback
-        // without immediately flushing it. We only do this for user-initiated
-        // updates, to preserve historical behavior of legacy mode.
-        resetRenderTimer();
-        flushSyncCallbacksOnlyInLegacyMode();
-      }
-    }
-  } else {
-    // Schedule other updates after in case the callback is sync.
-    ensureRootIsScheduled(root, eventTime);
+  if (
+    lane === SyncLane &&
+    executionContext === NoContext &&
+    (fiber.mode & ConcurrentMode) === NoMode && // Treat `act` as if it's inside `batchedUpdates`, even in legacy mode.
+    !ReactCurrentActQueue.isBatchingLegacy
+  ) {
+    // Flush the synchronous work now, unless we're already working or inside
+    // a batch. This is intentionally inside scheduleUpdateOnFiber instead of
+    // scheduleCallbackForFiber to preserve the ability to schedule a callback
+    // without immediately flushing it. We only do this for user-initiated
+    // updates, to preserve historical behavior of legacy mode.
+    resetRenderTimer();
+    flushSyncCallbacksOnlyInLegacyMode();
   }
 
   return root;
@@ -19095,6 +19037,10 @@ function ensureRootIsScheduled(root, currentTime) {
     // Special case: Sync React callbacks are scheduled on a special
     // internal queue
     if (root.tag === LegacyRoot) {
+      if (ReactCurrentActQueue.isBatchingLegacy !== null) {
+        ReactCurrentActQueue.didScheduleLegacyUpdate = true;
+      }
+
       scheduleLegacySyncCallback(performSyncWorkOnRoot.bind(null, root));
     } else {
       scheduleSyncCallback(performSyncWorkOnRoot.bind(null, root));
@@ -19193,6 +19139,7 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
 
   if (exitStatus !== RootIncomplete) {
     if (exitStatus === RootErrored) {
+      var prevExecutionContext = executionContext;
       executionContext |= RetryAfterError; // If an error occurred during hydration,
       // discard server response and fall back to client side render.
 
@@ -19215,6 +19162,8 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
         lanes = errorRetryLanes;
         exitStatus = renderRootSync(root, errorRetryLanes);
       }
+
+      executionContext = prevExecutionContext;
     }
 
     if (exitStatus === RootFatalErrored) {
@@ -19393,6 +19342,7 @@ function performSyncWorkOnRoot(root) {
   var exitStatus = renderRootSync(root, lanes);
 
   if (root.tag !== LegacyRoot && exitStatus === RootErrored) {
+    var prevExecutionContext = executionContext;
     executionContext |= RetryAfterError; // If an error occurred during hydration,
     // discard server response and fall back to client side render.
 
@@ -19415,6 +19365,8 @@ function performSyncWorkOnRoot(root) {
       lanes = errorRetryLanes;
       exitStatus = renderRootSync(root, lanes);
     }
+
+    executionContext = prevExecutionContext;
   }
 
   if (exitStatus === RootFatalErrored) {
@@ -19445,13 +19397,29 @@ function batchedUpdates$1(fn, a) {
     executionContext = prevExecutionContext; // If there were legacy sync updates, flush them at the end of the outer
     // most batchedUpdates-like method.
 
-    if (executionContext === NoContext) {
+    if (
+      executionContext === NoContext && // Treat `act` as if it's inside `batchedUpdates`, even in legacy mode.
+      !ReactCurrentActQueue.isBatchingLegacy
+    ) {
       resetRenderTimer();
       flushSyncCallbacksOnlyInLegacyMode();
     }
   }
 }
-function flushSync(fn, a) {
+// Warning, this opts-out of checking the function body.
+
+// eslint-disable-next-line no-redeclare
+function flushSyncWithoutWarningIfAlreadyRendering(fn) {
+  // In legacy mode, we flush pending passive effects at the beginning of the
+  // next event, not at the end of the previous one.
+  if (
+    rootWithPendingPassiveEffects !== null &&
+    rootWithPendingPassiveEffects.tag === LegacyRoot &&
+    (executionContext & (RenderContext | CommitContext)) === NoContext
+  ) {
+    flushPassiveEffects();
+  }
+
   var prevExecutionContext = executionContext;
   executionContext |= BatchedContext;
   var prevTransition = ReactCurrentBatchConfig$2.transition;
@@ -19462,7 +19430,7 @@ function flushSync(fn, a) {
     setCurrentUpdatePriority(DiscreteEventPriority);
 
     if (fn) {
-      return fn(a);
+      return fn();
     } else {
       return undefined;
     }
@@ -19475,16 +19443,24 @@ function flushSync(fn, a) {
 
     if ((executionContext & (RenderContext | CommitContext)) === NoContext) {
       flushSyncCallbacks();
-    } else {
-      {
-        error(
-          "flushSync was called from inside a lifecycle method. React cannot " +
-            "flush when React is already rendering. Consider moving this call to " +
-            "a scheduler task or micro task."
-        );
-      }
     }
   }
+} // Overload the definition to the two valid signatures.
+// Warning, this opts-out of checking the function body.
+
+// eslint-disable-next-line no-redeclare
+function flushSync(fn) {
+  {
+    if ((executionContext & (RenderContext | CommitContext)) !== NoContext) {
+      error(
+        "flushSync was called from inside a lifecycle method. React cannot " +
+          "flush when React is already rendering. Consider moving this call to " +
+          "a scheduler task or micro task."
+      );
+    }
+  }
+
+  return flushSyncWithoutWarningIfAlreadyRendering(fn);
 }
 function pushRenderLanes(fiber, lanes) {
   push(subtreeRenderLanesCursor, subtreeRenderLanes, fiber);
@@ -20123,14 +20099,6 @@ function commitRootImpl(root, renderPriorityLevel) {
     var error$1 = firstUncaughtError;
     firstUncaughtError = null;
     throw error$1;
-  }
-
-  if ((executionContext & LegacyUnbatchedContext) !== NoContext) {
-    // a ReactDOM.render-ed root inside of batchedUpdates. The commit fired
-    // synchronously, but layout updates should be deferred until the end
-    // of the batch.
-
-    return null;
   } // If the passive effects are the result of a discrete render, flush them
   // synchronously at the end of the current task so that the result is
   // immediately observable. Otherwise, we assume that they are not
@@ -22497,65 +22465,16 @@ var emptyObject$1 = {};
   Object.freeze(emptyObject$1);
 }
 
-var getInspectorDataForViewTag;
-var getInspectorDataForViewAtPoint;
+var createHierarchy;
+var getHostNode;
+var getHostProps;
+var lastNonHostInstance;
 
-{
-  var traverseOwnerTreeUp = function(hierarchy, instance) {
-    if (instance) {
-      hierarchy.unshift(instance);
-      traverseOwnerTreeUp(hierarchy, instance._debugOwner);
-    }
-  };
-
-  var getOwnerHierarchy = function(instance) {
-    var hierarchy = [];
-    traverseOwnerTreeUp(hierarchy, instance);
-    return hierarchy;
-  };
-
-  var lastNonHostInstance = function(hierarchy) {
-    for (var i = hierarchy.length - 1; i > 1; i--) {
-      var instance = hierarchy[i];
-
-      if (instance.tag !== HostComponent) {
-        return instance;
-      }
-    }
-
-    return hierarchy[0];
-  };
-
-  var getHostProps = function(fiber) {
-    var host = findCurrentHostFiber(fiber);
+var getOwnerHierarchy;
+var traverseOwnerTreeUp;
 
-    if (host) {
-      return host.memoizedProps || emptyObject$1;
-    }
-
-    return emptyObject$1;
-  };
-
-  var getHostNode = function(fiber, findNodeHandle) {
-    var hostNode; // look for children first for the hostNode
-    // as composite fibers do not have a hostNode
-
-    while (fiber) {
-      if (fiber.stateNode !== null && fiber.tag === HostComponent) {
-        hostNode = findNodeHandle(fiber.stateNode);
-      }
-
-      if (hostNode) {
-        return hostNode;
-      }
-
-      fiber = fiber.child;
-    }
-
-    return null;
-  };
-
-  var createHierarchy = function(fiberHierarchy) {
+{
+  createHierarchy = function(fiberHierarchy) {
     return fiberHierarchy.map(function(fiber) {
       return {
         name: getComponentNameFromType(fiber.type),
@@ -22586,7 +22505,36 @@ var getInspectorDataForViewAtPoint;
     });
   };
 
-  var getInspectorDataForInstance = function(closestInstance) {
+  getHostNode = function(fiber, findNodeHandle) {
+    var hostNode; // look for children first for the hostNode
+    // as composite fibers do not have a hostNode
+
+    while (fiber) {
+      if (fiber.stateNode !== null && fiber.tag === HostComponent) {
+        hostNode = findNodeHandle(fiber.stateNode);
+      }
+
+      if (hostNode) {
+        return hostNode;
+      }
+
+      fiber = fiber.child;
+    }
+
+    return null;
+  };
+
+  getHostProps = function(fiber) {
+    var host = findCurrentHostFiber(fiber);
+
+    if (host) {
+      return host.memoizedProps || emptyObject$1;
+    }
+
+    return emptyObject$1;
+  };
+
+  exports.getInspectorDataForInstance = function(closestInstance) {
     // Handle case where user clicks outside of ReactNative
     if (!closestInstance) {
       return {
@@ -22612,6 +22560,36 @@ var getInspectorDataForViewAtPoint;
     };
   };
 
+  getOwnerHierarchy = function(instance) {
+    var hierarchy = [];
+    traverseOwnerTreeUp(hierarchy, instance);
+    return hierarchy;
+  };
+
+  lastNonHostInstance = function(hierarchy) {
+    for (var i = hierarchy.length - 1; i > 1; i--) {
+      var instance = hierarchy[i];
+
+      if (instance.tag !== HostComponent) {
+        return instance;
+      }
+    }
+
+    return hierarchy[0];
+  };
+
+  traverseOwnerTreeUp = function(hierarchy, instance) {
+    if (instance) {
+      hierarchy.unshift(instance);
+      traverseOwnerTreeUp(hierarchy, instance._debugOwner);
+    }
+  };
+}
+
+var getInspectorDataForViewTag;
+var getInspectorDataForViewAtPoint;
+
+{
   getInspectorDataForViewTag = function(viewTag) {
     var closestInstance = getInstanceFromTag(viewTag); // Handle case where user clicks outside of ReactNative
 
@@ -22667,7 +22645,7 @@ var getInspectorDataForViewAtPoint;
                     height: 0
                   }
                 },
-                getInspectorDataForInstance(closestInstance)
+                exports.getInspectorDataForInstance(closestInstance)
               )
             );
           }
@@ -22680,7 +22658,9 @@ var getInspectorDataForViewAtPoint;
           nativeFabricUIManager.measure(
             internalInstanceHandle.stateNode.node,
             function(x, y, width, height, pageX, pageY) {
-              var inspectorData = getInspectorDataForInstance(closestInstance);
+              var inspectorData = exports.getInspectorDataForInstance(
+                closestInstance
+              );
               callback(
                 Object.assign({}, inspectorData, {
                   pointerY: locationY,
@@ -22703,7 +22683,7 @@ var getInspectorDataForViewAtPoint;
         findNodeHandle(inspectedView),
         [locationX, locationY],
         function(nativeViewTag, left, top, width, height) {
-          var inspectorData = getInspectorDataForInstance(
+          var inspectorData = exports.getInspectorDataForInstance(
             getInstanceFromTag(nativeViewTag)
           );
           callback(
@@ -22858,12 +22838,12 @@ function dispatchCommand(handle, command, args) {
     return;
   }
 
-  if (handle._internalInstanceHandle) {
-    nativeFabricUIManager.dispatchCommand(
-      handle._internalInstanceHandle.stateNode.node,
-      command,
-      args
-    );
+  if (handle._internalInstanceHandle != null) {
+    var stateNode = handle._internalInstanceHandle.stateNode;
+
+    if (stateNode != null) {
+      nativeFabricUIManager.dispatchCommand(stateNode.node, command, args);
+    }
   } else {
     ReactNativePrivateInterface.UIManager.dispatchViewManagerCommand(
       handle._nativeTag,
@@ -22885,11 +22865,12 @@ function sendAccessibilityEvent(handle, eventType) {
     return;
   }
 
-  if (handle._internalInstanceHandle) {
-    nativeFabricUIManager.sendAccessibilityEvent(
-      handle._internalInstanceHandle.stateNode.node,
-      eventType
-    );
+  if (handle._internalInstanceHandle != null) {
+    var stateNode = handle._internalInstanceHandle.stateNode;
+
+    if (stateNode != null) {
+      nativeFabricUIManager.sendAccessibilityEvent(stateNode.node, eventType);
+    }
   } else {
     ReactNativePrivateInterface.legacySendAccessibilityEvent(
       handle._nativeTag,
diff --git a/Libraries/Renderer/implementations/ReactFabric-prod.fb.js b/Libraries/Renderer/implementations/ReactFabric-prod.fb.js
index 4991274c2da48f..829170b1fe9a5c 100644
--- a/Libraries/Renderer/implementations/ReactFabric-prod.fb.js
+++ b/Libraries/Renderer/implementations/ReactFabric-prod.fb.js
@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<065d375daf77622fdbba58722ce9d961>>
+ * @generated SignedSource<<8066df1aa410b680ab0fb087ce46a9a4>>
  */
 
 "use strict";
@@ -930,7 +930,7 @@ eventPluginOrder = Array.prototype.slice.call([
   "ReactNativeBridgeEventPlugin"
 ]);
 recomputePluginOrdering();
-var injectedNamesToPlugins$jscomp$inline_216 = {
+var injectedNamesToPlugins$jscomp$inline_220 = {
     ResponderEventPlugin: ResponderEventPlugin,
     ReactNativeBridgeEventPlugin: {
       eventTypes: {},
@@ -965,34 +965,34 @@ var injectedNamesToPlugins$jscomp$inline_216 = {
       }
     }
   },
-  isOrderingDirty$jscomp$inline_217 = !1,
-  pluginName$jscomp$inline_218;
-for (pluginName$jscomp$inline_218 in injectedNamesToPlugins$jscomp$inline_216)
+  isOrderingDirty$jscomp$inline_221 = !1,
+  pluginName$jscomp$inline_222;
+for (pluginName$jscomp$inline_222 in injectedNamesToPlugins$jscomp$inline_220)
   if (
-    injectedNamesToPlugins$jscomp$inline_216.hasOwnProperty(
-      pluginName$jscomp$inline_218
+    injectedNamesToPlugins$jscomp$inline_220.hasOwnProperty(
+      pluginName$jscomp$inline_222
     )
   ) {
-    var pluginModule$jscomp$inline_219 =
-      injectedNamesToPlugins$jscomp$inline_216[pluginName$jscomp$inline_218];
+    var pluginModule$jscomp$inline_223 =
+      injectedNamesToPlugins$jscomp$inline_220[pluginName$jscomp$inline_222];
     if (
-      !namesToPlugins.hasOwnProperty(pluginName$jscomp$inline_218) ||
-      namesToPlugins[pluginName$jscomp$inline_218] !==
-        pluginModule$jscomp$inline_219
+      !namesToPlugins.hasOwnProperty(pluginName$jscomp$inline_222) ||
+      namesToPlugins[pluginName$jscomp$inline_222] !==
+        pluginModule$jscomp$inline_223
     ) {
-      if (namesToPlugins[pluginName$jscomp$inline_218])
+      if (namesToPlugins[pluginName$jscomp$inline_222])
         throw Error(
           "EventPluginRegistry: Cannot inject two different event plugins using the same name, `" +
-            pluginName$jscomp$inline_218 +
+            pluginName$jscomp$inline_222 +
             "`."
         );
       namesToPlugins[
-        pluginName$jscomp$inline_218
-      ] = pluginModule$jscomp$inline_219;
-      isOrderingDirty$jscomp$inline_217 = !0;
+        pluginName$jscomp$inline_222
+      ] = pluginModule$jscomp$inline_223;
+      isOrderingDirty$jscomp$inline_221 = !0;
     }
   }
-isOrderingDirty$jscomp$inline_217 && recomputePluginOrdering();
+isOrderingDirty$jscomp$inline_221 && recomputePluginOrdering();
 function getInstanceFromInstance(instanceHandle) {
   return instanceHandle;
 }
@@ -2216,7 +2216,7 @@ function enqueueUpdate(fiber, update) {
     ((updateQueue = updateQueue.shared),
     null !== workInProgressRoot &&
     0 !== (fiber.mode & 1) &&
-    0 === (executionContext & 8)
+    0 === (executionContext & 2)
       ? ((fiber = updateQueue.interleaved),
         null === fiber
           ? ((update.next = update),
@@ -3053,60 +3053,49 @@ function ChildReconciler(shouldTrackSideEffects) {
     return iteratorFn;
   }
   return function(returnFiber, currentFirstChild, newChild, lanes) {
-    var isUnkeyedTopLevelFragment =
-      "object" === typeof newChild &&
+    "object" === typeof newChild &&
       null !== newChild &&
       newChild.type === REACT_FRAGMENT_TYPE &&
-      null === newChild.key;
-    isUnkeyedTopLevelFragment && (newChild = newChild.props.children);
+      null === newChild.key &&
+      (newChild = newChild.props.children);
     if ("object" === typeof newChild && null !== newChild) {
       switch (newChild.$$typeof) {
         case REACT_ELEMENT_TYPE:
           a: {
-            var key = newChild.key;
             for (
-              isUnkeyedTopLevelFragment = currentFirstChild;
-              null !== isUnkeyedTopLevelFragment;
+              var key = newChild.key, child = currentFirstChild;
+              null !== child;
 
