Set fragment export flags to true (#11672)

Author: clemmy

packages/react-cs-renderer/src/ReactNativeCSFeatureFlags.js

@@ -15,7 +15,6 @@ import typeof * as CSFeatureFlagsType from './ReactNativeCSFeatureFlags';
 export const debugRenderPhaseSideEffects = false;
 export const enableAsyncSubtreeAPI = true;
 export const enableAsyncSchedulingByDefaultInReactDOM = false;
-export const enableReactFragment = false;
 export const enableCreateRoot = false;
 export const enableUserTimingAPI = __DEV__;
 

packages/react-dom/src/__tests__/ReactDOMServerIntegrationFragment-test.internal.js

@@ -18,7 +18,6 @@ let ReactDOMServer;
 function initModules() {
   // Reset warning cache.
   jest.resetModuleRegistry();
-  require('shared/ReactFeatureFlags').enableReactFragment = true;
   React = require('react');
   ReactDOM = require('react-dom');
   ReactDOMServer = require('react-dom/server');

packages/react-native-renderer/src/ReactNativeFeatureFlags.js

@@ -18,7 +18,6 @@ export const {debugRenderPhaseSideEffects} = require('ReactFeatureFlags');
 // The rest of the flags are static for better dead code elimination.
 export const enableAsyncSubtreeAPI = true;
 export const enableAsyncSchedulingByDefaultInReactDOM = false;
-export const enableReactFragment = false;
 export const enableCreateRoot = false;
 export const enableUserTimingAPI = __DEV__;
 export const enableMutatingReconciler = true;

packages/react-reconciler/src/ReactChildFiber.js

@@ -12,7 +12,6 @@ import type {ReactCall, ReactPortal, ReactReturn} from 'shared/ReactTypes';
 import type {Fiber} from 'react-reconciler/src/ReactFiber';
 import type {ExpirationTime} from 'react-reconciler/src/ReactFiberExpirationTime';
 
-import {enableReactFragment} from 'shared/ReactFeatureFlags';
 import {Placement, Deletion} from 'shared/ReactTypeOfSideEffect';
 import {
   getIteratorFn,
@@ -1376,7 +1375,6 @@ function ChildReconciler(shouldTrackSideEffects) {
     // This leads to an ambiguity between <>{[...]}</> and <>...</>.
     // We treat the ambiguous cases above the same.
     if (
-      enableReactFragment &&
       typeof newChild === 'object' &&
       newChild !== null &&
       newChild.type === REACT_FRAGMENT_TYPE &&

packages/react-reconciler/src/__tests__/ReactFragment-test.internal.js

@@ -15,9 +15,6 @@ describe('ReactFragment', () => {
   beforeEach(function() {
     jest.resetModules();
 
-    const ReactFeatureFlags = require('shared/ReactFeatureFlags');
-    ReactFeatureFlags.enableReactFragment = true;
-
     React = require('react');
     ReactNoop = require('react-noop-renderer');
   });

packages/react/src/React.js

@@ -7,7 +7,6 @@
 
 import assign from 'object-assign';
 import ReactVersion from 'shared/ReactVersion';
-import {enableReactFragment} from 'shared/ReactFeatureFlags';
 import {REACT_FRAGMENT_TYPE} from 'shared/ReactSymbols';
 
 import {Component, PureComponent, AsyncComponent} from './ReactBaseClasses';
@@ -39,6 +38,8 @@ var React = {
   PureComponent,
   unstable_AsyncComponent: AsyncComponent,
 
+  Fragment: REACT_FRAGMENT_TYPE,
+
   createElement: __DEV__ ? createElementWithValidation : createElement,
   cloneElement: __DEV__ ? cloneElementWithValidation : cloneElement,
   createFactory: __DEV__ ? createFactoryWithValidation : createFactory,
@@ -53,10 +54,6 @@ var React = {
   },
 };
 
-if (enableReactFragment) {
-  React.Fragment = REACT_FRAGMENT_TYPE;
-}
-
 if (__DEV__) {
   Object.assign(React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED, {
     // These should not be included in production.

packages/react/src/__tests__/ReactJSXElementValidator-test.internal.js

@@ -16,9 +16,6 @@ describe('ReactJSXElementValidator', () => {
   beforeEach(() => {
     jest.resetModules();
 
-    const ReactFeatureFlags = require('shared/ReactFeatureFlags');
-    ReactFeatureFlags.enableReactFragment = true;
-
     React = require('react');
     ReactTestUtils = require('react-dom/test-utils');
   });

packages/shared/ReactFeatureFlags.js

@@ -11,8 +11,6 @@ import invariant from 'fbjs/lib/invariant';
 
 export const enableAsyncSubtreeAPI = true;
 export const enableAsyncSchedulingByDefaultInReactDOM = false;
-// Exports React.Fragment
-export const enableReactFragment = false;
 // Exports ReactDOM.createRoot
 export const enableCreateRoot = false;
 export const enableUserTimingAPI = __DEV__;

scripts/rollup/shims/rollup/ReactFeatureFlags-www.js

@@ -18,7 +18,6 @@ export const {
 
 // The rest of the flags are static for better dead code elimination.
 export const enableAsyncSubtreeAPI = true;
-export const enableReactFragment = false;
 export const enableCreateRoot = true;
 
 // The www bundles only use the mutating reconciler.