[EuiContextMenuPanel] Allow consumers to disable initial focus via `i…

…nitialFocusedItemIndex={-1}` (#8101)

packages/eui/changelogs/upcoming/8101.md

@@ -0,0 +1 @@
+- Updated `EuiContextMenuPanel` to allow disabling initial focus via `initialFocusedItemIndex={-1}`

packages/eui/src/components/context_menu/context_menu_panel.spec.tsx

@@ -231,6 +231,52 @@ describe('EuiContextMenuPanel', () => {
         cy.focused().should('have.attr', 'data-test-subj', 'popoverToggle');
       });
     });
+
+    describe('disabling auto focus', () => {
+      it('does not focus anything if initialFocusedItemIndex is set to -1', () => {
+        cy.mount(
+          <EuiContextMenuPanel initialFocusedItemIndex={-1}>
+            {children}
+          </EuiContextMenuPanel>
+        );
+        cy.focused().should('not.exist');
+      });
+
+      it('does not focus the back button if it exists', () => {
+        cy.mount(
+          <EuiContextMenuPanel
+            initialFocusedItemIndex={-1}
+            onClose={() => {}}
+            title="Test"
+            items={items}
+          />
+        );
+        cy.focused().should('not.exist');
+      });
+
+      it('still allows for manually tabbing to the panel and using up/down key navigation', () => {
+        cy.realMount(
+          <EuiContextMenuPanel initialFocusedItemIndex={-1} items={items} />
+        );
+        cy.realPress('Tab');
+        cy.focused().should('have.attr', 'data-test-subj', 'itemA');
+        cy.realPress('{downarrow}');
+        cy.focused().should('have.attr', 'data-test-subj', 'itemB');
+      });
+
+      it('other children with `autoFocus` should take focus', () => {
+        cy.mount(
+          <EuiContextMenuPanel
+            initialFocusedItemIndex={-1}
+            items={[
+              ...items,
+              <input type="text" value="Auto focus test" autoFocus />,
+            ]}
+          />
+        );
+        cy.focused().should('have.value', 'Auto focus test');
+      });
+    });
   });
 
   describe('Keyboard navigation of items', () => {

packages/eui/src/components/context_menu/context_menu_panel.tsx

@@ -46,6 +46,12 @@ export type EuiContextMenuPanelProps = PropsWithChildren &
     HTMLAttributes<HTMLDivElement>,
     'onKeyDown' | 'tabIndex' | 'onAnimationEnd' | 'title'
   > & {
+    /**
+     * Determines the initially focused menu item for keyboard and screen reader users.
+     *
+     * Can be set to `-1` to prevent autofocus (an uncommon case that must have
+     * keyboard accessibility accounted for manually if used)
+     */
     initialFocusedItemIndex?: number;
     items?: ReactElement[];
     onClose?: NoArgCallback<void>;
@@ -99,7 +105,9 @@ export class EuiContextMenuPanelClass extends Component<
       },
       menuItems: [],
       focusedItemIndex:
-        props.onClose && props.initialFocusedItemIndex != null
+        props.onClose &&
+        props.initialFocusedItemIndex != null &&
+        props.initialFocusedItemIndex !== -1
           ? props.initialFocusedItemIndex + 1 // Account for panel title back button
           : props.initialFocusedItemIndex,
       currentHeight: undefined,
@@ -257,6 +265,13 @@ export class EuiContextMenuPanelClass extends Component<
         return;
       }
 
+      // `initialFocusedItemIndex={-1}` should only be used when preventing initial item focus is desired
+      if (this.state.focusedItemIndex === -1) {
+        // Resetting the focusedItemIndex to 0 allows keyboard up/down behavior to
+        // still work correctly later if the panel is manually tabbed into
+        return this.setState({ tookInitialFocus: true, focusedItemIndex: 0 });
+      }
+
       // If an item should be focused, focus it (if it exists)
       if (this.state.focusedItemIndex != null && this.state.menuItems.length) {
         const focusedItem = this.state.menuItems[this.state.focusedItemIndex];