             ) {
-              if (isUnkeyedTopLevelFragment.key === key) {
+              if (child.key === key) {
                 key = newChild.type;
                 if (key === REACT_FRAGMENT_TYPE) {
-                  if (7 === isUnkeyedTopLevelFragment.tag) {
-                    deleteRemainingChildren(
-                      returnFiber,
-                      isUnkeyedTopLevelFragment.sibling
-                    );
+                  if (7 === child.tag) {
+                    deleteRemainingChildren(returnFiber, child.sibling);
                     currentFirstChild = useFiber(
-                      isUnkeyedTopLevelFragment,
+                      child,
                       newChild.props.children
                     );
                     currentFirstChild.return = returnFiber;
                     returnFiber = currentFirstChild;
                     break a;
                   }
-                } else if (isUnkeyedTopLevelFragment.elementType === key) {
-                  deleteRemainingChildren(
-                    returnFiber,
-                    isUnkeyedTopLevelFragment.sibling
-                  );
-                  currentFirstChild = useFiber(
-                    isUnkeyedTopLevelFragment,
-                    newChild.props
-                  );
+                } else if (child.elementType === key) {
+                  deleteRemainingChildren(returnFiber, child.sibling);
+                  currentFirstChild = useFiber(child, newChild.props);
                   currentFirstChild.ref = coerceRef(
                     returnFiber,
-                    isUnkeyedTopLevelFragment,
+                    child,
                     newChild
                   );
                   currentFirstChild.return = returnFiber;
                   returnFiber = currentFirstChild;
                   break a;
                 }
-                deleteRemainingChildren(returnFiber, isUnkeyedTopLevelFragment);
+                deleteRemainingChildren(returnFiber, child);
                 break;
-              } else deleteChild(returnFiber, isUnkeyedTopLevelFragment);
-              isUnkeyedTopLevelFragment = isUnkeyedTopLevelFragment.sibling;
+              } else deleteChild(returnFiber, child);
+              child = child.sibling;
             }
             newChild.type === REACT_FRAGMENT_TYPE
               ? ((currentFirstChild = createFiberFromFragment(
@@ -3136,12 +3125,8 @@ function ChildReconciler(shouldTrackSideEffects) {
           return placeSingleChild(returnFiber);
         case REACT_PORTAL_TYPE:
           a: {
-            for (
-              isUnkeyedTopLevelFragment = newChild.key;
-              null !== currentFirstChild;
-
-            ) {
-              if (currentFirstChild.key === isUnkeyedTopLevelFragment)
+            for (child = newChild.key; null !== currentFirstChild; ) {
+              if (currentFirstChild.key === child)
                 if (
                   4 === currentFirstChild.tag &&
                   currentFirstChild.stateNode.containerInfo ===
@@ -3193,9 +3178,8 @@ function ChildReconciler(shouldTrackSideEffects) {
         );
       throwOnInvalidObjectType(returnFiber, newChild);
     }
-    if ("string" === typeof newChild || "number" === typeof newChild)
-      return (
-        (newChild = "" + newChild),
+    return "string" === typeof newChild || "number" === typeof newChild
+      ? ((newChild = "" + newChild),
         null !== currentFirstChild && 6 === currentFirstChild.tag
           ? (deleteRemainingChildren(returnFiber, currentFirstChild.sibling),
             (currentFirstChild = useFiber(currentFirstChild, newChild)),
@@ -3209,20 +3193,8 @@ function ChildReconciler(shouldTrackSideEffects) {
             )),
             (currentFirstChild.return = returnFiber),
             (returnFiber = currentFirstChild)),
-        placeSingleChild(returnFiber)
-      );
-    if ("undefined" === typeof newChild && !isUnkeyedTopLevelFragment)
-      switch (returnFiber.tag) {
-        case 1:
-        case 0:
-        case 11:
-        case 15:
-          throw Error(
-            (getComponentNameFromFiber(returnFiber) || "Component") +
-              "(...): Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null."
-          );
-      }
-    return deleteRemainingChildren(returnFiber, currentFirstChild);
+        placeSingleChild(returnFiber))
+      : deleteRemainingChildren(returnFiber, currentFirstChild);
   };
 }
 var reconcileChildFibers = ChildReconciler(!0),
@@ -3777,7 +3749,7 @@ function dispatchAction(fiber, queue, action) {
     if (
       null !== workInProgressRoot &&
       0 !== (fiber.mode & 1) &&
-      0 === (executionContext & 8)
+      0 === (executionContext & 2)
     ) {
       var interleaved = queue.interleaved;
       null === interleaved
@@ -4573,7 +4545,6 @@ function updateSuspenseComponent(current, workInProgress, renderLanes) {
   JSCompiler_temp
     ? ((showFallback = !0), (workInProgress.flags &= -129))
     : (null !== current && null === current.memoizedState) ||
-      void 0 === nextProps.fallback ||
       !0 === nextProps.unstable_avoidThisFallback ||
       (suspenseContext |= 1);
   push(suspenseStackCursor, suspenseContext & 1);
@@ -4938,32 +4909,16 @@ appendAllChildren = function(
       if (needsVisibilityToggle && isHidden)
         throw Error("Not yet implemented.");
       appendChildNode(parent.node, instance.node);
-    } else if (4 !== node.tag) {
-      if (
-        13 === node.tag &&
-        0 !== (node.flags & 4) &&
-        (instance = null !== node.memoizedState)
-      ) {
-        var primaryChildParent = node.child;
-        if (
-          null !== primaryChildParent &&
-          (null !== primaryChildParent.child &&
-            ((primaryChildParent.child.return = primaryChildParent),
-            appendAllChildren(parent, primaryChildParent, !0, instance)),
-          (instance = primaryChildParent.sibling),
-          null !== instance)
-        ) {
-          instance.return = node;
-          node = instance;
-          continue;
-        }
-      }
-      if (null !== node.child) {
+    } else if (4 !== node.tag)
+      if (22 === node.tag && null !== node.memoizedState)
+        (instance = node.child),
+          null !== instance && (instance.return = node),
+          appendAllChildren(parent, node, !0, !0);
+      else if (null !== node.child) {
         node.child.return = node;
         node = node.child;
         continue;
       }
-    }
     if (node === workInProgress) break;
     for (; null === node.sibling; ) {
       if (null === node.return || node.return === workInProgress) return;
@@ -4991,37 +4946,16 @@ function appendAllChildrenToContainer(
       if (needsVisibilityToggle && isHidden)
         throw Error("Not yet implemented.");
       appendChildNodeToSet(containerChildSet, instance.node);
-    } else if (4 !== node.tag) {
-      if (
-        13 === node.tag &&
-        0 !== (node.flags & 4) &&
-        (instance = null !== node.memoizedState)
-      ) {
-        var primaryChildParent = node.child;
-        if (
-          null !== primaryChildParent &&
-          (null !== primaryChildParent.child &&
-            ((primaryChildParent.child.return = primaryChildParent),
-            appendAllChildrenToContainer(
-              containerChildSet,
-              primaryChildParent,
-              !0,
-              instance
-            )),
-          (instance = primaryChildParent.sibling),
-          null !== instance)
-        ) {
-          instance.return = node;
-          node = instance;
-          continue;
-        }
-      }
-      if (null !== node.child) {
+    } else if (4 !== node.tag)
+      if (22 === node.tag && null !== node.memoizedState)
+        (instance = node.child),
+          null !== instance && (instance.return = node),
+          appendAllChildrenToContainer(containerChildSet, node, !0, !0);
+      else if (null !== node.child) {
         node.child.return = node;
         node = node.child;
         continue;
       }
-    }
     if (node === workInProgress) break;
     for (; null === node.sibling; ) {
       if (null === node.return || node.return === workInProgress) return;
@@ -5262,10 +5196,13 @@ function completeWork(current, workInProgress, renderLanes) {
       newProps = workInProgress.memoizedState;
       if (0 !== (workInProgress.flags & 128))
         return (workInProgress.lanes = renderLanes), workInProgress;
-      newProps = null !== newProps;
       renderLanes = !1;
       null !== current && (renderLanes = null !== current.memoizedState);
-      if (newProps && !renderLanes && 0 !== (workInProgress.mode & 1))
+      if (
+        null !== newProps &&
+        !renderLanes &&
+        ((workInProgress.child.flags |= 4096), 0 !== (workInProgress.mode & 1))
+      )
         if (
           (null === current &&
             !0 !== workInProgress.memoizedProps.unstable_avoidThisFallback) ||
@@ -5287,7 +5224,7 @@ function completeWork(current, workInProgress, renderLanes) {
               workInProgressRootRenderLanes
             );
         }
-      newProps && (workInProgress.flags |= 4);
+      null !== workInProgress.updateQueue && (workInProgress.flags |= 4);
       bubbleProperties(workInProgress);
       return null;
     case 4:
@@ -5439,11 +5376,12 @@ function completeWork(current, workInProgress, renderLanes) {
         null !== current &&
           (null !== current.memoizedState) !== renderLanes &&
           "unstable-defer-without-hiding" !== newProps.mode &&
-          (workInProgress.flags |= 4),
-        (renderLanes &&
-          0 === (subtreeRenderLanes & 1073741824) &&
-          0 !== (workInProgress.mode & 1)) ||
-          bubbleProperties(workInProgress),
+          23 !== workInProgress.tag &&
+          (workInProgress.flags |= 4096),
+        renderLanes && 0 !== (workInProgress.mode & 1)
+          ? 0 !== (subtreeRenderLanes & 1073741824) &&
+            bubbleProperties(workInProgress)
+          : bubbleProperties(workInProgress),
         null
       );
   }
@@ -5640,8 +5578,6 @@ function commitWork(current, finishedWork) {
     case 12:
       return;
     case 13:
-      null !== finishedWork.memoizedState &&
-        (globalMostRecentFallbackTime = now());
       attachSuspenseRetryListeners(finishedWork);
       return;
     case 19:
@@ -5788,6 +5724,15 @@ function commitMutationEffects(root, firstChild) {
                   : (currentRef.current = null));
             }
           }
+          if (flags & 4096)
+            switch (root.tag) {
+              case 13:
+                if (null !== root.memoizedState) {
+                  var current$86 = root.alternate;
+                  if (null === current$86 || null === current$86.memoizedState)
+                    globalMostRecentFallbackTime = now();
+                }
+            }
           switch (flags & 2054) {
             case 2:
               root.flags &= -3;
@@ -5823,15 +5768,15 @@ function commitLayoutEffects(finishedWork) {
   for (nextEffect = finishedWork; null !== nextEffect; ) {
     var fiber = nextEffect,
       firstChild = fiber.child;
-    if (0 !== (fiber.subtreeFlags & 324) && null !== firstChild)
+    if (0 !== (fiber.subtreeFlags & 4420) && null !== firstChild)
       (firstChild.return = fiber), (nextEffect = firstChild);
     else
       for (fiber = finishedWork; null !== nextEffect; ) {
         firstChild = nextEffect;
-        if (0 !== (firstChild.flags & 324)) {
+        if (0 !== (firstChild.flags & 4420)) {
           var current = firstChild.alternate;
           try {
-            if (0 !== (firstChild.flags & 68))
+            if (0 !== (firstChild.flags & 4420))
               switch (firstChild.tag) {
                 case 0:
                 case 11:
@@ -5960,7 +5905,7 @@ var ceil = Math.ceil,
   currentEventTime = -1,
   currentEventTransitionLane = 0;
 function requestEventTime() {
-  return 0 !== (executionContext & 24)
+  return 0 !== (executionContext & 6)
     ? now()
     : -1 !== currentEventTime
     ? currentEventTime
@@ -5968,7 +5913,7 @@ function requestEventTime() {
 }
 function requestUpdateLane(fiber) {
   if (0 === (fiber.mode & 1)) return 1;
-  if (0 !== (executionContext & 8) && 0 !== workInProgressRootRenderLanes)
+  if (0 !== (executionContext & 2) && 0 !== workInProgressRootRenderLanes)
     return workInProgressRootRenderLanes & -workInProgressRootRenderLanes;
   if (0 !== ReactCurrentBatchConfig.transition)
     return (
@@ -6006,18 +5951,15 @@ function scheduleUpdateOnFiber(fiber, lane, eventTime) {
   if (null === root) return null;
   markRootUpdated(root, lane, eventTime);
   root === workInProgressRoot &&
-    (0 === (executionContext & 8) && (workInProgressRootUpdatedLanes |= lane),
+    (0 === (executionContext & 2) && (workInProgressRootUpdatedLanes |= lane),
     4 === workInProgressRootExitStatus &&
       markRootSuspended$1(root, workInProgressRootRenderLanes));
-  1 === lane
-    ? 0 !== (executionContext & 4) && 0 === (executionContext & 24)
-      ? performSyncWorkOnRoot(root)
-      : (ensureRootIsScheduled(root, eventTime),
-        0 === executionContext &&
-          0 === (fiber.mode & 1) &&
-          ((workInProgressRootRenderTargetTime = now() + 500),
-          includesLegacySyncCallbacks && flushSyncCallbacks()))
-    : ensureRootIsScheduled(root, eventTime);
+  ensureRootIsScheduled(root, eventTime);
+  1 === lane &&
+    0 === executionContext &&
+    0 === (fiber.mode & 1) &&
+    ((workInProgressRootRenderTargetTime = now() + 500),
+    includesLegacySyncCallbacks && flushSyncCallbacks());
   return root;
 }
 function markUpdateLaneFromFiberToRoot(sourceFiber, lane) {
@@ -6107,7 +6049,7 @@ function ensureRootIsScheduled(root, currentTime) {
 function performConcurrentWorkOnRoot(root, didTimeout) {
   currentEventTime = -1;
   currentEventTransitionLane = 0;
-  if (0 !== (executionContext & 24))
+  if (0 !== (executionContext & 6))
     throw Error("Should not already be working.");
   var originalCallbackNode = root.callbackNode;
   if (flushPassiveEffects() && root.callbackNode !== originalCallbackNode)
@@ -6126,7 +6068,7 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
   if (JSCompiler_inline_result && !didTimeout) {
     didTimeout = lanes;
     JSCompiler_inline_result = executionContext;
-    executionContext |= 8;
+    executionContext |= 2;
     var prevDispatcher = pushDispatcher();
     if (
       workInProgressRoot !== root ||
@@ -6153,12 +6095,14 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
   } else didTimeout = renderRootSync(root, lanes);
   if (0 !== didTimeout) {
     2 === didTimeout &&
-      ((executionContext |= 32),
+      ((JSCompiler_inline_result = executionContext),
+      (executionContext |= 8),
       root.hydrate && ((root.hydrate = !1), shim(root.containerInfo)),
-      (JSCompiler_inline_result = getLanesToRetrySynchronouslyOnError(root)),
-      0 !== JSCompiler_inline_result &&
-        ((lanes = JSCompiler_inline_result),
-        (didTimeout = renderRootSync(root, JSCompiler_inline_result))));
+      (prevDispatcher = getLanesToRetrySynchronouslyOnError(root)),
+      0 !== prevDispatcher &&
+        ((lanes = prevDispatcher),
+        (didTimeout = renderRootSync(root, prevDispatcher))),
+      (executionContext = JSCompiler_inline_result));
     if (1 === didTimeout)
       throw ((originalCallbackNode = workInProgressRootFatalError),
       prepareFreshStack(root, 0),
@@ -6258,18 +6202,20 @@ function markRootSuspended$1(root, suspendedLanes) {
   }
 }
 function performSyncWorkOnRoot(root) {
-  if (0 !== (executionContext & 24))
+  if (0 !== (executionContext & 6))
     throw Error("Should not already be working.");
   flushPassiveEffects();
   var lanes = getNextLanes(root, 0);
   if (0 === (lanes & 1)) return ensureRootIsScheduled(root, now()), null;
   var exitStatus = renderRootSync(root, lanes);
   if (0 !== root.tag && 2 === exitStatus) {
-    executionContext |= 32;
+    var prevExecutionContext = executionContext;
+    executionContext |= 8;
     root.hydrate && ((root.hydrate = !1), shim(root.containerInfo));
     var errorRetryLanes = getLanesToRetrySynchronouslyOnError(root);
     0 !== errorRetryLanes &&
       ((lanes = errorRetryLanes), (exitStatus = renderRootSync(root, lanes)));
+    executionContext = prevExecutionContext;
   }
   if (1 === exitStatus)
     throw ((exitStatus = workInProgressRootFatalError),
@@ -6417,19 +6363,17 @@ function handleError(root$jscomp$0, thrownValue) {
             var JSCompiler_temp;
             if ((JSCompiler_temp = 13 === workInProgress$30.tag)) {
               var nextState = workInProgress$30.memoizedState;
-              if (null !== nextState)
-                JSCompiler_temp = null !== nextState.dehydrated ? !0 : !1;
-              else {
-                var props = workInProgress$30.memoizedProps;
-                JSCompiler_temp =
-                  void 0 === props.fallback
-                    ? !1
-                    : !0 !== props.unstable_avoidThisFallback
+              JSCompiler_temp =
+                null !== nextState
+                  ? null !== nextState.dehydrated
                     ? !0
-                    : hasInvisibleParentBoundary
-                    ? !1
-                    : !0;
-              }
+                    : !1
+                  : !0 !==
+                    workInProgress$30.memoizedProps.unstable_avoidThisFallback
+                  ? !0
+                  : hasInvisibleParentBoundary
+                  ? !1
+                  : !0;
             }
             if (JSCompiler_temp) {
               var wakeables = workInProgress$30.updateQueue;
@@ -6549,7 +6493,7 @@ function pushDispatcher() {
 }
 function renderRootSync(root, lanes) {
   var prevExecutionContext = executionContext;
-  executionContext |= 8;
+  executionContext |= 2;
   var prevDispatcher = pushDispatcher();
   (workInProgressRoot === root && workInProgressRootRenderLanes === lanes) ||
     prepareFreshStack(root, lanes);
@@ -6635,7 +6579,7 @@ function commitRoot(root) {
 function commitRootImpl(root, renderPriorityLevel) {
   do flushPassiveEffects();
   while (null !== rootWithPendingPassiveEffects);
-  if (0 !== (executionContext & 24))
+  if (0 !== (executionContext & 6))
     throw Error("Should not already be working.");
   var finishedWork = root.finishedWork,
     lanes = root.finishedLanes;
@@ -6668,7 +6612,7 @@ function commitRootImpl(root, renderPriorityLevel) {
     var previousPriority = currentUpdatePriority;
     currentUpdatePriority = 1;
     var prevExecutionContext = executionContext;
-    executionContext |= 16;
+    executionContext |= 4;
     ReactCurrentOwner$2.current = null;
     commitBeforeMutationEffects(root, finishedWork);
     commitMutationEffects(root, finishedWork);
@@ -6697,7 +6641,6 @@ function commitRootImpl(root, renderPriorityLevel) {
     (root = firstUncaughtError),
     (firstUncaughtError = null),
     root);
-  if (0 !== (executionContext & 4)) return null;
   0 !== (pendingPassiveEffectsLanes & 1) &&
     0 !== root.tag &&
     flushPassiveEffects();
@@ -6718,10 +6661,10 @@ function flushPassiveEffects() {
         renderPriority = rootWithPendingPassiveEffects;
         rootWithPendingPassiveEffects = null;
         pendingPassiveEffectsLanes = 0;
-        if (0 !== (executionContext & 24))
+        if (0 !== (executionContext & 6))
           throw Error("Cannot flush passive effects while already rendering.");
         var prevExecutionContext = executionContext;
-        executionContext |= 16;
+        executionContext |= 4;
         for (nextEffect = renderPriority.current; null !== nextEffect; ) {
           var fiber = nextEffect,
             child = fiber.child;
@@ -7731,6 +7674,95 @@ function updateContainer(element, container, parentComponent, callback) {
 function emptyFindFiberByHostInstance() {
   return null;
 }
+var emptyObject$1 = {},
+  createHierarchy,
+  getHostNode,
+  getHostProps,
+  lastNonHostInstance,
+  getOwnerHierarchy,
+  traverseOwnerTreeUp;
+createHierarchy = function(fiberHierarchy) {
+  return fiberHierarchy.map(function(fiber) {
+    return {
+      name: getComponentNameFromType(fiber.type),
+      getInspectorData: function(findNodeHandle) {
+        return {
+          props: getHostProps(fiber),
+          source: fiber._debugSource,
+          measure: function(callback) {
+            var hostFiber = findCurrentHostFiber(fiber);
+            if (
+              (hostFiber =
+                null != hostFiber &&
+                null !== hostFiber.stateNode &&
+                hostFiber.stateNode.node)
+            )
+              nativeFabricUIManager.measure(hostFiber, callback);
+            else
+              return ReactNativePrivateInterface.UIManager.measure(
+                getHostNode(fiber, findNodeHandle),
+                callback
+              );
+          }
+        };
+      }
+    };
+  });
+};
+getHostNode = function(fiber, findNodeHandle) {
+  for (var hostNode; fiber; ) {
+    null !== fiber.stateNode &&
+      5 === fiber.tag &&
+      (hostNode = findNodeHandle(fiber.stateNode));
+    if (hostNode) return hostNode;
+    fiber = fiber.child;
+  }
+  return null;
+};
+getHostProps = function(fiber) {
+  return (fiber = findCurrentHostFiber(fiber))
+    ? fiber.memoizedProps || emptyObject$1
+    : emptyObject$1;
+};
+exports.getInspectorDataForInstance = function(closestInstance) {
+  if (!closestInstance)
+    return {
+      hierarchy: [],
+      props: emptyObject$1,
+      selectedIndex: null,
+      source: null
+    };
+  closestInstance = findCurrentFiberUsingSlowPath(closestInstance);
+  var fiberHierarchy = getOwnerHierarchy(closestInstance),
+    instance = lastNonHostInstance(fiberHierarchy);
+  closestInstance = createHierarchy(fiberHierarchy);
+  var props = getHostProps(instance),
+    source = instance._debugSource;
+  fiberHierarchy = fiberHierarchy.indexOf(instance);
+  return {
+    hierarchy: closestInstance,
+    props: props,
+    selectedIndex: fiberHierarchy,
+    source: source
+  };
+};
+getOwnerHierarchy = function(instance) {
+  var hierarchy = [];
+  traverseOwnerTreeUp(hierarchy, instance);
+  return hierarchy;
+};
+lastNonHostInstance = function(hierarchy) {
+  for (var i = hierarchy.length - 1; 1 < i; i--) {
+    var instance = hierarchy[i];
+    if (5 !== instance.tag) return instance;
+  }
+  return hierarchy[0];
+};
+traverseOwnerTreeUp = function(hierarchy, instance) {
+  instance &&
+    (hierarchy.unshift(instance),
+    traverseOwnerTreeUp(hierarchy, instance._debugOwner));
+};
 function findNodeHandle(componentOrHandle) {
   if (null == componentOrHandle) return null;
   if ("number" === typeof componentOrHandle) return componentOrHandle;
@@ -7757,10 +7789,10 @@ batchedUpdatesImpl = function(fn, a) {
   }
 };
 var roots = new Map(),
-  devToolsConfig$jscomp$inline_939 = {
+  devToolsConfig$jscomp$inline_949 = {
     findFiberByHostInstance: getInstanceFromInstance,
     bundleType: 0,
-    version: "18.0.0-cae635054-20210626",
+    version: "18.0.0-419cc9c37-20210726",
     rendererPackageName: "react-native-renderer",
     rendererConfig: {
       getInspectorDataForViewTag: function() {
@@ -7775,11 +7807,11 @@ var roots = new Map(),
       }.bind(null, findNodeHandle)
     }
   };
-var internals$jscomp$inline_1177 = {
-  bundleType: devToolsConfig$jscomp$inline_939.bundleType,
-  version: devToolsConfig$jscomp$inline_939.version,
-  rendererPackageName: devToolsConfig$jscomp$inline_939.rendererPackageName,
-  rendererConfig: devToolsConfig$jscomp$inline_939.rendererConfig,
+var internals$jscomp$inline_1186 = {
+  bundleType: devToolsConfig$jscomp$inline_949.bundleType,
+  version: devToolsConfig$jscomp$inline_949.version,
+  rendererPackageName: devToolsConfig$jscomp$inline_949.rendererPackageName,
+  rendererConfig: devToolsConfig$jscomp$inline_949.rendererConfig,
   overrideHookState: null,
   overrideHookStateDeletePath: null,
   overrideHookStateRenamePath: null,
@@ -7795,26 +7827,26 @@ var internals$jscomp$inline_1177 = {
     return null === fiber ? null : fiber.stateNode;
   },
   findFiberByHostInstance:
-    devToolsConfig$jscomp$inline_939.findFiberByHostInstance ||
+    devToolsConfig$jscomp$inline_949.findFiberByHostInstance ||
     emptyFindFiberByHostInstance,
   findHostInstancesForRefresh: null,
   scheduleRefresh: null,
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "18.0.0-cae635054-20210626"
+  reconcilerVersion: "18.0.0-419cc9c37-20210726"
 };
 if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
-  var hook$jscomp$inline_1178 = __REACT_DEVTOOLS_GLOBAL_HOOK__;
+  var hook$jscomp$inline_1187 = __REACT_DEVTOOLS_GLOBAL_HOOK__;
   if (
-    !hook$jscomp$inline_1178.isDisabled &&
-    hook$jscomp$inline_1178.supportsFiber
+    !hook$jscomp$inline_1187.isDisabled &&
+    hook$jscomp$inline_1187.supportsFiber
   )
     try {
-      (rendererID = hook$jscomp$inline_1178.inject(
-        internals$jscomp$inline_1177
+      (rendererID = hook$jscomp$inline_1187.inject(
+        internals$jscomp$inline_1186
       )),
-        (injectedHook = hook$jscomp$inline_1178);
+        (injectedHook = hook$jscomp$inline_1187);
     } catch (err) {}
 }
 exports.createPortal = function(children, containerTag) {
@@ -7827,12 +7859,10 @@ exports.createPortal = function(children, containerTag) {
 };
 exports.dispatchCommand = function(handle, command, args) {
   null != handle._nativeTag &&
-    (handle._internalInstanceHandle
-      ? nativeFabricUIManager.dispatchCommand(
-          handle._internalInstanceHandle.stateNode.node,
-          command,
-          args
-        )
+    (null != handle._internalInstanceHandle
+      ? ((handle = handle._internalInstanceHandle.stateNode),
+        null != handle &&
+          nativeFabricUIManager.dispatchCommand(handle.node, command, args))
       : ReactNativePrivateInterface.UIManager.dispatchViewManagerCommand(
           handle._nativeTag,
           command,
@@ -7878,11 +7908,10 @@ exports.render = function(element, containerTag, callback, concurrentRoot) {
 };
 exports.sendAccessibilityEvent = function(handle, eventType) {
   null != handle._nativeTag &&
-    (handle._internalInstanceHandle
-      ? nativeFabricUIManager.sendAccessibilityEvent(
-          handle._internalInstanceHandle.stateNode.node,
-          eventType
-        )
+    (null != handle._internalInstanceHandle
+      ? ((handle = handle._internalInstanceHandle.stateNode),
+        null != handle &&
+          nativeFabricUIManager.sendAccessibilityEvent(handle.node, eventType))
       : ReactNativePrivateInterface.legacySendAccessibilityEvent(
           handle._nativeTag,
           eventType
diff --git a/Libraries/Renderer/implementations/ReactFabric-profiling.fb.js b/Libraries/Renderer/implementations/ReactFabric-profiling.fb.js
index ac6cbca15c7c20..6163d4f5d15951 100644
--- a/Libraries/Renderer/implementations/ReactFabric-profiling.fb.js
+++ b/Libraries/Renderer/implementations/ReactFabric-profiling.fb.js
@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<6166092fac6dde5ba6dc59392f7ac520>>
+ * @generated SignedSource<<ec4baa84284708f041af7b0602db24d0>>
  */
 
