Port #380

baselines/dom.generated.d.ts

@@ -9301,7 +9301,7 @@ interface MutationRecord {
     readonly previousSibling: Node | null;
     readonly removedNodes: NodeList;
     readonly target: Node;
-    readonly type: string;
+    readonly type: MutationRecordType;
 }
 
 declare var MutationRecord: {
@@ -15995,6 +15995,7 @@ type HeadersInit = Headers | string[][] | { [key: string]: string };
 type OrientationLockType = "any" | "natural" | "portrait" | "landscape" | "portrait-primary" | "portrait-secondary" | "landscape-primary"| "landscape-secondary";
 type IDBValidKey = number | string | Date | IDBArrayKey;
 type AlgorithmIdentifier = string | Algorithm;
+type MutationRecordType = "attributes" | "characterData" | "childList";
 type AppendMode = "segments" | "sequence";
 type AudioContextLatencyCategory = "balanced" | "interactive" | "playback";
 type AudioContextState = "suspended" | "running" | "closed";

inputfiles/addedTypes.json

@@ -2827,6 +2827,10 @@
             {
                 "override-type": "string | Algorithm",
                 "new-type": "AlgorithmIdentifier"
+            },
+            {
+                "new-type": "MutationRecordType",
+                "override-type": "\"attributes\" | \"characterData\" | \"childList\""
             }
         ]
     }

inputfiles/overridingTypes.json

@@ -1724,6 +1724,17 @@
                         }
                     }
                 }
+            },
+            "MutationRecord": {
+                "name": "MutationRecord",
+                "properties": {
+                    "property": {
+                        "type": {
+                            "name": "type",
+                            "override-type": "MutationRecordType"
+                        }
+                    }
+                }
             }
         }
     },