facebook · rickhanlonii · Feb 25, 2026
diff --git a/packages/react-dom-bindings/src/client/DOMPropertyOperations.js b/packages/react-dom-bindings/src/client/DOMPropertyOperations.js
@@ -8,7 +8,6 @@
  */
 
 import isAttributeNameSafe from '../shared/isAttributeNameSafe';
-import {enableTrustedTypesIntegration} from 'shared/ReactFeatureFlags';
 import {checkAttributeStringCoercion} from 'shared/CheckStringCoercion';
 import {getFiberCurrentPropsFromNode} from './ReactDOMComponentTree';
 import {trackHostMutation} from 'react-reconciler/src/ReactFiberMutationTracking';
@@ -124,10 +123,7 @@ export function setValueForAttribute(
     if (__DEV__) {
       checkAttributeStringCoercion(value, name);
     }
-    node.setAttribute(
-      name,
-      enableTrustedTypesIntegration ? (value: any) : '' + (value: any),
-    );
+    node.setAttribute(name, (value: any));
   }
 }
 
@@ -152,10 +148,7 @@ export function setValueForKnownAttribute(
   if (__DEV__) {
     checkAttributeStringCoercion(value, name);
   }
-  node.setAttribute(
-    name,
-    enableTrustedTypesIntegration ? (value: any) : '' + (value: any),
-  );
+  node.setAttribute(name, (value: any));
 }
 
 export function setValueForNamespacedAttribute(
@@ -180,11 +173,7 @@ export function setValueForNamespacedAttribute(
   if (__DEV__) {
     checkAttributeStringCoercion(value, name);
   }
-  node.setAttributeNS(
-    namespace,
-    name,
-    enableTrustedTypesIntegration ? (value: any) : '' + (value: any),
-  );
+  node.setAttributeNS(namespace, name, (value: any));
 }
 
 export function setValueForPropertyOnCustomComponent(

diff --git a/packages/react-dom-bindings/src/client/ReactDOMComponent.js b/packages/react-dom-bindings/src/client/ReactDOMComponent.js
@@ -71,7 +71,6 @@ import {
   enableHydrationChangeEvent,
   enableScrollEndPolyfill,
   enableSrcObject,
-  enableTrustedTypesIntegration,
   enableViewTransition,
 } from 'shared/ReactFeatureFlags';
 import {
@@ -525,9 +524,7 @@ function setProp(
       if (__DEV__) {
         checkAttributeStringCoercion(value, key);
       }
-      const sanitizedValue = (sanitizeURL(
-        enableTrustedTypesIntegration ? value : '' + (value: any),
-      ): any);
+      const sanitizedValue = (sanitizeURL(value): any);
       domElement.setAttribute(key, sanitizedValue);
       break;
     }
@@ -596,9 +593,7 @@ function setProp(
       if (__DEV__) {
         checkAttributeStringCoercion(value, key);
       }
-      const sanitizedValue = (sanitizeURL(
-        enableTrustedTypesIntegration ? value : '' + (value: any),
-      ): any);
+      const sanitizedValue = (sanitizeURL(value): any);
       domElement.setAttribute(key, sanitizedValue);
       break;
     }
@@ -699,9 +694,7 @@ function setProp(
       if (__DEV__) {
         checkAttributeStringCoercion(value, key);
       }
-      const sanitizedValue = (sanitizeURL(
-        enableTrustedTypesIntegration ? value : '' + (value: any),
-      ): any);
+      const sanitizedValue = (sanitizeURL(value): any);
       domElement.setAttributeNS(xlinkNamespace, 'xlink:href', sanitizedValue);
       break;
     }
@@ -727,10 +720,7 @@ function setProp(
         if (__DEV__) {
           checkAttributeStringCoercion(value, key);
         }
-        domElement.setAttribute(
-          key,
-          enableTrustedTypesIntegration ? (value: any) : '' + (value: any),
-        );
+        domElement.setAttribute(key, (value: any));
       } else {
         domElement.removeAttribute(key);
       }

diff --git a/packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js b/packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js
@@ -116,7 +116,6 @@ import {
 import {
   enableCreateEventHandleAPI,
   enableScopeAPI,
-  enableTrustedTypesIntegration,
   disableLegacyMode,
   enableMoveBefore,
   disableCommentsAsDOMContainers,
@@ -526,7 +525,7 @@ export function createInstance(
           // set to true and it does not execute
           const div = ownerDocument.createElement('div');
           if (__DEV__) {
-            if (enableTrustedTypesIntegration && !didWarnScriptTags) {
+            if (!didWarnScriptTags) {
               console.error(
                 'Encountered a script tag while rendering React component. ' +
                   'Scripts inside React components are never executed when rendering ' +

diff --git a/packages/react-dom-bindings/src/events/plugins/FormActionEventPlugin.js b/packages/react-dom-bindings/src/events/plugins/FormActionEventPlugin.js
@@ -14,7 +14,6 @@ import type {EventSystemFlags} from '../EventSystemFlags';
 import type {Fiber} from 'react-reconciler/src/ReactInternalTypes';
 import type {FormStatus} from 'react-dom-bindings/src/shared/ReactDOMFormActions';
 