 "use strict";
@@ -930,7 +930,7 @@ eventPluginOrder = Array.prototype.slice.call([
   "ReactNativeBridgeEventPlugin"
 ]);
 recomputePluginOrdering();
-var injectedNamesToPlugins$jscomp$inline_224 = {
+var injectedNamesToPlugins$jscomp$inline_228 = {
     ResponderEventPlugin: ResponderEventPlugin,
     ReactNativeBridgeEventPlugin: {
       eventTypes: {},
@@ -965,34 +965,34 @@ var injectedNamesToPlugins$jscomp$inline_224 = {
       }
     }
   },
-  isOrderingDirty$jscomp$inline_225 = !1,
-  pluginName$jscomp$inline_226;
-for (pluginName$jscomp$inline_226 in injectedNamesToPlugins$jscomp$inline_224)
+  isOrderingDirty$jscomp$inline_229 = !1,
+  pluginName$jscomp$inline_230;
+for (pluginName$jscomp$inline_230 in injectedNamesToPlugins$jscomp$inline_228)
   if (
-    injectedNamesToPlugins$jscomp$inline_224.hasOwnProperty(
-      pluginName$jscomp$inline_226
+    injectedNamesToPlugins$jscomp$inline_228.hasOwnProperty(
+      pluginName$jscomp$inline_230
     )
   ) {
-    var pluginModule$jscomp$inline_227 =
-      injectedNamesToPlugins$jscomp$inline_224[pluginName$jscomp$inline_226];
+    var pluginModule$jscomp$inline_231 =
+      injectedNamesToPlugins$jscomp$inline_228[pluginName$jscomp$inline_230];
     if (
-      !namesToPlugins.hasOwnProperty(pluginName$jscomp$inline_226) ||
-      namesToPlugins[pluginName$jscomp$inline_226] !==
-        pluginModule$jscomp$inline_227
+      !namesToPlugins.hasOwnProperty(pluginName$jscomp$inline_230) ||
+      namesToPlugins[pluginName$jscomp$inline_230] !==
+        pluginModule$jscomp$inline_231
     ) {
-      if (namesToPlugins[pluginName$jscomp$inline_226])
+      if (namesToPlugins[pluginName$jscomp$inline_230])
         throw Error(
           "EventPluginRegistry: Cannot inject two different event plugins using the same name, `" +
-            pluginName$jscomp$inline_226 +
+            pluginName$jscomp$inline_230 +
             "`."
         );
       namesToPlugins[
-        pluginName$jscomp$inline_226
-      ] = pluginModule$jscomp$inline_227;
-      isOrderingDirty$jscomp$inline_225 = !0;
+        pluginName$jscomp$inline_230
+      ] = pluginModule$jscomp$inline_231;
+      isOrderingDirty$jscomp$inline_229 = !0;
     }
   }
-isOrderingDirty$jscomp$inline_225 && recomputePluginOrdering();
+isOrderingDirty$jscomp$inline_229 && recomputePluginOrdering();
 function getInstanceFromInstance(instanceHandle) {
   return instanceHandle;
 }
@@ -2264,7 +2264,7 @@ function enqueueUpdate(fiber, update) {
     ((updateQueue = updateQueue.shared),
     null !== workInProgressRoot &&
     0 !== (fiber.mode & 1) &&
-    0 === (executionContext & 8)
+    0 === (executionContext & 2)
       ? ((fiber = updateQueue.interleaved),
         null === fiber
           ? ((update.next = update),
@@ -3101,60 +3101,49 @@ function ChildReconciler(shouldTrackSideEffects) {
     return iteratorFn;
   }
   return function(returnFiber, currentFirstChild, newChild, lanes) {
-    var isUnkeyedTopLevelFragment =
-      "object" === typeof newChild &&
+    "object" === typeof newChild &&
       null !== newChild &&
       newChild.type === REACT_FRAGMENT_TYPE &&
-      null === newChild.key;
-    isUnkeyedTopLevelFragment && (newChild = newChild.props.children);
+      null === newChild.key &&
+      (newChild = newChild.props.children);
     if ("object" === typeof newChild && null !== newChild) {
       switch (newChild.$$typeof) {
         case REACT_ELEMENT_TYPE:
           a: {
-            var key = newChild.key;
             for (
-              isUnkeyedTopLevelFragment = currentFirstChild;
-              null !== isUnkeyedTopLevelFragment;
+              var key = newChild.key, child = currentFirstChild;
+              null !== child;
 
             ) {
-              if (isUnkeyedTopLevelFragment.key === key) {
+              if (child.key === key) {
                 key = newChild.type;
                 if (key === REACT_FRAGMENT_TYPE) {
-                  if (7 === isUnkeyedTopLevelFragment.tag) {
-                    deleteRemainingChildren(
-                      returnFiber,
-                      isUnkeyedTopLevelFragment.sibling
-                    );
+                  if (7 === child.tag) {
+                    deleteRemainingChildren(returnFiber, child.sibling);
                     currentFirstChild = useFiber(
-                      isUnkeyedTopLevelFragment,
+                      child,
                       newChild.props.children
                     );
                     currentFirstChild.return = returnFiber;
                     returnFiber = currentFirstChild;
                     break a;
                   }
-                } else if (isUnkeyedTopLevelFragment.elementType === key) {
-                  deleteRemainingChildren(
-                    returnFiber,
-                    isUnkeyedTopLevelFragment.sibling
-                  );
-                  currentFirstChild = useFiber(
-                    isUnkeyedTopLevelFragment,
-                    newChild.props
-                  );
+                } else if (child.elementType === key) {
+                  deleteRemainingChildren(returnFiber, child.sibling);
+                  currentFirstChild = useFiber(child, newChild.props);
                   currentFirstChild.ref = coerceRef(
                     returnFiber,
-                    isUnkeyedTopLevelFragment,
+                    child,
                     newChild
                   );
                   currentFirstChild.return = returnFiber;
                   returnFiber = currentFirstChild;
                   break a;
                 }
-                deleteRemainingChildren(returnFiber, isUnkeyedTopLevelFragment);
+                deleteRemainingChildren(returnFiber, child);
                 break;
-              } else deleteChild(returnFiber, isUnkeyedTopLevelFragment);
-              isUnkeyedTopLevelFragment = isUnkeyedTopLevelFragment.sibling;
+              } else deleteChild(returnFiber, child);
+              child = child.sibling;
             }
             newChild.type === REACT_FRAGMENT_TYPE
               ? ((currentFirstChild = createFiberFromFragment(
@@ -3184,12 +3173,8 @@ function ChildReconciler(shouldTrackSideEffects) {
           return placeSingleChild(returnFiber);
         case REACT_PORTAL_TYPE:
           a: {
-            for (
-              isUnkeyedTopLevelFragment = newChild.key;
-              null !== currentFirstChild;
-
-            ) {
-              if (currentFirstChild.key === isUnkeyedTopLevelFragment)
+            for (child = newChild.key; null !== currentFirstChild; ) {
+              if (currentFirstChild.key === child)
                 if (
                   4 === currentFirstChild.tag &&
                   currentFirstChild.stateNode.containerInfo ===
@@ -3241,9 +3226,8 @@ function ChildReconciler(shouldTrackSideEffects) {
         );
       throwOnInvalidObjectType(returnFiber, newChild);
     }
-    if ("string" === typeof newChild || "number" === typeof newChild)
-      return (
-        (newChild = "" + newChild),
+    return "string" === typeof newChild || "number" === typeof newChild
+      ? ((newChild = "" + newChild),
         null !== currentFirstChild && 6 === currentFirstChild.tag
           ? (deleteRemainingChildren(returnFiber, currentFirstChild.sibling),
             (currentFirstChild = useFiber(currentFirstChild, newChild)),
@@ -3257,20 +3241,8 @@ function ChildReconciler(shouldTrackSideEffects) {
             )),
             (currentFirstChild.return = returnFiber),
             (returnFiber = currentFirstChild)),
-        placeSingleChild(returnFiber)
-      );
-    if ("undefined" === typeof newChild && !isUnkeyedTopLevelFragment)
-      switch (returnFiber.tag) {
-        case 1:
-        case 0:
-        case 11:
-        case 15:
-          throw Error(
-            (getComponentNameFromFiber(returnFiber) || "Component") +
-              "(...): Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null."
-          );
-      }
-    return deleteRemainingChildren(returnFiber, currentFirstChild);
+        placeSingleChild(returnFiber))
+      : deleteRemainingChildren(returnFiber, currentFirstChild);
   };
 }
 var reconcileChildFibers = ChildReconciler(!0),
@@ -3825,7 +3797,7 @@ function dispatchAction(fiber, queue, action) {
     if (
       null !== workInProgressRoot &&
       0 !== (fiber.mode & 1) &&
-      0 === (executionContext & 8)
+      0 === (executionContext & 2)
     ) {
       var interleaved = queue.interleaved;
       null === interleaved
@@ -4683,7 +4655,6 @@ function updateSuspenseComponent(current, workInProgress, renderLanes) {
   JSCompiler_temp
     ? ((showFallback = !0), (workInProgress.flags &= -129))
     : (null !== current && null === current.memoizedState) ||
-      void 0 === nextProps.fallback ||
       !0 === nextProps.unstable_avoidThisFallback ||
       (suspenseContext |= 1);
   push(suspenseStackCursor, suspenseContext & 1);
@@ -5059,32 +5030,16 @@ appendAllChildren = function(
       if (needsVisibilityToggle && isHidden)
         throw Error("Not yet implemented.");
       appendChildNode(parent.node, instance.node);
-    } else if (4 !== node.tag) {
-      if (
-        13 === node.tag &&
-        0 !== (node.flags & 4) &&
-        (instance = null !== node.memoizedState)
-      ) {
-        var primaryChildParent = node.child;
-        if (
-          null !== primaryChildParent &&
-          (null !== primaryChildParent.child &&
-            ((primaryChildParent.child.return = primaryChildParent),
-            appendAllChildren(parent, primaryChildParent, !0, instance)),
-          (instance = primaryChildParent.sibling),
-          null !== instance)
-        ) {
-          instance.return = node;
-          node = instance;
-          continue;
-        }
-      }
-      if (null !== node.child) {
+    } else if (4 !== node.tag)
+      if (22 === node.tag && null !== node.memoizedState)
+        (instance = node.child),
+          null !== instance && (instance.return = node),
+          appendAllChildren(parent, node, !0, !0);
+      else if (null !== node.child) {
         node.child.return = node;
         node = node.child;
         continue;
       }
-    }
     if (node === workInProgress) break;
     for (; null === node.sibling; ) {
       if (null === node.return || node.return === workInProgress) return;
@@ -5112,37 +5067,16 @@ function appendAllChildrenToContainer(
       if (needsVisibilityToggle && isHidden)
         throw Error("Not yet implemented.");
       appendChildNodeToSet(containerChildSet, instance.node);
-    } else if (4 !== node.tag) {
-      if (
-        13 === node.tag &&
-        0 !== (node.flags & 4) &&
-        (instance = null !== node.memoizedState)
-      ) {
-        var primaryChildParent = node.child;
-        if (
-          null !== primaryChildParent &&
-          (null !== primaryChildParent.child &&
-            ((primaryChildParent.child.return = primaryChildParent),
-            appendAllChildrenToContainer(
-              containerChildSet,
-              primaryChildParent,
-              !0,
-              instance
-            )),
-          (instance = primaryChildParent.sibling),
-          null !== instance)
-        ) {
-          instance.return = node;
-          node = instance;
-          continue;
-        }
-      }
-      if (null !== node.child) {
+    } else if (4 !== node.tag)
+      if (22 === node.tag && null !== node.memoizedState)
+        (instance = node.child),
+          null !== instance && (instance.return = node),
+          appendAllChildrenToContainer(containerChildSet, node, !0, !0);
+      else if (null !== node.child) {
         node.child.return = node;
         node = node.child;
         continue;
       }
-    }
     if (node === workInProgress) break;
     for (; null === node.sibling; ) {
       if (null === node.return || node.return === workInProgress) return;
@@ -5427,7 +5361,11 @@ function completeWork(current, workInProgress, renderLanes) {
       newProps = null !== newProps;
       renderLanes = !1;
       null !== current && (renderLanes = null !== current.memoizedState);
-      if (newProps && !renderLanes && 0 !== (workInProgress.mode & 1))
+      if (
+        newProps &&
+        !renderLanes &&
+        ((workInProgress.child.flags |= 4096), 0 !== (workInProgress.mode & 1))
+      )
         if (
           (null === current &&
             !0 !== workInProgress.memoizedProps.unstable_avoidThisFallback) ||
@@ -5449,7 +5387,7 @@ function completeWork(current, workInProgress, renderLanes) {
               workInProgressRootRenderLanes
             );
         }
-      newProps && (workInProgress.flags |= 4);
+      null !== workInProgress.updateQueue && (workInProgress.flags |= 4);
       bubbleProperties(workInProgress);
       0 !== (workInProgress.mode & 2) &&
         newProps &&
@@ -5608,11 +5546,12 @@ function completeWork(current, workInProgress, renderLanes) {
         null !== current &&
           (null !== current.memoizedState) !== renderLanes &&
           "unstable-defer-without-hiding" !== newProps.mode &&
-          (workInProgress.flags |= 4),
-        (renderLanes &&
-          0 === (subtreeRenderLanes & 1073741824) &&
-          0 !== (workInProgress.mode & 1)) ||
-          bubbleProperties(workInProgress),
+          23 !== workInProgress.tag &&
+          (workInProgress.flags |= 4096),
+        renderLanes && 0 !== (workInProgress.mode & 1)
+          ? 0 !== (subtreeRenderLanes & 1073741824) &&
+            bubbleProperties(workInProgress)
+          : bubbleProperties(workInProgress),
         null
       );
   }
@@ -5830,8 +5769,6 @@ function commitWork(current, finishedWork) {
     case 12:
       return;
     case 13:
-      null !== finishedWork.memoizedState &&
-        (globalMostRecentFallbackTime = now());
       attachSuspenseRetryListeners(finishedWork);
       return;
     case 19:
@@ -6003,6 +5940,15 @@ function commitMutationEffects(root, firstChild, committedLanes) {
                 else currentRef.current = null;
             }
           }
+          if (flags & 4096)
+            switch (root.tag) {
+              case 13:
+                if (null !== root.memoizedState) {
+                  var current$94 = root.alternate;
+                  if (null === current$94 || null === current$94.memoizedState)
+                    globalMostRecentFallbackTime = now();
+                }
+            }
           switch (flags & 2054) {
             case 2:
               root.flags &= -3;
@@ -6042,16 +5988,16 @@ function commitLayoutEffects(finishedWork, root, committedLanes) {
     if (
       ((root = nextEffect),
       (committedLanes = root.child),
-      0 !== (root.subtreeFlags & 324) && null !== committedLanes)
+      0 !== (root.subtreeFlags & 4420) && null !== committedLanes)
     )
       (committedLanes.return = root), (nextEffect = committedLanes);
     else
       for (root = finishedWork; null !== nextEffect; ) {
         committedLanes = nextEffect;
-        if (0 !== (committedLanes.flags & 324)) {
+        if (0 !== (committedLanes.flags & 4420)) {
           var current = committedLanes.alternate;
           try {
-            if (0 !== (committedLanes.flags & 68))
+            if (0 !== (committedLanes.flags & 4420))
               switch (committedLanes.tag) {
                 case 0:
                 case 11:
@@ -6261,7 +6207,7 @@ var ceil = Math.ceil,
   currentEventTime = -1,
   currentEventTransitionLane = 0;
 function requestEventTime() {
-  return 0 !== (executionContext & 24)
+  return 0 !== (executionContext & 6)
     ? now()
     : -1 !== currentEventTime
     ? currentEventTime
@@ -6269,7 +6215,7 @@ function requestEventTime() {
 }
 function requestUpdateLane(fiber) {
   if (0 === (fiber.mode & 1)) return 1;
-  if (0 !== (executionContext & 8) && 0 !== workInProgressRootRenderLanes)
+  if (0 !== (executionContext & 2) && 0 !== workInProgressRootRenderLanes)
     return workInProgressRootRenderLanes & -workInProgressRootRenderLanes;
   if (0 !== ReactCurrentBatchConfig.transition)
     return (
@@ -6308,18 +6254,15 @@ function scheduleUpdateOnFiber(fiber, lane, eventTime) {
   isDevToolsPresent && addFiberToLanesMap(root, fiber, lane);
   markRootUpdated(root, lane, eventTime);
   root === workInProgressRoot &&
-    (0 === (executionContext & 8) && (workInProgressRootUpdatedLanes |= lane),
+    (0 === (executionContext & 2) && (workInProgressRootUpdatedLanes |= lane),
     4 === workInProgressRootExitStatus &&
       markRootSuspended$1(root, workInProgressRootRenderLanes));
-  1 === lane
-    ? 0 !== (executionContext & 4) && 0 === (executionContext & 24)
-      ? performSyncWorkOnRoot(root)
-      : (ensureRootIsScheduled(root, eventTime),
-        0 === executionContext &&
-          0 === (fiber.mode & 1) &&
-          ((workInProgressRootRenderTargetTime = now() + 500),
-          includesLegacySyncCallbacks && flushSyncCallbacks()))
-    : ensureRootIsScheduled(root, eventTime);
+  ensureRootIsScheduled(root, eventTime);
+  1 === lane &&
+    0 === executionContext &&
+    0 === (fiber.mode & 1) &&
+    ((workInProgressRootRenderTargetTime = now() + 500),
+    includesLegacySyncCallbacks && flushSyncCallbacks());
   return root;
 }
 function markUpdateLaneFromFiberToRoot(sourceFiber, lane) {
@@ -6410,7 +6353,7 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
   nestedUpdateScheduled = currentUpdateIsNested = !1;
   currentEventTime = -1;
   currentEventTransitionLane = 0;
-  if (0 !== (executionContext & 24))
+  if (0 !== (executionContext & 6))
     throw Error("Should not already be working.");
   var originalCallbackNode = root.callbackNode;
   if (flushPassiveEffects() && root.callbackNode !== originalCallbackNode)
@@ -6429,7 +6372,7 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
   if (JSCompiler_inline_result && !didTimeout) {
     didTimeout = lanes;
     JSCompiler_inline_result = executionContext;
-    executionContext |= 8;
+    executionContext |= 2;
     var prevDispatcher = pushDispatcher();
     if (
       workInProgressRoot !== root ||
@@ -6464,12 +6407,14 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
   } else didTimeout = renderRootSync(root, lanes);
   if (0 !== didTimeout) {
     2 === didTimeout &&
-      ((executionContext |= 32),
+      ((JSCompiler_inline_result = executionContext),
+      (executionContext |= 8),
       root.hydrate && ((root.hydrate = !1), shim(root.containerInfo)),
-      (JSCompiler_inline_result = getLanesToRetrySynchronouslyOnError(root)),
-      0 !== JSCompiler_inline_result &&
-        ((lanes = JSCompiler_inline_result),
-        (didTimeout = renderRootSync(root, JSCompiler_inline_result))));
+      (prevDispatcher = getLanesToRetrySynchronouslyOnError(root)),
+      0 !== prevDispatcher &&
+        ((lanes = prevDispatcher),
+        (didTimeout = renderRootSync(root, prevDispatcher))),
+      (executionContext = JSCompiler_inline_result));
     if (1 === didTimeout)
       throw ((originalCallbackNode = workInProgressRootFatalError),
       prepareFreshStack(root, 0),
@@ -6570,18 +6515,20 @@ function markRootSuspended$1(root, suspendedLanes) {
 function performSyncWorkOnRoot(root) {
   currentUpdateIsNested = nestedUpdateScheduled;
   nestedUpdateScheduled = !1;
-  if (0 !== (executionContext & 24))
+  if (0 !== (executionContext & 6))
     throw Error("Should not already be working.");
   flushPassiveEffects();
   var lanes = getNextLanes(root, 0);
   if (0 === (lanes & 1)) return ensureRootIsScheduled(root, now()), null;
   var exitStatus = renderRootSync(root, lanes);
   if (0 !== root.tag && 2 === exitStatus) {
-    executionContext |= 32;
+    var prevExecutionContext = executionContext;
+    executionContext |= 8;
     root.hydrate && ((root.hydrate = !1), shim(root.containerInfo));
     var errorRetryLanes = getLanesToRetrySynchronouslyOnError(root);
     0 !== errorRetryLanes &&
       ((lanes = errorRetryLanes), (exitStatus = renderRootSync(root, lanes)));
+    executionContext = prevExecutionContext;
   }
   if (1 === exitStatus)
     throw ((exitStatus = workInProgressRootFatalError),
@@ -6732,19 +6679,17 @@ function handleError(root$jscomp$0, thrownValue) {
             var JSCompiler_temp;
             if ((JSCompiler_temp = 13 === workInProgress$32.tag)) {
               var nextState = workInProgress$32.memoizedState;
-              if (null !== nextState)
-                JSCompiler_temp = null !== nextState.dehydrated ? !0 : !1;
-              else {
-                var props = workInProgress$32.memoizedProps;
-                JSCompiler_temp =
-                  void 0 === props.fallback
-                    ? !1
-                    : !0 !== props.unstable_avoidThisFallback
+              JSCompiler_temp =
+                null !== nextState
+                  ? null !== nextState.dehydrated
                     ? !0
-                    : hasInvisibleParentBoundary
-                    ? !1
-                    : !0;
-              }
+                    : !1
+                  : !0 !==
+                    workInProgress$32.memoizedProps.unstable_avoidThisFallback
+                  ? !0
+                  : hasInvisibleParentBoundary
+                  ? !1
+                  : !0;
             }
             if (JSCompiler_temp) {
               var wakeables = workInProgress$32.updateQueue;
@@ -6865,7 +6810,7 @@ function pushDispatcher() {
 }
 function renderRootSync(root, lanes) {
   var prevExecutionContext = executionContext;
-  executionContext |= 8;
+  executionContext |= 2;
   var prevDispatcher = pushDispatcher();
   if (workInProgressRoot !== root || workInProgressRootRenderLanes !== lanes) {
     if (isDevToolsPresent) {
@@ -6980,7 +6925,7 @@ function commitRoot(root) {
 function commitRootImpl(root, renderPriorityLevel) {
   do flushPassiveEffects();
   while (null !== rootWithPendingPassiveEffects);
-  if (0 !== (executionContext & 24))
+  if (0 !== (executionContext & 6))
     throw Error("Should not already be working.");
   var finishedWork = root.finishedWork,
     lanes = root.finishedLanes;
@@ -7013,7 +6958,7 @@ function commitRootImpl(root, renderPriorityLevel) {
     var previousPriority = currentUpdatePriority;
     currentUpdatePriority = 1;
     var prevExecutionContext = executionContext;
-    executionContext |= 16;
+    executionContext |= 4;
     ReactCurrentOwner$2.current = null;
     commitBeforeMutationEffects(root, finishedWork);
     commitTime = now$1();
@@ -7045,7 +6990,6 @@ function commitRootImpl(root, renderPriorityLevel) {
     (root = firstUncaughtError),
     (firstUncaughtError = null),
     root);
-  if (0 !== (executionContext & 4)) return null;
   0 !== (pendingPassiveEffectsLanes & 1) &&
     0 !== root.tag &&
     flushPassiveEffects();
@@ -7066,10 +7010,10 @@ function flushPassiveEffects() {
         renderPriority = rootWithPendingPassiveEffects;
         rootWithPendingPassiveEffects = null;
         pendingPassiveEffectsLanes = 0;
-        if (0 !== (executionContext & 24))
+        if (0 !== (executionContext & 6))
           throw Error("Cannot flush passive effects while already rendering.");
         var prevExecutionContext = executionContext;
-        executionContext |= 16;
+        executionContext |= 4;
         for (nextEffect = renderPriority.current; null !== nextEffect; ) {
           var fiber = nextEffect,
             child = fiber.child;
@@ -8173,6 +8117,95 @@ function updateContainer(element, container, parentComponent, callback) {
 function emptyFindFiberByHostInstance() {
   return null;
 }
+var emptyObject$1 = {},
+  createHierarchy,
+  getHostNode,
+  getHostProps,
+  lastNonHostInstance,
+  getOwnerHierarchy,
+  traverseOwnerTreeUp;
+createHierarchy = function(fiberHierarchy) {
+  return fiberHierarchy.map(function(fiber) {
+    return {
+      name: getComponentNameFromType(fiber.type),
+      getInspectorData: function(findNodeHandle) {
+        return {
+          props: getHostProps(fiber),
+          source: fiber._debugSource,
+          measure: function(callback) {
+            var hostFiber = findCurrentHostFiber(fiber);
+            if (
+              (hostFiber =
+                null != hostFiber &&
+                null !== hostFiber.stateNode &&
+                hostFiber.stateNode.node)
+            )
+              nativeFabricUIManager.measure(hostFiber, callback);
+            else
+              return ReactNativePrivateInterface.UIManager.measure(
+                getHostNode(fiber, findNodeHandle),
+                callback
+              );
+          }
+        };
+      }
+    };
+  });
+};
+getHostNode = function(fiber, findNodeHandle) {
+  for (var hostNode; fiber; ) {
+    null !== fiber.stateNode &&
+      5 === fiber.tag &&
+      (hostNode = findNodeHandle(fiber.stateNode));
+    if (hostNode) return hostNode;
+    fiber = fiber.child;
+  }
+  return null;
+};
+getHostProps = function(fiber) {
+  return (fiber = findCurrentHostFiber(fiber))
+    ? fiber.memoizedProps || emptyObject$1
+    : emptyObject$1;
+};
+exports.getInspectorDataForInstance = function(closestInstance) {
+  if (!closestInstance)
+    return {
+      hierarchy: [],
+      props: emptyObject$1,
+      selectedIndex: null,
+      source: null
+    };
+  closestInstance = findCurrentFiberUsingSlowPath(closestInstance);
+  var fiberHierarchy = getOwnerHierarchy(closestInstance),
+    instance = lastNonHostInstance(fiberHierarchy);
+  closestInstance = createHierarchy(fiberHierarchy);
+  var props = getHostProps(instance),
+    source = instance._debugSource;
+  fiberHierarchy = fiberHierarchy.indexOf(instance);
+  return {
+    hierarchy: closestInstance,
+    props: props,
+    selectedIndex: fiberHierarchy,
+    source: source
+  };
+};
+getOwnerHierarchy = function(instance) {
+  var hierarchy = [];
+  traverseOwnerTreeUp(hierarchy, instance);
+  return hierarchy;
+};
+lastNonHostInstance = function(hierarchy) {
+  for (var i = hierarchy.length - 1; 1 < i; i--) {
+    var instance = hierarchy[i];
+    if (5 !== instance.tag) return instance;
+  }
+  return hierarchy[0];
+};
+traverseOwnerTreeUp = function(hierarchy, instance) {
+  instance &&
+    (hierarchy.unshift(instance),
+    traverseOwnerTreeUp(hierarchy, instance._debugOwner));
+};
 function findNodeHandle(componentOrHandle) {
   if (null == componentOrHandle) return null;
   if ("number" === typeof componentOrHandle) return componentOrHandle;
@@ -8199,10 +8232,10 @@ batchedUpdatesImpl = function(fn, a) {
   }
 };
 var roots = new Map(),
-  devToolsConfig$jscomp$inline_969 = {
+  devToolsConfig$jscomp$inline_979 = {
     findFiberByHostInstance: getInstanceFromInstance,
     bundleType: 0,
-    version: "18.0.0-cae635054-20210626",
+    version: "18.0.0-419cc9c37-20210726",
     rendererPackageName: "react-native-renderer",
     rendererConfig: {
       getInspectorDataForViewTag: function() {
@@ -8217,11 +8250,11 @@ var roots = new Map(),
       }.bind(null, findNodeHandle)
     }
   };
-var internals$jscomp$inline_1227 = {
-  bundleType: devToolsConfig$jscomp$inline_969.bundleType,
-  version: devToolsConfig$jscomp$inline_969.version,
-  rendererPackageName: devToolsConfig$jscomp$inline_969.rendererPackageName,
-  rendererConfig: devToolsConfig$jscomp$inline_969.rendererConfig,
+var internals$jscomp$inline_1236 = {
+  bundleType: devToolsConfig$jscomp$inline_979.bundleType,
+  version: devToolsConfig$jscomp$inline_979.version,
+  rendererPackageName: devToolsConfig$jscomp$inline_979.rendererPackageName,
+  rendererConfig: devToolsConfig$jscomp$inline_979.rendererConfig,
   overrideHookState: null,
   overrideHookStateDeletePath: null,
   overrideHookStateRenamePath: null,
@@ -8237,26 +8270,26 @@ var internals$jscomp$inline_1227 = {
     return null === fiber ? null : fiber.stateNode;
   },
   findFiberByHostInstance:
-    devToolsConfig$jscomp$inline_969.findFiberByHostInstance ||
+    devToolsConfig$jscomp$inline_979.findFiberByHostInstance ||
     emptyFindFiberByHostInstance,
   findHostInstancesForRefresh: null,
   scheduleRefresh: null,
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "18.0.0-cae635054-20210626"
+  reconcilerVersion: "18.0.0-419cc9c37-20210726"
 };
 if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
-  var hook$jscomp$inline_1228 = __REACT_DEVTOOLS_GLOBAL_HOOK__;
+  var hook$jscomp$inline_1237 = __REACT_DEVTOOLS_GLOBAL_HOOK__;
   if (
-    !hook$jscomp$inline_1228.isDisabled &&
-    hook$jscomp$inline_1228.supportsFiber
+    !hook$jscomp$inline_1237.isDisabled &&
+    hook$jscomp$inline_1237.supportsFiber
   )
     try {
-      (rendererID = hook$jscomp$inline_1228.inject(
-        internals$jscomp$inline_1227
+      (rendererID = hook$jscomp$inline_1237.inject(
+        internals$jscomp$inline_1236
       )),
-        (injectedHook = hook$jscomp$inline_1228);
+        (injectedHook = hook$jscomp$inline_1237);
     } catch (err) {}
 }
 exports.createPortal = function(children, containerTag) {
@@ -8269,12 +8302,10 @@ exports.createPortal = function(children, containerTag) {
 };
 exports.dispatchCommand = function(handle, command, args) {
   null != handle._nativeTag &&
-    (handle._internalInstanceHandle
-      ? nativeFabricUIManager.dispatchCommand(
-          handle._internalInstanceHandle.stateNode.node,
-          command,
-          args
-        )
+    (null != handle._internalInstanceHandle
+      ? ((handle = handle._internalInstanceHandle.stateNode),
+        null != handle &&
+          nativeFabricUIManager.dispatchCommand(handle.node, command, args))
       : ReactNativePrivateInterface.UIManager.dispatchViewManagerCommand(
           handle._nativeTag,
           command,
@@ -8322,11 +8353,10 @@ exports.render = function(element, containerTag, callback, concurrentRoot) {
 };
 exports.sendAccessibilityEvent = function(handle, eventType) {
   null != handle._nativeTag &&
-    (handle._internalInstanceHandle
-      ? nativeFabricUIManager.sendAccessibilityEvent(
-          handle._internalInstanceHandle.stateNode.node,
-          eventType
-        )
+    (null != handle._internalInstanceHandle
+      ? ((handle = handle._internalInstanceHandle.stateNode),
+        null != handle &&
+          nativeFabricUIManager.sendAccessibilityEvent(handle.node, eventType))
       : ReactNativePrivateInterface.legacySendAccessibilityEvent(
           handle._nativeTag,
           eventType
diff --git a/Libraries/Renderer/implementations/ReactNativeRenderer-dev.fb.js b/Libraries/Renderer/implementations/ReactNativeRenderer-dev.fb.js
index ad0232aa483461..9d63f703e0da4d 100644
--- a/Libraries/Renderer/implementations/ReactNativeRenderer-dev.fb.js
+++ b/Libraries/Renderer/implementations/ReactNativeRenderer-dev.fb.js
@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<4167a4b8fd3fe6a1e0fe7e90131522e1>>
+ * @generated SignedSource<<cecbd2d9831f9893e930d4f7a95a35cf>>
  */
 
