Remove form event delegation flag (#19395)

Author: gaearon

packages/react-dom/src/__tests__/ReactDOMEventListener-test.js

@@ -278,10 +278,10 @@ describe('ReactDOMEventListener', () => {
     document.body.removeChild(container);
   });
 
-  // This is a special case for submit and reset events as they are listened on
-  // at the element level and not the document.
-  // @see https://github.com/facebook/react/pull/13462
-  it('should (or not) receive submit events if native, interim DOM handler prevents it', () => {
+  // This tests an implementation detail that submit/reset events are listened to
+  // at the document level, which is necessary for event replaying to work.
+  // They bubble in all modern browsers.
+  it('should not receive submit events if native, interim DOM handler prevents it', () => {
     const container = document.createElement('div');
     document.body.appendChild(container);
 
@@ -316,13 +316,8 @@ describe('ReactDOMEventListener', () => {
         }),
       );
 
-      if (gate(flags => flags.enableFormEventDelegation)) {
-        expect(handleSubmit).not.toHaveBeenCalled();
-        expect(handleReset).not.toHaveBeenCalled();
-      } else {
-        expect(handleSubmit).toHaveBeenCalled();
-        expect(handleReset).toHaveBeenCalled();
-      }
+      expect(handleSubmit).not.toHaveBeenCalled();
+      expect(handleReset).not.toHaveBeenCalled();
     } finally {
       document.body.removeChild(container);
     }

packages/react-dom/src/events/DOMModernPluginEventSystem.js

@@ -43,8 +43,6 @@ import {
   TOP_INVALID,
   TOP_SCROLL,
   TOP_CLOSE,
-  TOP_RESET,
-  TOP_SUBMIT,
   TOP_CAN_PLAY,
   TOP_CAN_PLAY_THROUGH,
   TOP_DURATION_CHANGE,
@@ -83,7 +81,6 @@ import getListener from './getListener';
 import {passiveBrowserEventsSupported} from './checkPassiveEvents';
 
 import {
-  enableFormEventDelegation,
   enableLegacyFBSupport,
   enableCreateEventHandleAPI,
   enableScopeAPI,
@@ -244,11 +241,6 @@ export const capturePhaseEvents: Set<DOMTopLevelEventType> = new Set([
   TOP_WAITING,
 ]);
 
-if (!enableFormEventDelegation) {
-  capturePhaseEvents.add(TOP_SUBMIT);
-  capturePhaseEvents.add(TOP_RESET);
-}
-
 if (enableCreateEventHandleAPI) {
   capturePhaseEvents.add(TOP_AFTER_BLUR);
 }

packages/shared/ReactFeatureFlags.js

@@ -127,6 +127,3 @@ export const deferRenderPhaseUpdateToNextBatch = true;
 
 // Replacement for runWithPriority in React internals.
 export const decoupleUpdatePriorityFromScheduler = false;
-
-// Enables delegation for submit and reset events.
-export const enableFormEventDelegation = false;

packages/shared/forks/ReactFeatureFlags.native-fb.js

@@ -44,7 +44,6 @@ export const warnAboutSpreadingKeyToJSX = false;
 export const enableComponentStackLocations = false;
 export const enableLegacyFBSupport = false;
 export const enableFilterEmptyStringAttributesDOM = false;
-export const enableFormEventDelegation = false;
 
 export const enableNewReconciler = false;
 export const deferRenderPhaseUpdateToNextBatch = true;

packages/shared/forks/ReactFeatureFlags.native-oss.js

@@ -43,7 +43,6 @@ export const warnAboutSpreadingKeyToJSX = false;
 export const enableComponentStackLocations = false;
 export const enableLegacyFBSupport = false;
 export const enableFilterEmptyStringAttributesDOM = false;
-export const enableFormEventDelegation = false;
 
 export const enableNewReconciler = false;
 export const deferRenderPhaseUpdateToNextBatch = true;

packages/shared/forks/ReactFeatureFlags.test-renderer.js

@@ -43,7 +43,6 @@ export const warnAboutSpreadingKeyToJSX = false;
 export const enableComponentStackLocations = true;
 export const enableLegacyFBSupport = false;
 export const enableFilterEmptyStringAttributesDOM = false;
-export const enableFormEventDelegation = false;
 
 export const enableNewReconciler = false;
 export const deferRenderPhaseUpdateToNextBatch = true;

packages/shared/forks/ReactFeatureFlags.test-renderer.www.js

@@ -43,7 +43,6 @@ export const warnAboutSpreadingKeyToJSX = false;
 export const enableComponentStackLocations = true;
 export const enableLegacyFBSupport = false;
 export const enableFilterEmptyStringAttributesDOM = false;
-export const enableFormEventDelegation = false;
 
 export const enableNewReconciler = false;
 export const deferRenderPhaseUpdateToNextBatch = true;

packages/shared/forks/ReactFeatureFlags.testing.js

@@ -43,7 +43,6 @@ export const warnAboutSpreadingKeyToJSX = false;
 export const enableComponentStackLocations = true;
 export const enableLegacyFBSupport = false;
 export const enableFilterEmptyStringAttributesDOM = false;
-export const enableFormEventDelegation = false;
 
 export const enableNewReconciler = false;
 export const deferRenderPhaseUpdateToNextBatch = true;

packages/shared/forks/ReactFeatureFlags.testing.www.js

@@ -43,7 +43,6 @@ export const warnAboutSpreadingKeyToJSX = false;
 export const enableComponentStackLocations = true;
 export const enableLegacyFBSupport = !__EXPERIMENTAL__;
 export const enableFilterEmptyStringAttributesDOM = false;
-export const enableFormEventDelegation = false;
 
 export const enableNewReconciler = false;
 export const deferRenderPhaseUpdateToNextBatch = true;

packages/shared/forks/ReactFeatureFlags.www-dynamic.js

@@ -43,5 +43,3 @@ export const replayFailedUnitOfWorkWithInvokeGuardedCallback = __DEV__;
 // to __VARIANT__.
 export const enableTrustedTypesIntegration = false;
 export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
-
-export const enableFormEventDelegation = __VARIANT__;