-import {enableTrustedTypesIntegration} from 'shared/ReactFeatureFlags';
 import {getFiberCurrentPropsFromNode} from '../../client/ReactDOMComponentTree';
 import {startHostTransition} from 'react-reconciler/src/ReactFiberReconciler';
 import {didCurrentEventScheduleTransition} from 'react-reconciler/src/ReactFiberRootScheduler';
@@ -39,9 +38,7 @@ function coerceFormActionProp(
     if (__DEV__) {
       checkAttributeStringCoercion(actionProp, 'action');
     }
-    return (sanitizeURL(
-      enableTrustedTypesIntegration ? actionProp : '' + (actionProp: any),
-    ): any);
+    return (sanitizeURL(actionProp): any);
   }
 }
 

diff --git a/packages/react-dom/src/__tests__/ReactDOMFloat-test.js b/packages/react-dom/src/__tests__/ReactDOMFloat-test.js
@@ -602,14 +602,10 @@ describe('ReactDOMFloat', () => {
         '>   <script href="foo">\n' +
         '\n' +
         '    in script (at **)',
-      ...(gate('enableTrustedTypesIntegration')
-        ? [
-            'Encountered a script tag while rendering React component. ' +
-              'Scripts inside React components are never executed when rendering on the client. ' +
-              'Consider using template tag instead (https://developer.mozilla.org/en-US/docs/Web/HTML/Element/template).\n' +
-              '     in script (at **)',
-          ]
-        : []),
+      'Encountered a script tag while rendering React component. ' +
+        'Scripts inside React components are never executed when rendering on the client. ' +
+        'Consider using template tag instead (https://developer.mozilla.org/en-US/docs/Web/HTML/Element/template).\n' +
+        '     in script (at **)',
     ]);
 
     root.render(
@@ -2753,14 +2749,10 @@ body {
         '>   <script itemProp="foo">\n' +
         '\n' +
         '    in script (at **)',
-      ...(gate('enableTrustedTypesIntegration')
-        ? [
-            'Encountered a script tag while rendering React component. ' +
-              'Scripts inside React components are never executed when rendering on the client. ' +
-              'Consider using template tag instead (https://developer.mozilla.org/en-US/docs/Web/HTML/Element/template).\n' +
-              '     in script (at **)',
-          ]
-        : []),
+      'Encountered a script tag while rendering React component. ' +
+        'Scripts inside React components are never executed when rendering on the client. ' +
+        'Consider using template tag instead (https://developer.mozilla.org/en-US/docs/Web/HTML/Element/template).\n' +
+        '     in script (at **)',
     ]);
   });
 

diff --git a/packages/react-dom/src/__tests__/ReactDOMForm-test.js b/packages/react-dom/src/__tests__/ReactDOMForm-test.js
@@ -2338,11 +2338,7 @@ describe('ReactDOMForm', () => {
 
     await act(() => root.render(<Form action={instance} />));
     await submit(formRef.current);
-    assertLog(
-      gate('enableTrustedTypesIntegration')
-        ? [instance]
-        : ['stringified action'],
-    );
+    assertLog([instance]);
   });
 
   it('form actions should retain status when nested state changes', async () => {

diff --git a/packages/react-dom/src/__tests__/ReactDOMServerIntegrationUntrustedURL-test.js b/packages/react-dom/src/__tests__/ReactDOMServerIntegrationUntrustedURL-test.js
@@ -212,7 +212,7 @@ describe('ReactDOMServerIntegration - Untrusted URLs', () => {
       expectedToStringCalls *= 2;
     }
 