 'use strict';
@@ -2534,6 +2534,7 @@ function updateFiberProps(tag, props) {
 var batchedUpdatesImpl = function(fn, bookkeeping) {
   return fn(bookkeeping);
 };
+
 var isInsideEventHandler = false;
 function batchedUpdates(fn, bookkeeping) {
   if (isInsideEventHandler) {
@@ -2550,11 +2551,7 @@ function batchedUpdates(fn, bookkeeping) {
     isInsideEventHandler = false;
   }
 }
-function setBatchingImplementation(
-  _batchedUpdatesImpl,
-  _discreteUpdatesImpl,
-  _batchedEventUpdatesImpl
-) {
+function setBatchingImplementation(_batchedUpdatesImpl, _discreteUpdatesImpl) {
   batchedUpdatesImpl = _batchedUpdatesImpl;
 }
 
@@ -3235,7 +3232,7 @@ var MutationMask =
   Ref |
   Hydrating |
   Visibility;
-var LayoutMask = Update | Callback | Ref; // TODO: Split into PassiveMountMask and PassiveUnmountMask
+var LayoutMask = Update | Callback | Ref | Visibility; // TODO: Split into PassiveMountMask and PassiveUnmountMask
 
 var PassiveMask = Passive | ChildDeletion; // Union of tags that don't get reset on clones.
 // This allows certain concepts to persist without recalculting them,
@@ -4160,9 +4157,15 @@ function injectInternals(internals) {
     {
       error("React instrumentation encountered an error: %s.", err);
     }
-  } // DevTools exists
+  }
 
-  return true;
+  if (hook.checkDCE) {
+    // This is the real DevTools.
+    return true;
+  } else {
+    // This is likely a hook installed by Fast Refresh runtime.
+    return false;
+  }
 }
 function onScheduleRoot(root, children) {
   {
@@ -6128,7 +6131,7 @@ var Passive$1 =
   /*   */
   4;
 
-var ReactVersion = "18.0.0-cae635054-20210626";
+var ReactVersion = "18.0.0-419cc9c37-20210726";
 
 var ReactCurrentBatchConfig = ReactSharedInternals.ReactCurrentBatchConfig;
 var NoTransition = 0;
@@ -9843,38 +9846,6 @@ function ChildReconciler(shouldTrackSideEffects) {
       if (typeof newChild === "function") {
         warnOnFunctionType(returnFiber);
       }
-    }
-
-    if (typeof newChild === "undefined" && !isUnkeyedTopLevelFragment) {
-      // If the new child is undefined, and the return fiber is a composite
-      // component, throw an error. If Fiber return types are disabled,
-      // we already threw above.
-      switch (returnFiber.tag) {
-        case ClassComponent: {
-          {
-            var instance = returnFiber.stateNode;
-
-            if (instance.render._isMockFunction) {
-              // We allow auto-mocks to proceed as if they're returning null.
-              break;
-            }
-          }
-        }
-        // Intentionally fall through to the next case, which handles both
-        // functions and classes
-        // eslint-disable-next-lined no-fallthrough
-
-        case FunctionComponent:
-        case ForwardRef:
-        case SimpleMemoComponent: {
-          {
-            throw Error(
-              (getComponentNameFromFiber(returnFiber) || "Component") +
-                "(...): Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null."
-            );
-          }
-        }
-      }
     } // Remaining cases are all treated as empty.
 
     return deleteRemainingChildren(returnFiber, currentFirstChild);
@@ -10047,11 +10018,7 @@ function shouldCaptureSuspense(workInProgress, hasInvisibleParent) {
     return false;
   }
 
-  var props = workInProgress.memoizedProps; // In order to capture, the Suspense component must have a fallback prop.
-
-  if (props.fallback === undefined) {
-    return false;
-  } // Regular boundaries always capture.
+  var props = workInProgress.memoizedProps; // Regular boundaries always capture.
 
   if (props.unstable_avoidThisFallback !== true) {
     return true;
@@ -14616,12 +14583,8 @@ function updateSuspenseComponent(current, workInProgress, renderLanes) {
       // This is a new mount or this boundary is already showing a fallback state.
       // Mark this subtree context as having at least one invisible parent that could
       // handle the fallback state.
-      // Boundaries without fallbacks or should be avoided are not considered since
-      // they cannot handle preferred fallback states.
-      if (
-        nextProps.fallback !== undefined &&
-        nextProps.unstable_avoidThisFallback !== true
-      ) {
+      // Avoided boundaries are not considered since they cannot handle preferred fallback states.
+      if (nextProps.unstable_avoidThisFallback !== true) {
         suspenseContext = addSubtreeSuspenseContext(
           suspenseContext,
           InvisibleParentSuspenseContext
@@ -14655,11 +14618,6 @@ function updateSuspenseComponent(current, workInProgress, renderLanes) {
   // a stack.
 
   if (current === null) {
-    // Initial mount
-    // If we're currently hydrating, try to hydrate this boundary.
-    // But only if this has a fallback.
-    if (nextProps.fallback !== undefined);
-
     var nextPrimaryChildren = nextProps.children;
     var nextFallbackChildren = nextProps.fallback;
 
@@ -16544,17 +16502,28 @@ function completeWork(current, workInProgress, renderLanes) {
       var nextDidTimeout = nextState !== null;
       var prevDidTimeout = false;
 
-      if (current === null) {
-        if (workInProgress.memoizedProps.fallback !== undefined);
-      } else {
+      if (current === null);
+      else {
         var prevState = current.memoizedState;
         prevDidTimeout = prevState !== null;
-      }
+      } // If the suspended state of the boundary changes, we need to schedule
+      // an effect to toggle the subtree's visibility. When we switch from
+      // fallback -> primary, the inner Offscreen fiber schedules this effect
+      // as part of its normal complete phase. But when we switch from
+      // primary -> fallback, the inner Offscreen fiber does not have a complete
+      // phase. So we need to schedule its effect here.
+      //
+      // We also use this flag to connect/disconnect the effects, but the same
+      // logic applies: when re-connecting, the Offscreen fiber's complete
+      // phase will handle scheduling the effect. It's only when the fallback
+      // is active that we have to do anything special.
 
       if (nextDidTimeout && !prevDidTimeout) {
-        // TODO: This will still suspend a synchronous tree if anything
+        var offscreenFiber = workInProgress.child;
+        offscreenFiber.flags |= Visibility; // TODO: This will still suspend a synchronous tree if anything
         // in the concurrent tree already suspended during this render.
         // This is a known bug.
+
         if ((workInProgress.mode & ConcurrentMode) !== NoMode) {
           // TODO: Move this back to throwException because this is too late
           // if this is a large tree which is common for initial loads. We
@@ -16585,16 +16554,12 @@ function completeWork(current, workInProgress, renderLanes) {
         }
       }
 
-      {
-        // TODO: Only schedule updates if these values are non equal, i.e. it changed.
-        if (nextDidTimeout || prevDidTimeout) {
-          // If this boundary just timed out, schedule an effect to attach a
-          // retry listener to the promise. This flag is also used to hide the
-          // primary children. In mutation mode, we also need the flag to
-          // *unhide* children that were previously hidden, so check if this
-          // is currently timed out, too.
-          workInProgress.flags |= Update;
-        }
+      var wakeables = workInProgress.updateQueue;
+
+      if (wakeables !== null) {
+        // Schedule an effect to attach a retry listener to the promise.
+        // TODO: Move to passive phase
+        workInProgress.flags |= Update;
       }
 
       bubbleProperties(workInProgress);
@@ -16873,18 +16838,34 @@ function completeWork(current, workInProgress, renderLanes) {
 
         if (
           prevIsHidden !== nextIsHidden &&
-          newProps.mode !== "unstable-defer-without-hiding"
+          newProps.mode !== "unstable-defer-without-hiding" && // LegacyHidden doesn't do any hiding — it only pre-renders.
+          workInProgress.tag !== LegacyHiddenComponent
         ) {
-          workInProgress.flags |= Update;
+          workInProgress.flags |= Visibility;
         }
-      } // Don't bubble properties for hidden children.
+      }
 
-      if (
-        !nextIsHidden ||
-        includesSomeLane(subtreeRenderLanes, OffscreenLane) ||
-        (workInProgress.mode & ConcurrentMode) === NoMode
-      ) {
+      if (!nextIsHidden || (workInProgress.mode & ConcurrentMode) === NoMode) {
         bubbleProperties(workInProgress);
+      } else {
+        // Don't bubble properties for hidden children unless we're rendering
+        // at offscreen priority.
+        if (includesSomeLane(subtreeRenderLanes, OffscreenLane)) {
+          bubbleProperties(workInProgress);
+
+          {
+            // Check if there was an insertion or update in the hidden subtree.
+            // If so, we need to hide those nodes in the commit phase, so
+            // schedule a visibility effect.
+            if (
+              workInProgress.tag !== LegacyHiddenComponent &&
+              workInProgress.subtreeFlags & (Placement | Update) &&
+              newProps.mode !== "unstable-defer-without-hiding"
+            ) {
+              workInProgress.flags |= Visibility;
+            }
+          }
+        }
       }
 
       return null;
@@ -17441,24 +17422,26 @@ function commitLayoutEffectOnFiber(
   finishedWork,
   committedLanes
 ) {
-  if ((finishedWork.flags & (Update | Callback)) !== NoFlags) {
+  if ((finishedWork.flags & LayoutMask) !== NoFlags) {
     switch (finishedWork.tag) {
       case FunctionComponent:
       case ForwardRef:
       case SimpleMemoComponent: {
-        // At this point layout effects have already been destroyed (during mutation phase).
-        // This is done to prevent sibling component effects from interfering with each other,
-        // e.g. a destroy function in one component should never override a ref set
-        // by a create function in another component during the same commit.
-        if (finishedWork.mode & ProfileMode) {
-          try {
-            startLayoutEffectTimer();
+        {
+          // At this point layout effects have already been destroyed (during mutation phase).
+          // This is done to prevent sibling component effects from interfering with each other,
+          // e.g. a destroy function in one component should never override a ref set
+          // by a create function in another component during the same commit.
+          if (finishedWork.mode & ProfileMode) {
+            try {
+              startLayoutEffectTimer();
+              commitHookEffectListMount(Layout | HasEffect, finishedWork);
+            } finally {
+              recordLayoutEffectDuration(finishedWork);
+            }
+          } else {
             commitHookEffectListMount(Layout | HasEffect, finishedWork);
-          } finally {
-            recordLayoutEffectDuration(finishedWork);
           }
-        } else {
-          commitHookEffectListMount(Layout | HasEffect, finishedWork);
         }
 
         break;
@@ -17468,104 +17451,109 @@ function commitLayoutEffectOnFiber(
         var instance = finishedWork.stateNode;
 
         if (finishedWork.flags & Update) {
-          if (current === null) {
-            // We could update instance props and state here,
-            // but instead we rely on them being set during last render.
-            // TODO: revisit this when we implement resuming.
-            {
-              if (
-                finishedWork.type === finishedWork.elementType &&
-                !didWarnAboutReassigningProps
-              ) {
-                if (instance.props !== finishedWork.memoizedProps) {
-                  error(
-                    "Expected %s props to match memoized props before " +
-                      "componentDidMount. " +
-                      "This might either be because of a bug in React, or because " +
-                      "a component reassigns its own `this.props`. " +
-                      "Please file an issue.",
-                    getComponentNameFromFiber(finishedWork) || "instance"
-                  );
-                }
+          {
+            if (current === null) {
+              // We could update instance props and state here,
+              // but instead we rely on them being set during last render.
+              // TODO: revisit this when we implement resuming.
+              {
+                if (
+                  finishedWork.type === finishedWork.elementType &&
+                  !didWarnAboutReassigningProps
+                ) {
+                  if (instance.props !== finishedWork.memoizedProps) {
+                    error(
+                      "Expected %s props to match memoized props before " +
+                        "componentDidMount. " +
+                        "This might either be because of a bug in React, or because " +
+                        "a component reassigns its own `this.props`. " +
+                        "Please file an issue.",
+                      getComponentNameFromFiber(finishedWork) || "instance"
+                    );
+                  }
 
-                if (instance.state !== finishedWork.memoizedState) {
-                  error(
-                    "Expected %s state to match memoized state before " +
-                      "componentDidMount. " +
-                      "This might either be because of a bug in React, or because " +
-                      "a component reassigns its own `this.state`. " +
-                      "Please file an issue.",
-                    getComponentNameFromFiber(finishedWork) || "instance"
-                  );
+                  if (instance.state !== finishedWork.memoizedState) {
+                    error(
+                      "Expected %s state to match memoized state before " +
+                        "componentDidMount. " +
+                        "This might either be because of a bug in React, or because " +
+                        "a component reassigns its own `this.state`. " +
+                        "Please file an issue.",
+                      getComponentNameFromFiber(finishedWork) || "instance"
+                    );
+                  }
                 }
               }
-            }
 
-            if (finishedWork.mode & ProfileMode) {
-              try {
-                startLayoutEffectTimer();
+              if (finishedWork.mode & ProfileMode) {
+                try {
+                  startLayoutEffectTimer();
+                  instance.componentDidMount();
+                } finally {
+                  recordLayoutEffectDuration(finishedWork);
+                }
+              } else {
                 instance.componentDidMount();
-              } finally {
-                recordLayoutEffectDuration(finishedWork);
               }
             } else {
-              instance.componentDidMount();
-            }
-          } else {
-            var prevProps =
-              finishedWork.elementType === finishedWork.type
-                ? current.memoizedProps
-                : resolveDefaultProps(finishedWork.type, current.memoizedProps);
-            var prevState = current.memoizedState; // We could update instance props and state here,
-            // but instead we rely on them being set during last render.
-            // TODO: revisit this when we implement resuming.
+              var prevProps =
+                finishedWork.elementType === finishedWork.type
+                  ? current.memoizedProps
+                  : resolveDefaultProps(
+                      finishedWork.type,
+                      current.memoizedProps
+                    );
+              var prevState = current.memoizedState; // We could update instance props and state here,
+              // but instead we rely on them being set during last render.
+              // TODO: revisit this when we implement resuming.
 
-            {
-              if (
-                finishedWork.type === finishedWork.elementType &&
-                !didWarnAboutReassigningProps
-              ) {
-                if (instance.props !== finishedWork.memoizedProps) {
-                  error(
-                    "Expected %s props to match memoized props before " +
-                      "componentDidUpdate. " +
-                      "This might either be because of a bug in React, or because " +
-                      "a component reassigns its own `this.props`. " +
-                      "Please file an issue.",
-                    getComponentNameFromFiber(finishedWork) || "instance"
-                  );
-                }
+              {
+                if (
+                  finishedWork.type === finishedWork.elementType &&
+                  !didWarnAboutReassigningProps
+                ) {
+                  if (instance.props !== finishedWork.memoizedProps) {
+                    error(
+                      "Expected %s props to match memoized props before " +
+                        "componentDidUpdate. " +
+                        "This might either be because of a bug in React, or because " +
+                        "a component reassigns its own `this.props`. " +
+                        "Please file an issue.",
+                      getComponentNameFromFiber(finishedWork) || "instance"
+                    );
+                  }
 
-                if (instance.state !== finishedWork.memoizedState) {
-                  error(
-                    "Expected %s state to match memoized state before " +
-                      "componentDidUpdate. " +
-                      "This might either be because of a bug in React, or because " +
-                      "a component reassigns its own `this.state`. " +
-                      "Please file an issue.",
-                    getComponentNameFromFiber(finishedWork) || "instance"
-                  );
+                  if (instance.state !== finishedWork.memoizedState) {
+                    error(
+                      "Expected %s state to match memoized state before " +
+                        "componentDidUpdate. " +
+                        "This might either be because of a bug in React, or because " +
+                        "a component reassigns its own `this.state`. " +
+                        "Please file an issue.",
+                      getComponentNameFromFiber(finishedWork) || "instance"
+                    );
+                  }
                 }
               }
-            }
 
-            if (finishedWork.mode & ProfileMode) {
-              try {
-                startLayoutEffectTimer();
+              if (finishedWork.mode & ProfileMode) {
+                try {
+                  startLayoutEffectTimer();
+                  instance.componentDidUpdate(
+                    prevProps,
+                    prevState,
+                    instance.__reactInternalSnapshotBeforeUpdate
+                  );
+                } finally {
+                  recordLayoutEffectDuration(finishedWork);
+                }
+              } else {
                 instance.componentDidUpdate(
                   prevProps,
                   prevState,
                   instance.__reactInternalSnapshotBeforeUpdate
                 );
-              } finally {
-                recordLayoutEffectDuration(finishedWork);
               }
-            } else {
-              instance.componentDidUpdate(
-                prevProps,
-                prevState,
-                instance.__reactInternalSnapshotBeforeUpdate
-              );
             }
           }
         } // TODO: I think this is now always non-null by the time it reaches the
@@ -17745,18 +17733,16 @@ function commitLayoutEffectOnFiber(
   }
 
   {
-    if (finishedWork.flags & Ref) {
-      commitAttachRef(finishedWork);
+    {
+      if (finishedWork.flags & Ref) {
+        commitAttachRef(finishedWork);
+      }
     }
   }
 }
 
 function hideOrUnhideAllChildren(finishedWork, isHidden) {
-  // Suspense layout effects semantics don't change for legacy roots.
-  var isModernRoot = (finishedWork.mode & ConcurrentMode) !== NoMode;
-  var current = finishedWork.alternate;
-  var wasHidden = current !== null && current.memoizedState !== null; // Only hide or unhide the top-most host nodes.
-
+  // Only hide or unhide the top-most host nodes.
   var hostSubtreeRoot = null;
 
   {
@@ -18468,7 +18454,7 @@ function commitWork(current, finishedWork) {
     }
 
     case SuspenseComponent: {
-      commitSuspenseComponent(finishedWork);
+      commitSuspenseCallback(finishedWork);
       attachSuspenseRetryListeners(finishedWork);
       return;
     }
@@ -18481,18 +18467,6 @@ function commitWork(current, finishedWork) {
     case IncompleteClassComponent: {
       return;
     }
-
-    case ScopeComponent: {
-      break;
-    }
-
-    case OffscreenComponent:
-    case LegacyHiddenComponent: {
-      var newState = finishedWork.memoizedState;
-      var isHidden = newState !== null;
-      hideOrUnhideAllChildren(finishedWork, isHidden);
-      return;
-    }
   }
 
   {
@@ -18502,26 +18476,9 @@ function commitWork(current, finishedWork) {
   }
 }
 
-function commitSuspenseComponent(finishedWork) {
+function commitSuspenseCallback(finishedWork) {
+  // TODO: Move this to passive phase
   var newState = finishedWork.memoizedState;
-
-  if (newState !== null) {
-    markCommitTimeOfFallback();
-
-    {
-      // Hide the Offscreen component that contains the primary children. TODO:
-      // Ideally, this effect would have been scheduled on the Offscreen fiber
-      // itself. That's how unhiding works: the Offscreen component schedules an
-      // effect on itself. However, in this case, the component didn't complete,
-      // so the fiber was never added to the effect list in the normal path. We
-      // could have appended it to the effect list in the Suspense component's
-      // second pass, but doing it this way is less complicated. This would be
-      // simpler if we got rid of the effect list and traversed the tree, like
-      // we're planning to do.
-      var primaryChildParent = finishedWork.child;
-      hideOrUnhideAllChildren(primaryChildParent, true);
-    }
-  }
 }
 
 function attachSuspenseRetryListeners(finishedWork) {
@@ -18633,6 +18590,10 @@ function commitMutationEffects_complete(root) {
 }
 
 function commitMutationEffectsOnFiber(finishedWork, root) {
+  // TODO: The factoring of this phase could probably be improved. Consider
+  // switching on the type of work before checking the flags. That's what
+  // we do in all the other phases. I think this one is only different
+  // because of the shared reconcilation logic below.
   var flags = finishedWork.flags;
 
   if (flags & ContentReset) {
@@ -18645,6 +18606,45 @@ function commitMutationEffectsOnFiber(finishedWork, root) {
     if (current !== null) {
       commitDetachRef(current);
     }
+  }
+
+  if (flags & Visibility) {
+    switch (finishedWork.tag) {
+      case SuspenseComponent: {
+        var newState = finishedWork.memoizedState;
+        var isHidden = newState !== null;
+
+        if (isHidden) {
+          var _current = finishedWork.alternate;
+          var wasHidden = _current !== null && _current.memoizedState !== null;
+
+          if (!wasHidden) {
+            // TODO: Move to passive phase
+            markCommitTimeOfFallback();
+          }
+        }
+
+        break;
+      }
+
+      case OffscreenComponent: {
+        var _newState = finishedWork.memoizedState;
+
+        var _isHidden = _newState !== null;
+
+        var _current2 = finishedWork.alternate;
+
+        var _wasHidden = _current2 !== null && _current2.memoizedState !== null;
+
+        var offscreenBoundary = finishedWork;
+
+        {
+          // TODO: This needs to run whenever there's an insertion or update
+          // inside a hidden Offscreen tree.
+          hideOrUnhideAllChildren(offscreenBoundary, _isHidden);
+        }
+      }
+    }
   } // The following switch statement is only concerned about placement,
   // updates, and deletions. To avoid needing to add a case for every possible
   // bitmap value, we remove the secondary effects from the effect tag and
@@ -18670,8 +18670,8 @@ function commitMutationEffectsOnFiber(finishedWork, root) {
 
       finishedWork.flags &= ~Placement; // Update
 
-      var _current = finishedWork.alternate;
-      commitWork(_current, finishedWork);
+      var _current3 = finishedWork.alternate;
+      commitWork(_current3, finishedWork);
       break;
     }
 
@@ -18683,14 +18683,14 @@ function commitMutationEffectsOnFiber(finishedWork, root) {
     case HydratingAndUpdate: {
       finishedWork.flags &= ~Hydrating; // Update
 
-      var _current2 = finishedWork.alternate;
-      commitWork(_current2, finishedWork);
+      var _current4 = finishedWork.alternate;
+      commitWork(_current4, finishedWork);
       break;
     }
 
     case Update: {
-      var _current3 = finishedWork.alternate;
-      commitWork(_current3, finishedWork);
+      var _current5 = finishedWork.alternate;
+      commitWork(_current5, finishedWork);
       break;
     }
   }
@@ -18723,9 +18723,6 @@ function commitLayoutEffects_begin(subtreeRoot, root, committedLanes) {
 }
 
 function commitLayoutMountEffects_complete(subtreeRoot, root, committedLanes) {
-  // Suspense layout effects semantics don't change for legacy roots.
-  var isModernRoot = (subtreeRoot.mode & ConcurrentMode) !== NoMode;
-
   while (nextEffect !== null) {
     var fiber = nextEffect;
 
@@ -19039,7 +19036,7 @@ function ensureCorrectReturnPointer(fiber, expectedReturnFiber) {
   // anything, by checking the warning logs for the above invariant
 
   fiber.return = expectedReturnFiber;
-}
+} // TODO: Reuse reappearLayoutEffects traversal here?
 
 function invokeLayoutEffectMountInDEV(fiber) {
   {
@@ -19176,18 +19173,15 @@ var NoContext =
 var BatchedContext =
   /*               */
   1;
-var LegacyUnbatchedContext =
-  /*       */
-  4;
 var RenderContext =
   /*                */
-  8;
+  2;
 var CommitContext =
   /*                */
-  16;
+  4;
 var RetryAfterError =
   /*       */
-  32;
+  8;
 var RootIncomplete = 0;
 var RootFatalErrored = 1;
 var RootErrored = 2;
@@ -19400,35 +19394,21 @@ function scheduleUpdateOnFiber(fiber, lane, eventTime) {
     }
   }
 
-  if (lane === SyncLane) {
-    if (
-      // Check if we're inside unbatchedUpdates
-      (executionContext & LegacyUnbatchedContext) !== NoContext && // Check if we're not already rendering
-      (executionContext & (RenderContext | CommitContext)) === NoContext
-    ) {
-      // This is a legacy edge case. The initial mount of a ReactDOM.render-ed
-      // root inside of batchedUpdates should be synchronous, but layout updates
-      // should be deferred until the end of the batch.
-      performSyncWorkOnRoot(root);
-    } else {
-      ensureRootIsScheduled(root, eventTime);
+  ensureRootIsScheduled(root, eventTime);
 
-      if (
-        executionContext === NoContext &&
-        (fiber.mode & ConcurrentMode) === NoMode
-      ) {
-        // Flush the synchronous work now, unless we're already working or inside
-        // a batch. This is intentionally inside scheduleUpdateOnFiber instead of
-        // scheduleCallbackForFiber to preserve the ability to schedule a callback
-        // without immediately flushing it. We only do this for user-initiated
-        // updates, to preserve historical behavior of legacy mode.
-        resetRenderTimer();
-        flushSyncCallbacksOnlyInLegacyMode();
-      }
-    }
-  } else {
-    // Schedule other updates after in case the callback is sync.
-    ensureRootIsScheduled(root, eventTime);
+  if (
+    lane === SyncLane &&
+    executionContext === NoContext &&
+    (fiber.mode & ConcurrentMode) === NoMode && // Treat `act` as if it's inside `batchedUpdates`, even in legacy mode.
+    !ReactCurrentActQueue.isBatchingLegacy
+  ) {
+    // Flush the synchronous work now, unless we're already working or inside
+    // a batch. This is intentionally inside scheduleUpdateOnFiber instead of
+    // scheduleCallbackForFiber to preserve the ability to schedule a callback
+    // without immediately flushing it. We only do this for user-initiated
+    // updates, to preserve historical behavior of legacy mode.
+    resetRenderTimer();
+    flushSyncCallbacksOnlyInLegacyMode();
   }
 
   return root;
@@ -19565,6 +19545,10 @@ function ensureRootIsScheduled(root, currentTime) {
     // Special case: Sync React callbacks are scheduled on a special
     // internal queue
     if (root.tag === LegacyRoot) {
+      if (ReactCurrentActQueue.isBatchingLegacy !== null) {
+        ReactCurrentActQueue.didScheduleLegacyUpdate = true;
+      }
+
       scheduleLegacySyncCallback(performSyncWorkOnRoot.bind(null, root));
     } else {
       scheduleSyncCallback(performSyncWorkOnRoot.bind(null, root));
@@ -19663,6 +19647,7 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
 
   if (exitStatus !== RootIncomplete) {
     if (exitStatus === RootErrored) {
+      var prevExecutionContext = executionContext;
       executionContext |= RetryAfterError; // If an error occurred during hydration,
       // discard server response and fall back to client side render.
 
@@ -19685,6 +19670,8 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
         lanes = errorRetryLanes;
         exitStatus = renderRootSync(root, errorRetryLanes);
       }
+
+      executionContext = prevExecutionContext;
     }
 
     if (exitStatus === RootFatalErrored) {
@@ -19863,6 +19850,7 @@ function performSyncWorkOnRoot(root) {
   var exitStatus = renderRootSync(root, lanes);
 
   if (root.tag !== LegacyRoot && exitStatus === RootErrored) {
+    var prevExecutionContext = executionContext;
     executionContext |= RetryAfterError; // If an error occurred during hydration,
     // discard server response and fall back to client side render.
 
@@ -19885,6 +19873,8 @@ function performSyncWorkOnRoot(root) {
       lanes = errorRetryLanes;
       exitStatus = renderRootSync(root, lanes);
     }
+
+    executionContext = prevExecutionContext;
   }
 
   if (exitStatus === RootFatalErrored) {
@@ -19915,13 +19905,29 @@ function batchedUpdates$1(fn, a) {
     executionContext = prevExecutionContext; // If there were legacy sync updates, flush them at the end of the outer
     // most batchedUpdates-like method.
 
-    if (executionContext === NoContext) {
+    if (
+      executionContext === NoContext && // Treat `act` as if it's inside `batchedUpdates`, even in legacy mode.
+      !ReactCurrentActQueue.isBatchingLegacy
+    ) {
       resetRenderTimer();
       flushSyncCallbacksOnlyInLegacyMode();
     }
   }
 }
-function flushSync(fn, a) {
+// Warning, this opts-out of checking the function body.
+
+// eslint-disable-next-line no-redeclare
+function flushSyncWithoutWarningIfAlreadyRendering(fn) {
+  // In legacy mode, we flush pending passive effects at the beginning of the
+  // next event, not at the end of the previous one.
+  if (
+    rootWithPendingPassiveEffects !== null &&
+    rootWithPendingPassiveEffects.tag === LegacyRoot &&
+    (executionContext & (RenderContext | CommitContext)) === NoContext
+  ) {
+    flushPassiveEffects();
+  }
+
   var prevExecutionContext = executionContext;
   executionContext |= BatchedContext;
   var prevTransition = ReactCurrentBatchConfig$2.transition;
@@ -19932,7 +19938,7 @@ function flushSync(fn, a) {
     setCurrentUpdatePriority(DiscreteEventPriority);
 
     if (fn) {
-      return fn(a);
+      return fn();
     } else {
       return undefined;
     }
@@ -19945,16 +19951,24 @@ function flushSync(fn, a) {
 
     if ((executionContext & (RenderContext | CommitContext)) === NoContext) {
       flushSyncCallbacks();
-    } else {
-      {
-        error(
-          "flushSync was called from inside a lifecycle method. React cannot " +
-            "flush when React is already rendering. Consider moving this call to " +
-            "a scheduler task or micro task."
-        );
-      }
     }
   }
+} // Overload the definition to the two valid signatures.
+// Warning, this opts-out of checking the function body.
+
+// eslint-disable-next-line no-redeclare
+function flushSync(fn) {
+  {
+    if ((executionContext & (RenderContext | CommitContext)) !== NoContext) {
+      error(
+        "flushSync was called from inside a lifecycle method. React cannot " +
+          "flush when React is already rendering. Consider moving this call to " +
+          "a scheduler task or micro task."
+      );
+    }
+  }
+
+  return flushSyncWithoutWarningIfAlreadyRendering(fn);
 }
 function pushRenderLanes(fiber, lanes) {
   push(subtreeRenderLanesCursor, subtreeRenderLanes, fiber);
@@ -20593,14 +20607,6 @@ function commitRootImpl(root, renderPriorityLevel) {
     var error$1 = firstUncaughtError;
     firstUncaughtError = null;
     throw error$1;
-  }
-
-  if ((executionContext & LegacyUnbatchedContext) !== NoContext) {
-    // a ReactDOM.render-ed root inside of batchedUpdates. The commit fired
-    // synchronously, but layout updates should be deferred until the end
-    // of the batch.
-
-    return null;
   } // If the passive effects are the result of a discrete render, flush them
   // synchronously at the end of the current task so that the result is
   // immediately observable. Otherwise, we assume that they are not
@@ -23031,65 +23037,16 @@ var emptyObject$1 = {};
   Object.freeze(emptyObject$1);
 }
 
-var getInspectorDataForViewTag;
-var getInspectorDataForViewAtPoint;
-
-{
-  var traverseOwnerTreeUp = function(hierarchy, instance) {
-    if (instance) {
-      hierarchy.unshift(instance);
-      traverseOwnerTreeUp(hierarchy, instance._debugOwner);
-    }
-  };
-
-  var getOwnerHierarchy = function(instance) {
-    var hierarchy = [];
-    traverseOwnerTreeUp(hierarchy, instance);
-    return hierarchy;
-  };
-
-  var lastNonHostInstance = function(hierarchy) {
-    for (var i = hierarchy.length - 1; i > 1; i--) {
-      var instance = hierarchy[i];
-
-      if (instance.tag !== HostComponent) {
-        return instance;
-      }
-    }
+var createHierarchy;
+var getHostNode;
+var getHostProps;
+var lastNonHostInstance;
 
-    return hierarchy[0];
-  };
-
-  var getHostProps = function(fiber) {
-    var host = findCurrentHostFiber(fiber);
-
-    if (host) {
-      return host.memoizedProps || emptyObject$1;
-    }
-
-    return emptyObject$1;
-  };
-
-  var getHostNode = function(fiber, findNodeHandle) {
-    var hostNode; // look for children first for the hostNode
-    // as composite fibers do not have a hostNode
-
-    while (fiber) {
-      if (fiber.stateNode !== null && fiber.tag === HostComponent) {
-        hostNode = findNodeHandle(fiber.stateNode);
-      }
+var getOwnerHierarchy;
+var traverseOwnerTreeUp;
 
-      if (hostNode) {
-        return hostNode;
-      }
-
-      fiber = fiber.child;
-    }
-
-    return null;
-  };
-
-  var createHierarchy = function(fiberHierarchy) {
+{
+  createHierarchy = function(fiberHierarchy) {
     return fiberHierarchy.map(function(fiber) {
       return {
         name: getComponentNameFromType(fiber.type),
@@ -23120,7 +23077,36 @@ var getInspectorDataForViewAtPoint;
     });
   };
 
-  var getInspectorDataForInstance = function(closestInstance) {
+  getHostNode = function(fiber, findNodeHandle) {
+    var hostNode; // look for children first for the hostNode
+    // as composite fibers do not have a hostNode
+
+    while (fiber) {
+      if (fiber.stateNode !== null && fiber.tag === HostComponent) {
+        hostNode = findNodeHandle(fiber.stateNode);
+      }
+
+      if (hostNode) {
+        return hostNode;
+      }
+
+      fiber = fiber.child;
+    }
+
+    return null;
+  };
+
+  getHostProps = function(fiber) {
+    var host = findCurrentHostFiber(fiber);
+
+    if (host) {
+      return host.memoizedProps || emptyObject$1;
+    }
+
+    return emptyObject$1;
+  };
+
+  exports.getInspectorDataForInstance = function(closestInstance) {
     // Handle case where user clicks outside of ReactNative
     if (!closestInstance) {
       return {
@@ -23146,6 +23132,36 @@ var getInspectorDataForViewAtPoint;
     };
   };
 
+  getOwnerHierarchy = function(instance) {
+    var hierarchy = [];
+    traverseOwnerTreeUp(hierarchy, instance);
+    return hierarchy;
+  };
+
+  lastNonHostInstance = function(hierarchy) {
+    for (var i = hierarchy.length - 1; i > 1; i--) {
+      var instance = hierarchy[i];
+
+      if (instance.tag !== HostComponent) {
+        return instance;
+      }
+    }
+
+    return hierarchy[0];
+  };
+
+  traverseOwnerTreeUp = function(hierarchy, instance) {
+    if (instance) {
+      hierarchy.unshift(instance);
+      traverseOwnerTreeUp(hierarchy, instance._debugOwner);
+    }
+  };
+}
+
+var getInspectorDataForViewTag;
+var getInspectorDataForViewAtPoint;
+
+{
   getInspectorDataForViewTag = function(viewTag) {
     var closestInstance = getInstanceFromTag(viewTag); // Handle case where user clicks outside of ReactNative
 
@@ -23201,7 +23217,7 @@ var getInspectorDataForViewAtPoint;
                     height: 0
                   }
                 },
-                getInspectorDataForInstance(closestInstance)
+                exports.getInspectorDataForInstance(closestInstance)
               )
             );
           }
@@ -23214,7 +23230,9 @@ var getInspectorDataForViewAtPoint;
           nativeFabricUIManager.measure(
             internalInstanceHandle.stateNode.node,
             function(x, y, width, height, pageX, pageY) {
-              var inspectorData = getInspectorDataForInstance(closestInstance);
+              var inspectorData = exports.getInspectorDataForInstance(
+                closestInstance
+              );
               callback(
                 Object.assign({}, inspectorData, {
                   pointerY: locationY,
@@ -23237,7 +23255,7 @@ var getInspectorDataForViewAtPoint;
         findNodeHandle(inspectedView),
         [locationX, locationY],
         function(nativeViewTag, left, top, width, height) {
-          var inspectorData = getInspectorDataForInstance(
+          var inspectorData = exports.getInspectorDataForInstance(
             getInstanceFromTag(nativeViewTag)
           );
           callback(
@@ -23389,12 +23407,12 @@ function dispatchCommand(handle, command, args) {
     return;
   }
 
-  if (handle._internalInstanceHandle) {
-    nativeFabricUIManager.dispatchCommand(
-      handle._internalInstanceHandle.stateNode.node,
-      command,
-      args
-    );
+  if (handle._internalInstanceHandle != null) {
+    var stateNode = handle._internalInstanceHandle.stateNode;
+
+    if (stateNode != null) {
+      nativeFabricUIManager.dispatchCommand(stateNode.node, command, args);
+    }
   } else {
     ReactNativePrivateInterface.UIManager.dispatchViewManagerCommand(
       handle._nativeTag,
@@ -23416,11 +23434,12 @@ function sendAccessibilityEvent(handle, eventType) {
     return;
   }
 
-  if (handle._internalInstanceHandle) {
-    nativeFabricUIManager.sendAccessibilityEvent(
-      handle._internalInstanceHandle.stateNode.node,
-      eventType
-    );
+  if (handle._internalInstanceHandle != null) {
+    var stateNode = handle._internalInstanceHandle.stateNode;
+
+    if (stateNode != null) {
+      nativeFabricUIManager.sendAccessibilityEvent(stateNode.node, eventType);
+    }
   } else {
     ReactNativePrivateInterface.legacySendAccessibilityEvent(
       handle._nativeTag,
diff --git a/Libraries/Renderer/implementations/ReactNativeRenderer-prod.fb.js b/Libraries/Renderer/implementations/ReactNativeRenderer-prod.fb.js
index 69fa5b0e054f11..43eb09ea3ed134 100644
--- a/Libraries/Renderer/implementations/ReactNativeRenderer-prod.fb.js
+++ b/Libraries/Renderer/implementations/ReactNativeRenderer-prod.fb.js
@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<bea4ed702f3d50248708067249bc66f2>>
+ * @generated SignedSource<<d971e35e5aff7b80bf3e25f90ae4defb>>
  */
 