-    if (gate('enableTrustedTypesIntegration') && render === clientCleanRender) {
+    if (render === clientCleanRender) {
       // Trusted types does another toString.
       expectedToStringCalls += 1;
     }

diff --git a/packages/react-dom/src/__tests__/ReactEmptyComponent-test.js b/packages/react-dom/src/__tests__/ReactEmptyComponent-test.js
@@ -178,15 +178,13 @@ describe('ReactEmptyComponent', () => {
       }).not.toThrow();
 
       expect(container.innerHTML).toBe('<script></script>');
-      if (gate('enableTrustedTypesIntegration')) {
-        assertConsoleErrorDev([
-          'Encountered a script tag while rendering React component. ' +
-            'Scripts inside React components are never executed when rendering on the client. ' +
-            'Consider using template tag instead (https://developer.mozilla.org/en-US/docs/Web/HTML/Element/template).\n' +
-            '     in script (at **)\n' +
-            '     in TogglingComponent (at **)',
-        ]);
-      }
+      assertConsoleErrorDev([
+        'Encountered a script tag while rendering React component. ' +
+          'Scripts inside React components are never executed when rendering on the client. ' +
+          'Consider using template tag instead (https://developer.mozilla.org/en-US/docs/Web/HTML/Element/template).\n' +
+          '     in script (at **)\n' +
+          '     in TogglingComponent (at **)',
+      ]);
 
       const container2 = document.createElement('div');
       const root2 = ReactDOMClient.createRoot(container2);

diff --git a/packages/react-dom/src/client/__tests__/trustedTypes-test.internal.js b/packages/react-dom/src/client/__tests__/trustedTypes-test.internal.js
@@ -115,11 +115,7 @@ describe('when Trusted Types are available in global object', () => {
       expect(setAttributeCalls[0][0]).toBe(container.firstChild);
       expect(setAttributeCalls[0][1]).toBe('data-foo');
       // Ensure it didn't get stringified when passed to a DOM sink:
-      if (gate('enableTrustedTypesIntegration')) {
-        expect(setAttributeCalls[0][2]).toBe(ttObject1);
-      } else {
-        expect(setAttributeCalls[0][2]).toBe('<b>Hi</b>');
-      }
+      expect(setAttributeCalls[0][2]).toBe(ttObject1);
 
       setAttributeCalls.length = 0;
       await act(() => {
@@ -130,11 +126,7 @@ describe('when Trusted Types are available in global object', () => {
       expect(setAttributeCalls[0][0]).toBe(container.firstChild);
       expect(setAttributeCalls[0][1]).toBe('data-foo');
       // Ensure it didn't get stringified when passed to a DOM sink:
-      if (gate('enableTrustedTypesIntegration')) {
-        expect(setAttributeCalls[0][2]).toBe(ttObject2);
-      } else {
-        expect(setAttributeCalls[0][2]).toBe('<b>Bye</b>');
-      }
+      expect(setAttributeCalls[0][2]).toBe(ttObject2);
     } finally {
       Element.prototype.setAttribute = setAttribute;
     }
@@ -158,11 +150,7 @@ describe('when Trusted Types are available in global object', () => {
       expect(setAttributeCalls[0][0]).toBe(container.firstChild);
       expect(setAttributeCalls[0][1]).toBe('class');
       // Ensure it didn't get stringified when passed to a DOM sink:
-      if (gate('enableTrustedTypesIntegration')) {
-        expect(setAttributeCalls[0][2]).toBe(ttObject1);
-      } else {
-        expect(setAttributeCalls[0][2]).toBe('<b>Hi</b>');
-      }
+      expect(setAttributeCalls[0][2]).toBe(ttObject1);
 
       setAttributeCalls.length = 0;
       await act(() => {
@@ -173,11 +161,7 @@ describe('when Trusted Types are available in global object', () => {
       expect(setAttributeCalls[0][0]).toBe(container.firstChild);
       expect(setAttributeCalls[0][1]).toBe('class');
       // Ensure it didn't get stringified when passed to a DOM sink:
-      if (gate('enableTrustedTypesIntegration')) {
-        expect(setAttributeCalls[0][2]).toBe(ttObject2);
-      } else {
-        expect(setAttributeCalls[0][2]).toBe('<b>Bye</b>');
-      }
+      expect(setAttributeCalls[0][2]).toBe(ttObject2);
     } finally {
       Element.prototype.setAttribute = setAttribute;
     }
@@ -202,11 +186,7 @@ describe('when Trusted Types are available in global object', () => {
       expect(setAttributeNSCalls[0][1]).toBe('http://www.w3.org/1999/xlink');
       expect(setAttributeNSCalls[0][2]).toBe('xlink:href');
       // Ensure it didn't get stringified when passed to a DOM sink:
-      if (gate('enableTrustedTypesIntegration')) {
-        expect(setAttributeNSCalls[0][3]).toBe(ttObject1);
-      } else {
-        expect(setAttributeNSCalls[0][3]).toBe('<b>Hi</b>');
-      }
+      expect(setAttributeNSCalls[0][3]).toBe(ttObject1);
 