 "use strict";
@@ -930,7 +930,7 @@ eventPluginOrder = Array.prototype.slice.call([
   "ReactNativeBridgeEventPlugin"
 ]);
 recomputePluginOrdering();
-var injectedNamesToPlugins$jscomp$inline_219 = {
+var injectedNamesToPlugins$jscomp$inline_224 = {
     ResponderEventPlugin: ResponderEventPlugin,
     ReactNativeBridgeEventPlugin: {
       eventTypes: {},
@@ -965,34 +965,34 @@ var injectedNamesToPlugins$jscomp$inline_219 = {
       }
     }
   },
-  isOrderingDirty$jscomp$inline_220 = !1,
-  pluginName$jscomp$inline_221;
-for (pluginName$jscomp$inline_221 in injectedNamesToPlugins$jscomp$inline_219)
+  isOrderingDirty$jscomp$inline_225 = !1,
+  pluginName$jscomp$inline_226;
+for (pluginName$jscomp$inline_226 in injectedNamesToPlugins$jscomp$inline_224)
   if (
-    injectedNamesToPlugins$jscomp$inline_219.hasOwnProperty(
-      pluginName$jscomp$inline_221
+    injectedNamesToPlugins$jscomp$inline_224.hasOwnProperty(
+      pluginName$jscomp$inline_226
     )
   ) {
-    var pluginModule$jscomp$inline_222 =
-      injectedNamesToPlugins$jscomp$inline_219[pluginName$jscomp$inline_221];
+    var pluginModule$jscomp$inline_227 =
+      injectedNamesToPlugins$jscomp$inline_224[pluginName$jscomp$inline_226];
     if (
-      !namesToPlugins.hasOwnProperty(pluginName$jscomp$inline_221) ||
-      namesToPlugins[pluginName$jscomp$inline_221] !==
-        pluginModule$jscomp$inline_222
+      !namesToPlugins.hasOwnProperty(pluginName$jscomp$inline_226) ||
+      namesToPlugins[pluginName$jscomp$inline_226] !==
+        pluginModule$jscomp$inline_227
     ) {
-      if (namesToPlugins[pluginName$jscomp$inline_221])
+      if (namesToPlugins[pluginName$jscomp$inline_226])
         throw Error(
           "EventPluginRegistry: Cannot inject two different event plugins using the same name, `" +
-            pluginName$jscomp$inline_221 +
+            pluginName$jscomp$inline_226 +
             "`."
         );
       namesToPlugins[
-        pluginName$jscomp$inline_221
-      ] = pluginModule$jscomp$inline_222;
-      isOrderingDirty$jscomp$inline_220 = !0;
+        pluginName$jscomp$inline_226
+      ] = pluginModule$jscomp$inline_227;
+      isOrderingDirty$jscomp$inline_225 = !0;
     }
   }
-isOrderingDirty$jscomp$inline_220 && recomputePluginOrdering();
+isOrderingDirty$jscomp$inline_225 && recomputePluginOrdering();
 var instanceCache = new Map(),
   instanceProps = new Map();
 function getInstanceFromTag(tag) {
@@ -2236,7 +2236,7 @@ function enqueueUpdate(fiber, update) {
     ((updateQueue = updateQueue.shared),
     null !== workInProgressRoot &&
     0 !== (fiber.mode & 1) &&
-    0 === (executionContext & 8)
+    0 === (executionContext & 2)
       ? ((fiber = updateQueue.interleaved),
         null === fiber
           ? ((update.next = update),
@@ -3073,60 +3073,49 @@ function ChildReconciler(shouldTrackSideEffects) {
     return iteratorFn;
   }
   return function(returnFiber, currentFirstChild, newChild, lanes) {
-    var isUnkeyedTopLevelFragment =
-      "object" === typeof newChild &&
+    "object" === typeof newChild &&
       null !== newChild &&
       newChild.type === REACT_FRAGMENT_TYPE &&
-      null === newChild.key;
-    isUnkeyedTopLevelFragment && (newChild = newChild.props.children);
+      null === newChild.key &&
+      (newChild = newChild.props.children);
     if ("object" === typeof newChild && null !== newChild) {
       switch (newChild.$$typeof) {
         case REACT_ELEMENT_TYPE:
           a: {
-            var key = newChild.key;
             for (
-              isUnkeyedTopLevelFragment = currentFirstChild;
-              null !== isUnkeyedTopLevelFragment;
+              var key = newChild.key, child = currentFirstChild;
+              null !== child;
 
             ) {
-              if (isUnkeyedTopLevelFragment.key === key) {
+              if (child.key === key) {
                 key = newChild.type;
                 if (key === REACT_FRAGMENT_TYPE) {
-                  if (7 === isUnkeyedTopLevelFragment.tag) {
-                    deleteRemainingChildren(
-                      returnFiber,
-                      isUnkeyedTopLevelFragment.sibling
-                    );
+                  if (7 === child.tag) {
+                    deleteRemainingChildren(returnFiber, child.sibling);
                     currentFirstChild = useFiber(
-                      isUnkeyedTopLevelFragment,
+                      child,
                       newChild.props.children
                     );
                     currentFirstChild.return = returnFiber;
                     returnFiber = currentFirstChild;
                     break a;
                   }
-                } else if (isUnkeyedTopLevelFragment.elementType === key) {
-                  deleteRemainingChildren(
-                    returnFiber,
-                    isUnkeyedTopLevelFragment.sibling
-                  );
-                  currentFirstChild = useFiber(
-                    isUnkeyedTopLevelFragment,
-                    newChild.props
-                  );
+                } else if (child.elementType === key) {
+                  deleteRemainingChildren(returnFiber, child.sibling);
+                  currentFirstChild = useFiber(child, newChild.props);
                   currentFirstChild.ref = coerceRef(
                     returnFiber,
-                    isUnkeyedTopLevelFragment,
+                    child,
                     newChild
                   );
                   currentFirstChild.return = returnFiber;
                   returnFiber = currentFirstChild;
                   break a;
                 }
-                deleteRemainingChildren(returnFiber, isUnkeyedTopLevelFragment);
+                deleteRemainingChildren(returnFiber, child);
                 break;
-              } else deleteChild(returnFiber, isUnkeyedTopLevelFragment);
-              isUnkeyedTopLevelFragment = isUnkeyedTopLevelFragment.sibling;
+              } else deleteChild(returnFiber, child);
+              child = child.sibling;
             }
             newChild.type === REACT_FRAGMENT_TYPE
               ? ((currentFirstChild = createFiberFromFragment(
@@ -3156,12 +3145,8 @@ function ChildReconciler(shouldTrackSideEffects) {
           return placeSingleChild(returnFiber);
         case REACT_PORTAL_TYPE:
           a: {
-            for (
-              isUnkeyedTopLevelFragment = newChild.key;
-              null !== currentFirstChild;
-
-            ) {
-              if (currentFirstChild.key === isUnkeyedTopLevelFragment)
+            for (child = newChild.key; null !== currentFirstChild; ) {
+              if (currentFirstChild.key === child)
                 if (
                   4 === currentFirstChild.tag &&
                   currentFirstChild.stateNode.containerInfo ===
@@ -3213,9 +3198,8 @@ function ChildReconciler(shouldTrackSideEffects) {
         );
       throwOnInvalidObjectType(returnFiber, newChild);
     }
-    if ("string" === typeof newChild || "number" === typeof newChild)
-      return (
-        (newChild = "" + newChild),
+    return "string" === typeof newChild || "number" === typeof newChild
+      ? ((newChild = "" + newChild),
         null !== currentFirstChild && 6 === currentFirstChild.tag
           ? (deleteRemainingChildren(returnFiber, currentFirstChild.sibling),
             (currentFirstChild = useFiber(currentFirstChild, newChild)),
@@ -3229,20 +3213,8 @@ function ChildReconciler(shouldTrackSideEffects) {
             )),
             (currentFirstChild.return = returnFiber),
             (returnFiber = currentFirstChild)),
-        placeSingleChild(returnFiber)
-      );
-    if ("undefined" === typeof newChild && !isUnkeyedTopLevelFragment)
-      switch (returnFiber.tag) {
-        case 1:
-        case 0:
-        case 11:
-        case 15:
-          throw Error(
-            (getComponentNameFromFiber(returnFiber) || "Component") +
-              "(...): Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null."
-          );
-      }
-    return deleteRemainingChildren(returnFiber, currentFirstChild);
+        placeSingleChild(returnFiber))
+      : deleteRemainingChildren(returnFiber, currentFirstChild);
   };
 }
 var reconcileChildFibers = ChildReconciler(!0),
@@ -3797,7 +3769,7 @@ function dispatchAction(fiber, queue, action) {
     if (
       null !== workInProgressRoot &&
       0 !== (fiber.mode & 1) &&
-      0 === (executionContext & 8)
+      0 === (executionContext & 2)
     ) {
       var interleaved = queue.interleaved;
       null === interleaved
@@ -4587,7 +4559,6 @@ function updateSuspenseComponent(current, workInProgress, renderLanes) {
   JSCompiler_temp
     ? ((showFallback = !0), (workInProgress.flags &= -129))
     : (null !== current && null === current.memoizedState) ||
-      void 0 === nextProps.fallback ||
       !0 === nextProps.unstable_avoidThisFallback ||
       (suspenseContext |= 1);
   push(suspenseStackCursor, suspenseContext & 1);
@@ -5122,10 +5093,13 @@ function completeWork(current, workInProgress, renderLanes) {
       newProps = workInProgress.memoizedState;
       if (0 !== (workInProgress.flags & 128))
         return (workInProgress.lanes = renderLanes), workInProgress;
-      newProps = null !== newProps;
       renderLanes = !1;
       null !== current && (renderLanes = null !== current.memoizedState);
-      if (newProps && !renderLanes && 0 !== (workInProgress.mode & 1))
+      if (
+        null !== newProps &&
+        !renderLanes &&
+        ((workInProgress.child.flags |= 4096), 0 !== (workInProgress.mode & 1))
+      )
         if (
           (null === current &&
             !0 !== workInProgress.memoizedProps.unstable_avoidThisFallback) ||
@@ -5147,7 +5121,7 @@ function completeWork(current, workInProgress, renderLanes) {
               workInProgressRootRenderLanes
             );
         }
-      if (newProps || renderLanes) workInProgress.flags |= 4;
+      null !== workInProgress.updateQueue && (workInProgress.flags |= 4);
       bubbleProperties(workInProgress);
       return null;
     case 4:
@@ -5299,11 +5273,16 @@ function completeWork(current, workInProgress, renderLanes) {
         null !== current &&
           (null !== current.memoizedState) !== renderLanes &&
           "unstable-defer-without-hiding" !== newProps.mode &&
-          (workInProgress.flags |= 4),
-        (renderLanes &&
-          0 === (subtreeRenderLanes & 1073741824) &&
-          0 !== (workInProgress.mode & 1)) ||
-          bubbleProperties(workInProgress),
+          23 !== workInProgress.tag &&
+          (workInProgress.flags |= 4096),
+        renderLanes && 0 !== (workInProgress.mode & 1)
+          ? 0 !== (subtreeRenderLanes & 1073741824) &&
+            (bubbleProperties(workInProgress),
+            23 !== workInProgress.tag &&
+              workInProgress.subtreeFlags & 6 &&
+              "unstable-defer-without-hiding" !== newProps.mode &&
+              (workInProgress.flags |= 4096))
+          : bubbleProperties(workInProgress),
         null
       );
   }
@@ -5473,68 +5452,6 @@ function commitHookEffectListMount(tag, finishedWork) {
     } while (effect !== finishedWork);
   }
 }
-function hideOrUnhideAllChildren(finishedWork, isHidden) {
-  for (var hostSubtreeRoot = null, node = finishedWork; ; ) {
-    if (5 === node.tag) {
-      if (null === hostSubtreeRoot) {
-        hostSubtreeRoot = node;
-        var instance = node.stateNode;
-        if (isHidden) {
-          var viewConfig = instance.viewConfig;
-          var updatePayload = diffProperties(
-            null,
-            emptyObject,
-            { style: { display: "none" } },
-            viewConfig.validAttributes
-          );
-          ReactNativePrivateInterface.UIManager.updateView(
-            instance._nativeTag,
-            viewConfig.uiViewClassName,
-            updatePayload
-          );
-        } else {
-          instance = node.stateNode;
-          updatePayload = node.memoizedProps;
-          viewConfig = instance.viewConfig;
-          var prevProps = Object.assign({}, updatePayload, {
-            style: [updatePayload.style, { display: "none" }]
-          });
-          updatePayload = diffProperties(
-            null,
-            prevProps,
-            updatePayload,
-            viewConfig.validAttributes
-          );
-          ReactNativePrivateInterface.UIManager.updateView(
-            instance._nativeTag,
-            viewConfig.uiViewClassName,
-            updatePayload
-          );
-        }
-      }
-    } else if (6 === node.tag) {
-      if (null === hostSubtreeRoot) throw Error("Not yet implemented.");
-    } else if (
-      ((22 !== node.tag && 23 !== node.tag) ||
-        null === node.memoizedState ||
-        node === finishedWork) &&
-      null !== node.child
-    ) {
-      node.child.return = node;
-      node = node.child;
-      continue;
-    }
-    if (node === finishedWork) break;
-    for (; null === node.sibling; ) {
-      if (null === node.return || node.return === finishedWork) return;
-      hostSubtreeRoot === node && (hostSubtreeRoot = null);
-      node = node.return;
-    }
-    hostSubtreeRoot === node && (hostSubtreeRoot = null);
-    node.sibling.return = node.return;
-    node = node.sibling;
-  }
-}
 function commitUnmount(finishedRoot, current, nearestMountedAncestor$jscomp$0) {
   if (injectedHook && "function" === typeof injectedHook.onCommitFiberUnmount)
     try {
@@ -5925,9 +5842,6 @@ function commitWork(current, finishedWork) {
     case 12:
       return;
     case 13:
-      null !== finishedWork.memoizedState &&
-        ((globalMostRecentFallbackTime = now()),
-        hideOrUnhideAllChildren(finishedWork.child, !0));
       attachSuspenseRetryListeners(finishedWork);
       return;
     case 19:
@@ -5935,13 +5849,6 @@ function commitWork(current, finishedWork) {
       return;
     case 17:
       return;
-    case 22:
-    case 23:
-      hideOrUnhideAllChildren(
-        finishedWork,
-        null !== finishedWork.memoizedState
-      );
-      return;
   }
   throw Error(
     "This unit of work tag should not have side-effects. This error is likely caused by a bug in React. Please file an issue."
@@ -5995,6 +5902,87 @@ function commitMutationEffects(root, firstChild) {
                   : (currentRef.current = null));
             }
           }
+          if (flags & 4096)
+            switch (firstChild.tag) {
+              case 13:
+                if (null !== firstChild.memoizedState) {
+                  var current$87 = firstChild.alternate;
+                  if (null === current$87 || null === current$87.memoizedState)
+                    globalMostRecentFallbackTime = now();
+                }
+                break;
+              case 22:
+                a: {
+                  deletions = firstChild;
+                  var isHidden = null !== firstChild.memoizedState;
+                  i = null;
+                  for (childToDelete = deletions; ; ) {
+                    if (5 === childToDelete.tag) {
+                      if (null === i) {
+                        i = childToDelete;
+                        var instance = childToDelete.stateNode;
+                        if (isHidden) {
+                          var instance$jscomp$0 = instance,
+                            viewConfig = instance$jscomp$0.viewConfig;
+                          var updatePayload = diffProperties(
+                            null,
+                            emptyObject,
+                            { style: { display: "none" } },
+                            viewConfig.validAttributes
+                          );
+                          ReactNativePrivateInterface.UIManager.updateView(
+                            instance$jscomp$0._nativeTag,
+                            viewConfig.uiViewClassName,
+                            updatePayload
+                          );
+                        } else {
+                          var instance$jscomp$1 = childToDelete.stateNode,
+                            props = childToDelete.memoizedProps,
+                            viewConfig$jscomp$0 = instance$jscomp$1.viewConfig,
+                            prevProps = Object.assign({}, props, {
+                              style: [props.style, { display: "none" }]
+                            });
+                          var updatePayload$jscomp$0 = diffProperties(
+                            null,
+                            prevProps,
+                            props,
+                            viewConfig$jscomp$0.validAttributes
+                          );
+                          ReactNativePrivateInterface.UIManager.updateView(
+                            instance$jscomp$1._nativeTag,
+                            viewConfig$jscomp$0.uiViewClassName,
+                            updatePayload$jscomp$0
+                          );
+                        }
+                      }
+                    } else if (6 === childToDelete.tag) {
+                      if (null === i) throw Error("Not yet implemented.");
+                    } else if (
+                      ((22 !== childToDelete.tag && 23 !== childToDelete.tag) ||
+                        null === childToDelete.memoizedState ||
+                        childToDelete === deletions) &&
+                      null !== childToDelete.child
+                    ) {
+                      childToDelete.child.return = childToDelete;
+                      childToDelete = childToDelete.child;
+                      continue;
+                    }
+                    if (childToDelete === deletions) break;
+                    for (; null === childToDelete.sibling; ) {
+                      if (
+                        null === childToDelete.return ||
+                        childToDelete.return === deletions
+                      )
+                        break a;
+                      i === childToDelete && (i = null);
+                      childToDelete = childToDelete.return;
+                    }
+                    i === childToDelete && (i = null);
+                    childToDelete.sibling.return = childToDelete.return;
+                    childToDelete = childToDelete.sibling;
+                  }
+                }
+            }
           switch (flags & 2054) {
             case 2:
               commitPlacement(firstChild);
@@ -6032,15 +6020,15 @@ function commitLayoutEffects(finishedWork) {
   for (nextEffect = finishedWork; null !== nextEffect; ) {
     var fiber = nextEffect,
       firstChild = fiber.child;
-    if (0 !== (fiber.subtreeFlags & 324) && null !== firstChild)
+    if (0 !== (fiber.subtreeFlags & 4420) && null !== firstChild)
       (firstChild.return = fiber), (nextEffect = firstChild);
     else
       for (fiber = finishedWork; null !== nextEffect; ) {
         firstChild = nextEffect;
-        if (0 !== (firstChild.flags & 324)) {
+        if (0 !== (firstChild.flags & 4420)) {
           var current = firstChild.alternate;
           try {
-            if (0 !== (firstChild.flags & 68))
+            if (0 !== (firstChild.flags & 4420))
               switch (firstChild.tag) {
                 case 0:
                 case 11:
@@ -6168,7 +6156,7 @@ var ceil = Math.ceil,
   currentEventTime = -1,
   currentEventTransitionLane = 0;
 function requestEventTime() {
-  return 0 !== (executionContext & 24)
+  return 0 !== (executionContext & 6)
     ? now()
     : -1 !== currentEventTime
     ? currentEventTime
@@ -6176,7 +6164,7 @@ function requestEventTime() {
 }
 function requestUpdateLane(fiber) {
   if (0 === (fiber.mode & 1)) return 1;
-  if (0 !== (executionContext & 8) && 0 !== workInProgressRootRenderLanes)
+  if (0 !== (executionContext & 2) && 0 !== workInProgressRootRenderLanes)
     return workInProgressRootRenderLanes & -workInProgressRootRenderLanes;
   if (0 !== ReactCurrentBatchConfig.transition)
     return (
@@ -6201,18 +6189,15 @@ function scheduleUpdateOnFiber(fiber, lane, eventTime) {
   if (null === root) return null;
   markRootUpdated(root, lane, eventTime);
   root === workInProgressRoot &&
-    (0 === (executionContext & 8) && (workInProgressRootUpdatedLanes |= lane),
+    (0 === (executionContext & 2) && (workInProgressRootUpdatedLanes |= lane),
     4 === workInProgressRootExitStatus &&
       markRootSuspended$1(root, workInProgressRootRenderLanes));
-  1 === lane
-    ? 0 !== (executionContext & 4) && 0 === (executionContext & 24)
-      ? performSyncWorkOnRoot(root)
-      : (ensureRootIsScheduled(root, eventTime),
-        0 === executionContext &&
-          0 === (fiber.mode & 1) &&
-          ((workInProgressRootRenderTargetTime = now() + 500),
-          includesLegacySyncCallbacks && flushSyncCallbacks()))
-    : ensureRootIsScheduled(root, eventTime);
+  ensureRootIsScheduled(root, eventTime);
+  1 === lane &&
+    0 === executionContext &&
+    0 === (fiber.mode & 1) &&
+    ((workInProgressRootRenderTargetTime = now() + 500),
+    includesLegacySyncCallbacks && flushSyncCallbacks());
   return root;
 }
 function markUpdateLaneFromFiberToRoot(sourceFiber, lane) {
@@ -6302,7 +6287,7 @@ function ensureRootIsScheduled(root, currentTime) {
 function performConcurrentWorkOnRoot(root, didTimeout) {
   currentEventTime = -1;
   currentEventTransitionLane = 0;
-  if (0 !== (executionContext & 24))
+  if (0 !== (executionContext & 6))
     throw Error("Should not already be working.");
   var originalCallbackNode = root.callbackNode;
   if (flushPassiveEffects() && root.callbackNode !== originalCallbackNode)
@@ -6321,7 +6306,7 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
   if (JSCompiler_inline_result && !didTimeout) {
     didTimeout = lanes;
     JSCompiler_inline_result = executionContext;
-    executionContext |= 8;
+    executionContext |= 2;
     var prevDispatcher = pushDispatcher();
     if (
       workInProgressRoot !== root ||
@@ -6348,12 +6333,14 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
   } else didTimeout = renderRootSync(root, lanes);
   if (0 !== didTimeout) {
     2 === didTimeout &&
-      ((executionContext |= 32),
+      ((JSCompiler_inline_result = executionContext),
+      (executionContext |= 8),
       root.hydrate && (root.hydrate = !1),
-      (JSCompiler_inline_result = getLanesToRetrySynchronouslyOnError(root)),
-      0 !== JSCompiler_inline_result &&
-        ((lanes = JSCompiler_inline_result),
-        (didTimeout = renderRootSync(root, JSCompiler_inline_result))));
+      (prevDispatcher = getLanesToRetrySynchronouslyOnError(root)),
+      0 !== prevDispatcher &&
+        ((lanes = prevDispatcher),
+        (didTimeout = renderRootSync(root, prevDispatcher))),
+      (executionContext = JSCompiler_inline_result));
     if (1 === didTimeout)
       throw ((originalCallbackNode = workInProgressRootFatalError),
       prepareFreshStack(root, 0),
@@ -6453,18 +6440,20 @@ function markRootSuspended$1(root, suspendedLanes) {
   }
 }
 function performSyncWorkOnRoot(root) {
-  if (0 !== (executionContext & 24))
+  if (0 !== (executionContext & 6))
     throw Error("Should not already be working.");
   flushPassiveEffects();
   var lanes = getNextLanes(root, 0);
   if (0 === (lanes & 1)) return ensureRootIsScheduled(root, now()), null;
   var exitStatus = renderRootSync(root, lanes);
   if (0 !== root.tag && 2 === exitStatus) {
-    executionContext |= 32;
+    var prevExecutionContext = executionContext;
+    executionContext |= 8;
     root.hydrate && (root.hydrate = !1);
     var errorRetryLanes = getLanesToRetrySynchronouslyOnError(root);
     0 !== errorRetryLanes &&
       ((lanes = errorRetryLanes), (exitStatus = renderRootSync(root, lanes)));
+    executionContext = prevExecutionContext;
   }
   if (1 === exitStatus)
     throw ((exitStatus = workInProgressRootFatalError),
@@ -6612,19 +6601,17 @@ function handleError(root$jscomp$0, thrownValue) {
             var JSCompiler_temp;
             if ((JSCompiler_temp = 13 === workInProgress$32.tag)) {
               var nextState = workInProgress$32.memoizedState;
-              if (null !== nextState)
-                JSCompiler_temp = null !== nextState.dehydrated ? !0 : !1;
-              else {
-                var props = workInProgress$32.memoizedProps;
-                JSCompiler_temp =
-                  void 0 === props.fallback
-                    ? !1
-                    : !0 !== props.unstable_avoidThisFallback
+              JSCompiler_temp =
+                null !== nextState
+                  ? null !== nextState.dehydrated
                     ? !0
-                    : hasInvisibleParentBoundary
-                    ? !1
-                    : !0;
-              }
+                    : !1
+                  : !0 !==
+                    workInProgress$32.memoizedProps.unstable_avoidThisFallback
+                  ? !0
+                  : hasInvisibleParentBoundary
+                  ? !1
+                  : !0;
             }
             if (JSCompiler_temp) {
               var wakeables = workInProgress$32.updateQueue;
@@ -6744,7 +6731,7 @@ function pushDispatcher() {
 }
 function renderRootSync(root, lanes) {
   var prevExecutionContext = executionContext;
-  executionContext |= 8;
+  executionContext |= 2;
   var prevDispatcher = pushDispatcher();
   (workInProgressRoot === root && workInProgressRootRenderLanes === lanes) ||
     prepareFreshStack(root, lanes);
@@ -6830,7 +6817,7 @@ function commitRoot(root) {
 function commitRootImpl(root, renderPriorityLevel) {
   do flushPassiveEffects();
   while (null !== rootWithPendingPassiveEffects);
-  if (0 !== (executionContext & 24))
+  if (0 !== (executionContext & 6))
     throw Error("Should not already be working.");
   var finishedWork = root.finishedWork,
     lanes = root.finishedLanes;
@@ -6863,7 +6850,7 @@ function commitRootImpl(root, renderPriorityLevel) {
     var previousPriority = currentUpdatePriority;
     currentUpdatePriority = 1;
     var prevExecutionContext = executionContext;
-    executionContext |= 16;
+    executionContext |= 4;
     ReactCurrentOwner$2.current = null;
     commitBeforeMutationEffects(root, finishedWork);
     commitMutationEffects(root, finishedWork);
@@ -6892,7 +6879,6 @@ function commitRootImpl(root, renderPriorityLevel) {
     (root = firstUncaughtError),
     (firstUncaughtError = null),
     root);
-  if (0 !== (executionContext & 4)) return null;
   0 !== (pendingPassiveEffectsLanes & 1) &&
     0 !== root.tag &&
     flushPassiveEffects();
@@ -6913,10 +6899,10 @@ function flushPassiveEffects() {
         renderPriority = rootWithPendingPassiveEffects;
         rootWithPendingPassiveEffects = null;
         pendingPassiveEffectsLanes = 0;
-        if (0 !== (executionContext & 24))
+        if (0 !== (executionContext & 6))
           throw Error("Cannot flush passive effects while already rendering.");
         var prevExecutionContext = executionContext;
-        executionContext |= 16;
+        executionContext |= 4;
         for (nextEffect = renderPriority.current; null !== nextEffect; ) {
           var fiber = nextEffect,
             child = fiber.child;
@@ -7926,6 +7912,95 @@ function updateContainer(element, container, parentComponent, callback) {
 function emptyFindFiberByHostInstance() {
   return null;
 }
+var emptyObject$1 = {},
+  createHierarchy,
+  getHostNode,
+  getHostProps,
+  lastNonHostInstance,
+  getOwnerHierarchy,
+  traverseOwnerTreeUp;
+createHierarchy = function(fiberHierarchy) {
+  return fiberHierarchy.map(function(fiber) {
+    return {
+      name: getComponentNameFromType(fiber.type),
+      getInspectorData: function(findNodeHandle) {
+        return {
+          props: getHostProps(fiber),
+          source: fiber._debugSource,
+          measure: function(callback) {
+            var hostFiber = findCurrentHostFiber(fiber);
+            if (
+              (hostFiber =
+                null != hostFiber &&
+                null !== hostFiber.stateNode &&
+                hostFiber.stateNode.node)
+            )
+              nativeFabricUIManager.measure(hostFiber, callback);
+            else
+              return ReactNativePrivateInterface.UIManager.measure(
+                getHostNode(fiber, findNodeHandle),
+                callback
+              );
+          }
+        };
+      }
+    };
+  });
+};
+getHostNode = function(fiber, findNodeHandle) {
+  for (var hostNode; fiber; ) {
+    null !== fiber.stateNode &&
+      5 === fiber.tag &&
+      (hostNode = findNodeHandle(fiber.stateNode));
+    if (hostNode) return hostNode;
+    fiber = fiber.child;
+  }
+  return null;
+};
+getHostProps = function(fiber) {
+  return (fiber = findCurrentHostFiber(fiber))
+    ? fiber.memoizedProps || emptyObject$1
+    : emptyObject$1;
+};
+exports.getInspectorDataForInstance = function(closestInstance) {
+  if (!closestInstance)
+    return {
+      hierarchy: [],
+      props: emptyObject$1,
+      selectedIndex: null,
+      source: null
+    };
+  closestInstance = findCurrentFiberUsingSlowPath(closestInstance);
+  var fiberHierarchy = getOwnerHierarchy(closestInstance),
+    instance = lastNonHostInstance(fiberHierarchy);
+  closestInstance = createHierarchy(fiberHierarchy);
+  var props = getHostProps(instance),
+    source = instance._debugSource;
+  fiberHierarchy = fiberHierarchy.indexOf(instance);
+  return {
+    hierarchy: closestInstance,
+    props: props,
+    selectedIndex: fiberHierarchy,
+    source: source
+  };
+};
+getOwnerHierarchy = function(instance) {
+  var hierarchy = [];
+  traverseOwnerTreeUp(hierarchy, instance);
+  return hierarchy;
+};
+lastNonHostInstance = function(hierarchy) {
+  for (var i = hierarchy.length - 1; 1 < i; i--) {
+    var instance = hierarchy[i];
+    if (5 !== instance.tag) return instance;
+  }
+  return hierarchy[0];
+};
+traverseOwnerTreeUp = function(hierarchy, instance) {
+  instance &&
+    (hierarchy.unshift(instance),
+    traverseOwnerTreeUp(hierarchy, instance._debugOwner));
+};
 function findNodeHandle(componentOrHandle) {
   if (null == componentOrHandle) return null;
   if ("number" === typeof componentOrHandle) return componentOrHandle;
@@ -7959,10 +8034,10 @@ batchedUpdatesImpl = function(fn, a) {
   }
 };
 var roots = new Map(),
-  devToolsConfig$jscomp$inline_983 = {
+  devToolsConfig$jscomp$inline_981 = {
     findFiberByHostInstance: getInstanceFromTag,
     bundleType: 0,
-    version: "18.0.0-cae635054-20210626",
+    version: "18.0.0-419cc9c37-20210726",
     rendererPackageName: "react-native-renderer",
     rendererConfig: {
       getInspectorDataForViewTag: function() {
@@ -7977,11 +8052,11 @@ var roots = new Map(),
       }.bind(null, findNodeHandle)
     }
   };
-var internals$jscomp$inline_1237 = {
-  bundleType: devToolsConfig$jscomp$inline_983.bundleType,
-  version: devToolsConfig$jscomp$inline_983.version,
-  rendererPackageName: devToolsConfig$jscomp$inline_983.rendererPackageName,
-  rendererConfig: devToolsConfig$jscomp$inline_983.rendererConfig,
+var internals$jscomp$inline_1228 = {
+  bundleType: devToolsConfig$jscomp$inline_981.bundleType,
+  version: devToolsConfig$jscomp$inline_981.version,
+  rendererPackageName: devToolsConfig$jscomp$inline_981.rendererPackageName,
+  rendererConfig: devToolsConfig$jscomp$inline_981.rendererConfig,
   overrideHookState: null,
   overrideHookStateDeletePath: null,
   overrideHookStateRenamePath: null,
@@ -7997,26 +8072,26 @@ var internals$jscomp$inline_1237 = {
     return null === fiber ? null : fiber.stateNode;
   },
   findFiberByHostInstance:
-    devToolsConfig$jscomp$inline_983.findFiberByHostInstance ||
+    devToolsConfig$jscomp$inline_981.findFiberByHostInstance ||
     emptyFindFiberByHostInstance,
   findHostInstancesForRefresh: null,
   scheduleRefresh: null,
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "18.0.0-cae635054-20210626"
+  reconcilerVersion: "18.0.0-419cc9c37-20210726"
 };
 if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
-  var hook$jscomp$inline_1238 = __REACT_DEVTOOLS_GLOBAL_HOOK__;
+  var hook$jscomp$inline_1229 = __REACT_DEVTOOLS_GLOBAL_HOOK__;
   if (
-    !hook$jscomp$inline_1238.isDisabled &&
-    hook$jscomp$inline_1238.supportsFiber
+    !hook$jscomp$inline_1229.isDisabled &&
+    hook$jscomp$inline_1229.supportsFiber
   )
     try {
-      (rendererID = hook$jscomp$inline_1238.inject(
-        internals$jscomp$inline_1237
+      (rendererID = hook$jscomp$inline_1229.inject(
+        internals$jscomp$inline_1228
       )),
-        (injectedHook = hook$jscomp$inline_1238);
+        (injectedHook = hook$jscomp$inline_1229);
     } catch (err) {}
 }
 exports.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED = {
@@ -8036,12 +8111,10 @@ exports.createPortal = function(children, containerTag) {
 };
 exports.dispatchCommand = function(handle, command, args) {
   null != handle._nativeTag &&
-    (handle._internalInstanceHandle
-      ? nativeFabricUIManager.dispatchCommand(
-          handle._internalInstanceHandle.stateNode.node,
-          command,
-          args
-        )
+    (null != handle._internalInstanceHandle
+      ? ((handle = handle._internalInstanceHandle.stateNode),
+        null != handle &&
+          nativeFabricUIManager.dispatchCommand(handle.node, command, args))
       : ReactNativePrivateInterface.UIManager.dispatchViewManagerCommand(
           handle._nativeTag,
           command,
@@ -8086,11 +8159,10 @@ exports.render = function(element, containerTag, callback) {
 };
 exports.sendAccessibilityEvent = function(handle, eventType) {
   null != handle._nativeTag &&
-    (handle._internalInstanceHandle
-      ? nativeFabricUIManager.sendAccessibilityEvent(
-          handle._internalInstanceHandle.stateNode.node,
-          eventType
-        )
+    (null != handle._internalInstanceHandle
+      ? ((handle = handle._internalInstanceHandle.stateNode),
+        null != handle &&
+          nativeFabricUIManager.sendAccessibilityEvent(handle.node, eventType))
       : ReactNativePrivateInterface.legacySendAccessibilityEvent(
           handle._nativeTag,
           eventType
diff --git a/Libraries/Renderer/implementations/ReactNativeRenderer-profiling.fb.js b/Libraries/Renderer/implementations/ReactNativeRenderer-profiling.fb.js
index 69d8e1ccc04d44..2c8a86864cfa14 100644
--- a/Libraries/Renderer/implementations/ReactNativeRenderer-profiling.fb.js
+++ b/Libraries/Renderer/implementations/ReactNativeRenderer-profiling.fb.js
@@ -7,7 +7,7 @@
  * @noflow
  * @nolint
  * @preventMunge
- * @generated SignedSource<<77d835ca6cf96fe4731cd307ffa7cac7>>
+ * @generated SignedSource<<a2b99a70156d078c66a62b67533599ad>>
  */
 
 "use strict";
@@ -930,7 +930,7 @@ eventPluginOrder = Array.prototype.slice.call([
   "ReactNativeBridgeEventPlugin"
 ]);
 recomputePluginOrdering();
-var injectedNamesToPlugins$jscomp$inline_227 = {
+var injectedNamesToPlugins$jscomp$inline_232 = {
     ResponderEventPlugin: ResponderEventPlugin,
     ReactNativeBridgeEventPlugin: {
       eventTypes: {},
@@ -965,34 +965,34 @@ var injectedNamesToPlugins$jscomp$inline_227 = {
       }
     }
   },
-  isOrderingDirty$jscomp$inline_228 = !1,
-  pluginName$jscomp$inline_229;
-for (pluginName$jscomp$inline_229 in injectedNamesToPlugins$jscomp$inline_227)
+  isOrderingDirty$jscomp$inline_233 = !1,
+  pluginName$jscomp$inline_234;
+for (pluginName$jscomp$inline_234 in injectedNamesToPlugins$jscomp$inline_232)
   if (
-    injectedNamesToPlugins$jscomp$inline_227.hasOwnProperty(
-      pluginName$jscomp$inline_229
+    injectedNamesToPlugins$jscomp$inline_232.hasOwnProperty(
+      pluginName$jscomp$inline_234
     )
   ) {
-    var pluginModule$jscomp$inline_230 =
-      injectedNamesToPlugins$jscomp$inline_227[pluginName$jscomp$inline_229];
+    var pluginModule$jscomp$inline_235 =
+      injectedNamesToPlugins$jscomp$inline_232[pluginName$jscomp$inline_234];
     if (
-      !namesToPlugins.hasOwnProperty(pluginName$jscomp$inline_229) ||
-      namesToPlugins[pluginName$jscomp$inline_229] !==
-        pluginModule$jscomp$inline_230
+      !namesToPlugins.hasOwnProperty(pluginName$jscomp$inline_234) ||
+      namesToPlugins[pluginName$jscomp$inline_234] !==
+        pluginModule$jscomp$inline_235
     ) {
-      if (namesToPlugins[pluginName$jscomp$inline_229])
+      if (namesToPlugins[pluginName$jscomp$inline_234])
         throw Error(
           "EventPluginRegistry: Cannot inject two different event plugins using the same name, `" +
-            pluginName$jscomp$inline_229 +
+            pluginName$jscomp$inline_234 +
             "`."
         );
       namesToPlugins[
-        pluginName$jscomp$inline_229
-      ] = pluginModule$jscomp$inline_230;
-      isOrderingDirty$jscomp$inline_228 = !0;
+        pluginName$jscomp$inline_234
+      ] = pluginModule$jscomp$inline_235;
+      isOrderingDirty$jscomp$inline_233 = !0;
     }
   }
-isOrderingDirty$jscomp$inline_228 && recomputePluginOrdering();
+isOrderingDirty$jscomp$inline_233 && recomputePluginOrdering();
 var instanceCache = new Map(),
   instanceProps = new Map();
 function getInstanceFromTag(tag) {
@@ -2284,7 +2284,7 @@ function enqueueUpdate(fiber, update) {
     ((updateQueue = updateQueue.shared),
     null !== workInProgressRoot &&
     0 !== (fiber.mode & 1) &&
-    0 === (executionContext & 8)
+    0 === (executionContext & 2)
       ? ((fiber = updateQueue.interleaved),
         null === fiber
           ? ((update.next = update),
@@ -3121,60 +3121,49 @@ function ChildReconciler(shouldTrackSideEffects) {
     return iteratorFn;
   }
   return function(returnFiber, currentFirstChild, newChild, lanes) {
-    var isUnkeyedTopLevelFragment =
-      "object" === typeof newChild &&
+    "object" === typeof newChild &&
       null !== newChild &&
       newChild.type === REACT_FRAGMENT_TYPE &&
-      null === newChild.key;
-    isUnkeyedTopLevelFragment && (newChild = newChild.props.children);
+      null === newChild.key &&
+      (newChild = newChild.props.children);
     if ("object" === typeof newChild && null !== newChild) {
       switch (newChild.$$typeof) {
         case REACT_ELEMENT_TYPE:
           a: {
-            var key = newChild.key;
             for (
-              isUnkeyedTopLevelFragment = currentFirstChild;
-              null !== isUnkeyedTopLevelFragment;
+              var key = newChild.key, child = currentFirstChild;
+              null !== child;
 
             ) {
-              if (isUnkeyedTopLevelFragment.key === key) {
+              if (child.key === key) {
                 key = newChild.type;
                 if (key === REACT_FRAGMENT_TYPE) {
-                  if (7 === isUnkeyedTopLevelFragment.tag) {
-                    deleteRemainingChildren(
-                      returnFiber,
-                      isUnkeyedTopLevelFragment.sibling
-                    );
+                  if (7 === child.tag) {
+                    deleteRemainingChildren(returnFiber, child.sibling);
                     currentFirstChild = useFiber(
-                      isUnkeyedTopLevelFragment,
+                      child,
                       newChild.props.children
                     );
                     currentFirstChild.return = returnFiber;
                     returnFiber = currentFirstChild;
                     break a;
                   }
-                } else if (isUnkeyedTopLevelFragment.elementType === key) {
-                  deleteRemainingChildren(
-                    returnFiber,
-                    isUnkeyedTopLevelFragment.sibling
-                  );
-                  currentFirstChild = useFiber(
-                    isUnkeyedTopLevelFragment,
-                    newChild.props
-                  );
+                } else if (child.elementType === key) {
+                  deleteRemainingChildren(returnFiber, child.sibling);
+                  currentFirstChild = useFiber(child, newChild.props);
                   currentFirstChild.ref = coerceRef(
                     returnFiber,
-                    isUnkeyedTopLevelFragment,
+                    child,
                     newChild
                   );
                   currentFirstChild.return = returnFiber;
                   returnFiber = currentFirstChild;
                   break a;
                 }
-                deleteRemainingChildren(returnFiber, isUnkeyedTopLevelFragment);
+                deleteRemainingChildren(returnFiber, child);
                 break;
-              } else deleteChild(returnFiber, isUnkeyedTopLevelFragment);
-              isUnkeyedTopLevelFragment = isUnkeyedTopLevelFragment.sibling;
+              } else deleteChild(returnFiber, child);
+              child = child.sibling;
             }
             newChild.type === REACT_FRAGMENT_TYPE
               ? ((currentFirstChild = createFiberFromFragment(
@@ -3204,12 +3193,8 @@ function ChildReconciler(shouldTrackSideEffects) {
           return placeSingleChild(returnFiber);
         case REACT_PORTAL_TYPE:
           a: {
-            for (
-              isUnkeyedTopLevelFragment = newChild.key;
-              null !== currentFirstChild;
-
-            ) {
-              if (currentFirstChild.key === isUnkeyedTopLevelFragment)
+            for (child = newChild.key; null !== currentFirstChild; ) {
+              if (currentFirstChild.key === child)
                 if (
                   4 === currentFirstChild.tag &&
                   currentFirstChild.stateNode.containerInfo ===
@@ -3261,9 +3246,8 @@ function ChildReconciler(shouldTrackSideEffects) {
         );
       throwOnInvalidObjectType(returnFiber, newChild);
     }
-    if ("string" === typeof newChild || "number" === typeof newChild)
-      return (
-        (newChild = "" + newChild),
+    return "string" === typeof newChild || "number" === typeof newChild
+      ? ((newChild = "" + newChild),
         null !== currentFirstChild && 6 === currentFirstChild.tag
           ? (deleteRemainingChildren(returnFiber, currentFirstChild.sibling),
             (currentFirstChild = useFiber(currentFirstChild, newChild)),
@@ -3277,20 +3261,8 @@ function ChildReconciler(shouldTrackSideEffects) {
             )),
             (currentFirstChild.return = returnFiber),
             (returnFiber = currentFirstChild)),
-        placeSingleChild(returnFiber)
-      );
-    if ("undefined" === typeof newChild && !isUnkeyedTopLevelFragment)
-      switch (returnFiber.tag) {
-        case 1:
-        case 0:
-        case 11:
-        case 15:
-          throw Error(
-            (getComponentNameFromFiber(returnFiber) || "Component") +
-              "(...): Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null."
-          );
-      }
-    return deleteRemainingChildren(returnFiber, currentFirstChild);
+        placeSingleChild(returnFiber))
+      : deleteRemainingChildren(returnFiber, currentFirstChild);
   };
 }
 var reconcileChildFibers = ChildReconciler(!0),
@@ -3845,7 +3817,7 @@ function dispatchAction(fiber, queue, action) {
     if (
       null !== workInProgressRoot &&
       0 !== (fiber.mode & 1) &&
-      0 === (executionContext & 8)
+      0 === (executionContext & 2)
     ) {
       var interleaved = queue.interleaved;
       null === interleaved
@@ -4697,7 +4669,6 @@ function updateSuspenseComponent(current, workInProgress, renderLanes) {
   JSCompiler_temp
     ? ((showFallback = !0), (workInProgress.flags &= -129))
     : (null !== current && null === current.memoizedState) ||
-      void 0 === nextProps.fallback ||
       !0 === nextProps.unstable_avoidThisFallback ||
       (suspenseContext |= 1);
   push(suspenseStackCursor, suspenseContext & 1);
@@ -5287,7 +5258,11 @@ function completeWork(current, workInProgress, renderLanes) {
       newProps = null !== newProps;
       renderLanes = !1;
       null !== current && (renderLanes = null !== current.memoizedState);
-      if (newProps && !renderLanes && 0 !== (workInProgress.mode & 1))
+      if (
+        newProps &&
+        !renderLanes &&
+        ((workInProgress.child.flags |= 4096), 0 !== (workInProgress.mode & 1))
+      )
         if (
           (null === current &&
             !0 !== workInProgress.memoizedProps.unstable_avoidThisFallback) ||
@@ -5309,7 +5284,7 @@ function completeWork(current, workInProgress, renderLanes) {
               workInProgressRootRenderLanes
             );
         }
-      if (newProps || renderLanes) workInProgress.flags |= 4;
+      null !== workInProgress.updateQueue && (workInProgress.flags |= 4);
       bubbleProperties(workInProgress);
       0 !== (workInProgress.mode & 2) &&
         newProps &&
@@ -5468,11 +5443,16 @@ function completeWork(current, workInProgress, renderLanes) {
         null !== current &&
           (null !== current.memoizedState) !== renderLanes &&
           "unstable-defer-without-hiding" !== newProps.mode &&
-          (workInProgress.flags |= 4),
-        (renderLanes &&
-          0 === (subtreeRenderLanes & 1073741824) &&
-          0 !== (workInProgress.mode & 1)) ||
-          bubbleProperties(workInProgress),
+          23 !== workInProgress.tag &&
+          (workInProgress.flags |= 4096),
+        renderLanes && 0 !== (workInProgress.mode & 1)
+          ? 0 !== (subtreeRenderLanes & 1073741824) &&
+            (bubbleProperties(workInProgress),
+            23 !== workInProgress.tag &&
+              workInProgress.subtreeFlags & 6 &&
+              "unstable-defer-without-hiding" !== newProps.mode &&
+              (workInProgress.flags |= 4096))
+          : bubbleProperties(workInProgress),
         null
       );
   }
@@ -5656,68 +5636,6 @@ function commitHookEffectListMount(tag, finishedWork) {
     } while (effect !== finishedWork);
   }
 }
-function hideOrUnhideAllChildren(finishedWork, isHidden) {
-  for (var hostSubtreeRoot = null, node = finishedWork; ; ) {
-    if (5 === node.tag) {
-      if (null === hostSubtreeRoot) {
-        hostSubtreeRoot = node;
-        var instance = node.stateNode;
-        if (isHidden) {
-          var viewConfig = instance.viewConfig;
-          var updatePayload = diffProperties(
-            null,
-            emptyObject,
-            { style: { display: "none" } },
-            viewConfig.validAttributes
-          );
-          ReactNativePrivateInterface.UIManager.updateView(
-            instance._nativeTag,
-            viewConfig.uiViewClassName,
-            updatePayload
-          );
-        } else {
-          instance = node.stateNode;
-          updatePayload = node.memoizedProps;
-          viewConfig = instance.viewConfig;
-          var prevProps = Object.assign({}, updatePayload, {
-            style: [updatePayload.style, { display: "none" }]
-          });
-          updatePayload = diffProperties(
-            null,
-            prevProps,
-            updatePayload,
-            viewConfig.validAttributes
-          );
-          ReactNativePrivateInterface.UIManager.updateView(
-            instance._nativeTag,
-            viewConfig.uiViewClassName,
-            updatePayload
-          );
-        }
-      }
-    } else if (6 === node.tag) {
-      if (null === hostSubtreeRoot) throw Error("Not yet implemented.");
-    } else if (
-      ((22 !== node.tag && 23 !== node.tag) ||
-        null === node.memoizedState ||
-        node === finishedWork) &&
-      null !== node.child
-    ) {
-      node.child.return = node;
-      node = node.child;
-      continue;
-    }
-    if (node === finishedWork) break;
-    for (; null === node.sibling; ) {
-      if (null === node.return || node.return === finishedWork) return;
-      hostSubtreeRoot === node && (hostSubtreeRoot = null);
-      node = node.return;
-    }
-    hostSubtreeRoot === node && (hostSubtreeRoot = null);
-    node.sibling.return = node.return;
-    node = node.sibling;
-  }
-}
 function commitUnmount(finishedRoot, current, nearestMountedAncestor) {
   if (injectedHook && "function" === typeof injectedHook.onCommitFiberUnmount)
     try {
@@ -6113,9 +6031,6 @@ function commitWork(current, finishedWork) {
     case 12:
       return;
     case 13:
-      null !== finishedWork.memoizedState &&
-        ((globalMostRecentFallbackTime = now()),
-        hideOrUnhideAllChildren(finishedWork.child, !0));
       attachSuspenseRetryListeners(finishedWork);
       return;
     case 19:
@@ -6123,13 +6038,6 @@ function commitWork(current, finishedWork) {
       return;
     case 17:
       return;
-    case 22:
-    case 23:
-      hideOrUnhideAllChildren(
-        finishedWork,
-        null !== finishedWork.memoizedState
-      );
-      return;
   }
   throw Error(
     "This unit of work tag should not have side-effects. This error is likely caused by a bug in React. Please file an issue."
@@ -6201,6 +6109,87 @@ function commitMutationEffects(root, firstChild, committedLanes) {
                 else currentRef.current = null;
             }
           }
+          if (flags & 4096)
+            switch (firstChild.tag) {
+              case 13:
+                if (null !== firstChild.memoizedState) {
+                  var current$95 = firstChild.alternate;
+                  if (null === current$95 || null === current$95.memoizedState)
+                    globalMostRecentFallbackTime = now();
+                }
+                break;
+              case 22:
+                a: {
+                  committedLanes = firstChild;
+                  var isHidden = null !== firstChild.memoizedState;
+                  i = null;
+                  for (childToDelete = committedLanes; ; ) {
+                    if (5 === childToDelete.tag) {
+                      if (null === i) {
+                        i = childToDelete;
+                        var instance = childToDelete.stateNode;
+                        if (isHidden) {
+                          var instance$jscomp$0 = instance,
+                            viewConfig = instance$jscomp$0.viewConfig;
+                          var updatePayload = diffProperties(
+                            null,
+                            emptyObject,
+                            { style: { display: "none" } },
+                            viewConfig.validAttributes
+                          );
+                          ReactNativePrivateInterface.UIManager.updateView(
+                            instance$jscomp$0._nativeTag,
+                            viewConfig.uiViewClassName,
+                            updatePayload
+                          );
+                        } else {
+                          var instance$jscomp$1 = childToDelete.stateNode,
+                            props = childToDelete.memoizedProps,
+                            viewConfig$jscomp$0 = instance$jscomp$1.viewConfig,
+                            prevProps = Object.assign({}, props, {
+                              style: [props.style, { display: "none" }]
+                            });
+                          var updatePayload$jscomp$0 = diffProperties(
+                            null,
+                            prevProps,
+                            props,
+                            viewConfig$jscomp$0.validAttributes
+                          );
+                          ReactNativePrivateInterface.UIManager.updateView(
+                            instance$jscomp$1._nativeTag,
+                            viewConfig$jscomp$0.uiViewClassName,
+                            updatePayload$jscomp$0
+                          );
+                        }
+                      }
+                    } else if (6 === childToDelete.tag) {
+                      if (null === i) throw Error("Not yet implemented.");
+                    } else if (
+                      ((22 !== childToDelete.tag && 23 !== childToDelete.tag) ||
+                        null === childToDelete.memoizedState ||
+                        childToDelete === committedLanes) &&
+                      null !== childToDelete.child
+                    ) {
+                      childToDelete.child.return = childToDelete;
+                      childToDelete = childToDelete.child;
+                      continue;
+                    }
+                    if (childToDelete === committedLanes) break;
+                    for (; null === childToDelete.sibling; ) {
+                      if (
+                        null === childToDelete.return ||
+                        childToDelete.return === committedLanes
+                      )
+                        break a;
+                      i === childToDelete && (i = null);
+                      childToDelete = childToDelete.return;
+                    }
+                    i === childToDelete && (i = null);
+                    childToDelete.sibling.return = childToDelete.return;
+                    childToDelete = childToDelete.sibling;
+                  }
+                }
+            }
           switch (flags & 2054) {
             case 2:
               commitPlacement(firstChild);
@@ -6242,16 +6231,16 @@ function commitLayoutEffects(finishedWork, root, committedLanes) {
     if (
       ((root = nextEffect),
       (committedLanes = root.child),
-      0 !== (root.subtreeFlags & 324) && null !== committedLanes)
+      0 !== (root.subtreeFlags & 4420) && null !== committedLanes)
     )
       (committedLanes.return = root), (nextEffect = committedLanes);
     else
       for (root = finishedWork; null !== nextEffect; ) {
         committedLanes = nextEffect;
-        if (0 !== (committedLanes.flags & 324)) {
+        if (0 !== (committedLanes.flags & 4420)) {
           var current = committedLanes.alternate;
           try {
-            if (0 !== (committedLanes.flags & 68))
+            if (0 !== (committedLanes.flags & 4420))
               switch (committedLanes.tag) {
                 case 0:
                 case 11:
@@ -6459,7 +6448,7 @@ var ceil = Math.ceil,
   currentEventTime = -1,
   currentEventTransitionLane = 0;
 function requestEventTime() {
-  return 0 !== (executionContext & 24)
+  return 0 !== (executionContext & 6)
     ? now()
     : -1 !== currentEventTime
     ? currentEventTime
@@ -6467,7 +6456,7 @@ function requestEventTime() {
 }
 function requestUpdateLane(fiber) {
   if (0 === (fiber.mode & 1)) return 1;
-  if (0 !== (executionContext & 8) && 0 !== workInProgressRootRenderLanes)
+  if (0 !== (executionContext & 2) && 0 !== workInProgressRootRenderLanes)
     return workInProgressRootRenderLanes & -workInProgressRootRenderLanes;
   if (0 !== ReactCurrentBatchConfig.transition)
     return (
@@ -6493,18 +6482,15 @@ function scheduleUpdateOnFiber(fiber, lane, eventTime) {
   isDevToolsPresent && addFiberToLanesMap(root, fiber, lane);
   markRootUpdated(root, lane, eventTime);
   root === workInProgressRoot &&
-    (0 === (executionContext & 8) && (workInProgressRootUpdatedLanes |= lane),
+    (0 === (executionContext & 2) && (workInProgressRootUpdatedLanes |= lane),
     4 === workInProgressRootExitStatus &&
       markRootSuspended$1(root, workInProgressRootRenderLanes));
-  1 === lane
-    ? 0 !== (executionContext & 4) && 0 === (executionContext & 24)
-      ? performSyncWorkOnRoot(root)
-      : (ensureRootIsScheduled(root, eventTime),
-        0 === executionContext &&
-          0 === (fiber.mode & 1) &&
-          ((workInProgressRootRenderTargetTime = now() + 500),
-          includesLegacySyncCallbacks && flushSyncCallbacks()))
-    : ensureRootIsScheduled(root, eventTime);
+  ensureRootIsScheduled(root, eventTime);
+  1 === lane &&
+    0 === executionContext &&
+    0 === (fiber.mode & 1) &&
+    ((workInProgressRootRenderTargetTime = now() + 500),
+    includesLegacySyncCallbacks && flushSyncCallbacks());
   return root;
 }
 function markUpdateLaneFromFiberToRoot(sourceFiber, lane) {
@@ -6595,7 +6581,7 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
   nestedUpdateScheduled = currentUpdateIsNested = !1;
   currentEventTime = -1;
   currentEventTransitionLane = 0;
-  if (0 !== (executionContext & 24))
+  if (0 !== (executionContext & 6))
     throw Error("Should not already be working.");
   var originalCallbackNode = root.callbackNode;
   if (flushPassiveEffects() && root.callbackNode !== originalCallbackNode)
@@ -6614,7 +6600,7 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
   if (JSCompiler_inline_result && !didTimeout) {
     didTimeout = lanes;
     JSCompiler_inline_result = executionContext;
-    executionContext |= 8;
+    executionContext |= 2;
     var prevDispatcher = pushDispatcher();
     if (
       workInProgressRoot !== root ||
@@ -6649,12 +6635,14 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
   } else didTimeout = renderRootSync(root, lanes);
   if (0 !== didTimeout) {
     2 === didTimeout &&
-      ((executionContext |= 32),
+      ((JSCompiler_inline_result = executionContext),
+      (executionContext |= 8),
       root.hydrate && (root.hydrate = !1),
-      (JSCompiler_inline_result = getLanesToRetrySynchronouslyOnError(root)),
-      0 !== JSCompiler_inline_result &&
-        ((lanes = JSCompiler_inline_result),
-        (didTimeout = renderRootSync(root, JSCompiler_inline_result))));
+      (prevDispatcher = getLanesToRetrySynchronouslyOnError(root)),
+      0 !== prevDispatcher &&
+        ((lanes = prevDispatcher),
+        (didTimeout = renderRootSync(root, prevDispatcher))),
+      (executionContext = JSCompiler_inline_result));
     if (1 === didTimeout)
       throw ((originalCallbackNode = workInProgressRootFatalError),
       prepareFreshStack(root, 0),
@@ -6755,18 +6743,20 @@ function markRootSuspended$1(root, suspendedLanes) {
 function performSyncWorkOnRoot(root) {
   currentUpdateIsNested = nestedUpdateScheduled;
   nestedUpdateScheduled = !1;
-  if (0 !== (executionContext & 24))
+  if (0 !== (executionContext & 6))
     throw Error("Should not already be working.");
   flushPassiveEffects();
   var lanes = getNextLanes(root, 0);
   if (0 === (lanes & 1)) return ensureRootIsScheduled(root, now()), null;
   var exitStatus = renderRootSync(root, lanes);
   if (0 !== root.tag && 2 === exitStatus) {
-    executionContext |= 32;
+    var prevExecutionContext = executionContext;
+    executionContext |= 8;
     root.hydrate && (root.hydrate = !1);
     var errorRetryLanes = getLanesToRetrySynchronouslyOnError(root);
     0 !== errorRetryLanes &&
       ((lanes = errorRetryLanes), (exitStatus = renderRootSync(root, lanes)));
+    executionContext = prevExecutionContext;
   }
   if (1 === exitStatus)
     throw ((exitStatus = workInProgressRootFatalError),
@@ -6917,19 +6907,17 @@ function handleError(root$jscomp$0, thrownValue) {
             var JSCompiler_temp;
             if ((JSCompiler_temp = 13 === workInProgress$34.tag)) {
               var nextState = workInProgress$34.memoizedState;
-              if (null !== nextState)
-                JSCompiler_temp = null !== nextState.dehydrated ? !0 : !1;
-              else {
-                var props = workInProgress$34.memoizedProps;
-                JSCompiler_temp =
-                  void 0 === props.fallback
-                    ? !1
-                    : !0 !== props.unstable_avoidThisFallback
+              JSCompiler_temp =
+                null !== nextState
+                  ? null !== nextState.dehydrated
                     ? !0
-                    : hasInvisibleParentBoundary
-                    ? !1
-                    : !0;
-              }
+                    : !1
+                  : !0 !==
+                    workInProgress$34.memoizedProps.unstable_avoidThisFallback
+                  ? !0
+                  : hasInvisibleParentBoundary
+                  ? !1
+                  : !0;
             }
             if (JSCompiler_temp) {
               var wakeables = workInProgress$34.updateQueue;
@@ -7050,7 +7038,7 @@ function pushDispatcher() {
 }
 function renderRootSync(root, lanes) {
   var prevExecutionContext = executionContext;
-  executionContext |= 8;
+  executionContext |= 2;
   var prevDispatcher = pushDispatcher();
   if (workInProgressRoot !== root || workInProgressRootRenderLanes !== lanes) {
     if (isDevToolsPresent) {
@@ -7165,7 +7153,7 @@ function commitRoot(root) {
 function commitRootImpl(root, renderPriorityLevel) {
   do flushPassiveEffects();
   while (null !== rootWithPendingPassiveEffects);
-  if (0 !== (executionContext & 24))
+  if (0 !== (executionContext & 6))
     throw Error("Should not already be working.");
   var finishedWork = root.finishedWork,
     lanes = root.finishedLanes;
@@ -7198,7 +7186,7 @@ function commitRootImpl(root, renderPriorityLevel) {
     var previousPriority = currentUpdatePriority;
     currentUpdatePriority = 1;
     var prevExecutionContext = executionContext;
-    executionContext |= 16;
+    executionContext |= 4;
     ReactCurrentOwner$2.current = null;
     commitBeforeMutationEffects(root, finishedWork);
     commitTime = now$1();
@@ -7230,7 +7218,6 @@ function commitRootImpl(root, renderPriorityLevel) {
     (root = firstUncaughtError),
     (firstUncaughtError = null),
     root);
-  if (0 !== (executionContext & 4)) return null;
   0 !== (pendingPassiveEffectsLanes & 1) &&
     0 !== root.tag &&
     flushPassiveEffects();
@@ -7251,10 +7238,10 @@ function flushPassiveEffects() {
         renderPriority = rootWithPendingPassiveEffects;
         rootWithPendingPassiveEffects = null;
         pendingPassiveEffectsLanes = 0;
-        if (0 !== (executionContext & 24))
+        if (0 !== (executionContext & 6))
           throw Error("Cannot flush passive effects while already rendering.");
         var prevExecutionContext = executionContext;
-        executionContext |= 16;
+        executionContext |= 4;
         for (nextEffect = renderPriority.current; null !== nextEffect; ) {
           var fiber = nextEffect,
             child = fiber.child;
@@ -8358,6 +8345,95 @@ function updateContainer(element, container, parentComponent, callback) {
 function emptyFindFiberByHostInstance() {
   return null;
 }
+var emptyObject$1 = {},
+  createHierarchy,
+  getHostNode,
+  getHostProps,
+  lastNonHostInstance,
+  getOwnerHierarchy,
+  traverseOwnerTreeUp;
+createHierarchy = function(fiberHierarchy) {
+  return fiberHierarchy.map(function(fiber) {
+    return {
+      name: getComponentNameFromType(fiber.type),
+      getInspectorData: function(findNodeHandle) {
+        return {
+          props: getHostProps(fiber),
+          source: fiber._debugSource,
+          measure: function(callback) {
+            var hostFiber = findCurrentHostFiber(fiber);
+            if (
+              (hostFiber =
+                null != hostFiber &&
+                null !== hostFiber.stateNode &&
+                hostFiber.stateNode.node)
+            )
+              nativeFabricUIManager.measure(hostFiber, callback);
+            else
+              return ReactNativePrivateInterface.UIManager.measure(
+                getHostNode(fiber, findNodeHandle),
+                callback
+              );
+          }
+        };
+      }
+    };
+  });
+};
+getHostNode = function(fiber, findNodeHandle) {
+  for (var hostNode; fiber; ) {
+    null !== fiber.stateNode &&
+      5 === fiber.tag &&
+      (hostNode = findNodeHandle(fiber.stateNode));
+    if (hostNode) return hostNode;
+    fiber = fiber.child;
+  }
+  return null;
+};
+getHostProps = function(fiber) {
+  return (fiber = findCurrentHostFiber(fiber))
+    ? fiber.memoizedProps || emptyObject$1
+    : emptyObject$1;
+};
+exports.getInspectorDataForInstance = function(closestInstance) {
+  if (!closestInstance)
+    return {
+      hierarchy: [],
+      props: emptyObject$1,
+      selectedIndex: null,
+      source: null
+    };
+  closestInstance = findCurrentFiberUsingSlowPath(closestInstance);
+  var fiberHierarchy = getOwnerHierarchy(closestInstance),
+    instance = lastNonHostInstance(fiberHierarchy);
+  closestInstance = createHierarchy(fiberHierarchy);
+  var props = getHostProps(instance),
+    source = instance._debugSource;
+  fiberHierarchy = fiberHierarchy.indexOf(instance);
+  return {
+    hierarchy: closestInstance,
+    props: props,
+    selectedIndex: fiberHierarchy,
+    source: source
+  };
+};
+getOwnerHierarchy = function(instance) {
+  var hierarchy = [];
+  traverseOwnerTreeUp(hierarchy, instance);
+  return hierarchy;
+};
+lastNonHostInstance = function(hierarchy) {
+  for (var i = hierarchy.length - 1; 1 < i; i--) {
+    var instance = hierarchy[i];
+    if (5 !== instance.tag) return instance;
+  }
+  return hierarchy[0];
+};
+traverseOwnerTreeUp = function(hierarchy, instance) {
+  instance &&
+    (hierarchy.unshift(instance),
+    traverseOwnerTreeUp(hierarchy, instance._debugOwner));
+};
 function findNodeHandle(componentOrHandle) {
   if (null == componentOrHandle) return null;
   if ("number" === typeof componentOrHandle) return componentOrHandle;
@@ -8391,10 +8467,10 @@ batchedUpdatesImpl = function(fn, a) {
   }
 };
 var roots = new Map(),
-  devToolsConfig$jscomp$inline_1013 = {
+  devToolsConfig$jscomp$inline_1011 = {
     findFiberByHostInstance: getInstanceFromTag,
     bundleType: 0,
-    version: "18.0.0-cae635054-20210626",
+    version: "18.0.0-419cc9c37-20210726",
     rendererPackageName: "react-native-renderer",
     rendererConfig: {
       getInspectorDataForViewTag: function() {
@@ -8409,11 +8485,11 @@ var roots = new Map(),
       }.bind(null, findNodeHandle)
     }
   };
-var internals$jscomp$inline_1287 = {
-  bundleType: devToolsConfig$jscomp$inline_1013.bundleType,
-  version: devToolsConfig$jscomp$inline_1013.version,
-  rendererPackageName: devToolsConfig$jscomp$inline_1013.rendererPackageName,
-  rendererConfig: devToolsConfig$jscomp$inline_1013.rendererConfig,
+var internals$jscomp$inline_1278 = {
+  bundleType: devToolsConfig$jscomp$inline_1011.bundleType,
+  version: devToolsConfig$jscomp$inline_1011.version,
+  rendererPackageName: devToolsConfig$jscomp$inline_1011.rendererPackageName,
+  rendererConfig: devToolsConfig$jscomp$inline_1011.rendererConfig,
   overrideHookState: null,
   overrideHookStateDeletePath: null,
   overrideHookStateRenamePath: null,
@@ -8429,26 +8505,26 @@ var internals$jscomp$inline_1287 = {
     return null === fiber ? null : fiber.stateNode;
   },
   findFiberByHostInstance:
-    devToolsConfig$jscomp$inline_1013.findFiberByHostInstance ||
+    devToolsConfig$jscomp$inline_1011.findFiberByHostInstance ||
     emptyFindFiberByHostInstance,
   findHostInstancesForRefresh: null,
   scheduleRefresh: null,
   scheduleRoot: null,
   setRefreshHandler: null,
   getCurrentFiber: null,
-  reconcilerVersion: "18.0.0-cae635054-20210626"
+  reconcilerVersion: "18.0.0-419cc9c37-20210726"
 };
 if ("undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__) {
-  var hook$jscomp$inline_1288 = __REACT_DEVTOOLS_GLOBAL_HOOK__;
+  var hook$jscomp$inline_1279 = __REACT_DEVTOOLS_GLOBAL_HOOK__;
   if (
-    !hook$jscomp$inline_1288.isDisabled &&
-    hook$jscomp$inline_1288.supportsFiber
+    !hook$jscomp$inline_1279.isDisabled &&
+    hook$jscomp$inline_1279.supportsFiber
   )
     try {
-      (rendererID = hook$jscomp$inline_1288.inject(
-        internals$jscomp$inline_1287
+      (rendererID = hook$jscomp$inline_1279.inject(
+        internals$jscomp$inline_1278
       )),
-        (injectedHook = hook$jscomp$inline_1288);
+        (injectedHook = hook$jscomp$inline_1279);
     } catch (err) {}
 }
 exports.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED = {
@@ -8468,12 +8544,10 @@ exports.createPortal = function(children, containerTag) {
 };
 exports.dispatchCommand = function(handle, command, args) {
   null != handle._nativeTag &&
-    (handle._internalInstanceHandle
-      ? nativeFabricUIManager.dispatchCommand(
-          handle._internalInstanceHandle.stateNode.node,
-          command,
-          args
-        )
+    (null != handle._internalInstanceHandle
+      ? ((handle = handle._internalInstanceHandle.stateNode),
+        null != handle &&
+          nativeFabricUIManager.dispatchCommand(handle.node, command, args))
       : ReactNativePrivateInterface.UIManager.dispatchViewManagerCommand(
           handle._nativeTag,
           command,
@@ -8525,11 +8599,10 @@ exports.render = function(element, containerTag, callback) {
 };
 exports.sendAccessibilityEvent = function(handle, eventType) {
   null != handle._nativeTag &&
-    (handle._internalInstanceHandle
-      ? nativeFabricUIManager.sendAccessibilityEvent(
-          handle._internalInstanceHandle.stateNode.node,
-          eventType
-        )
+    (null != handle._internalInstanceHandle
+      ? ((handle = handle._internalInstanceHandle.stateNode),
+        null != handle &&
+          nativeFabricUIManager.sendAccessibilityEvent(handle.node, eventType))
       : ReactNativePrivateInterface.legacySendAccessibilityEvent(
           handle._nativeTag,
           eventType