       setAttributeNSCalls.length = 0;
       await act(() => {
@@ -218,11 +198,7 @@ describe('when Trusted Types are available in global object', () => {
       expect(setAttributeNSCalls[0][1]).toBe('http://www.w3.org/1999/xlink');
       expect(setAttributeNSCalls[0][2]).toBe('xlink:href');
       // Ensure it didn't get stringified when passed to a DOM sink:
-      if (gate('enableTrustedTypesIntegration')) {
-        expect(setAttributeNSCalls[0][3]).toBe(ttObject2);
-      } else {
-        expect(setAttributeNSCalls[0][3]).toBe('<b>Bye</b>');
-      }
+      expect(setAttributeNSCalls[0][3]).toBe(ttObject2);
     } finally {
       Element.prototype.setAttributeNS = setAttributeNS;
     }
@@ -233,15 +209,13 @@ describe('when Trusted Types are available in global object', () => {
     await act(() => {
       root.render(<script>alert("I am not executed")</script>);
     });
-    if (gate('enableTrustedTypesIntegration')) {
-      assertConsoleErrorDev([
-        'Encountered a script tag while rendering React component. ' +
-          'Scripts inside React components are never executed when rendering ' +
-          'on the client. Consider using template tag instead ' +
-          '(https://developer.mozilla.org/en-US/docs/Web/HTML/Element/template).\n' +
-          '    in script (at **)',
-      ]);
-    }
+    assertConsoleErrorDev([
+      'Encountered a script tag while rendering React component. ' +
+        'Scripts inside React components are never executed when rendering ' +
+        'on the client. Consider using template tag instead ' +
+        '(https://developer.mozilla.org/en-US/docs/Web/HTML/Element/template).\n' +
+        '    in script (at **)',
+    ]);
 
     // check that the warning is printed only once
     await act(() => {

diff --git a/packages/shared/ReactFeatureFlags.js b/packages/shared/ReactFeatureFlags.js
@@ -203,8 +203,6 @@ export const disableLegacyMode: boolean = true;
 // in open source, but www codebase still relies on it. Need to remove.
 export const disableCommentsAsDOMContainers: boolean = true;
 
-export const enableTrustedTypesIntegration: boolean = true;
-
 // Prevent the value and checked attributes from syncing with their related
 // DOM properties
 export const disableInputAttributeSyncing: boolean = false;

diff --git a/packages/shared/forks/ReactFeatureFlags.native-fb.js b/packages/shared/forks/ReactFeatureFlags.native-fb.js
@@ -61,7 +61,6 @@ export const enableSuspenseAvoidThisFallback: boolean = false;
 export const enableSuspenseCallback: boolean = true;
 export const enableTaint: boolean = true;
 export const enableTransitionTracing: boolean = false;
-export const enableTrustedTypesIntegration: boolean = true;
 export const enableUpdaterTracking: boolean = __PROFILE__;
 export const retryLaneExpirationMs = 5000;
 export const syncLaneExpirationMs = 250;

diff --git a/packages/shared/forks/ReactFeatureFlags.native-oss.js b/packages/shared/forks/ReactFeatureFlags.native-oss.js
@@ -49,7 +49,6 @@ export const enableSuspenseAvoidThisFallback: boolean = false;
 export const enableSuspenseCallback: boolean = false;
 export const enableTaint: boolean = true;
 export const enableTransitionTracing: boolean = false;
-export const enableTrustedTypesIntegration: boolean = true;
 export const passChildrenWhenCloningPersistedNodes: boolean = false;
 export const retryLaneExpirationMs = 5000;
 export const syncLaneExpirationMs = 250;

diff --git a/packages/shared/forks/ReactFeatureFlags.test-renderer.js b/packages/shared/forks/ReactFeatureFlags.test-renderer.js
@@ -26,7 +26,6 @@ export const disableInputAttributeSyncing: boolean = false;
 export const enableScopeAPI: boolean = false;
 export const enableCreateEventHandleAPI: boolean = false;
 export const enableSuspenseCallback: boolean = false;
-export const enableTrustedTypesIntegration: boolean = true;
 export const disableTextareaChildren: boolean = false;
 export const enableSuspenseAvoidThisFallback: boolean = false;
 export const enableCPUSuspense: boolean = false;

diff --git a/packages/shared/forks/ReactFeatureFlags.test-renderer.native-fb.js b/packages/shared/forks/ReactFeatureFlags.test-renderer.native-fb.js
@@ -46,7 +46,6 @@ export const enableSuspenseAvoidThisFallback = false;
 export const enableSuspenseCallback = false;
 export const enableTaint = true;
 export const enableTransitionTracing = false;
-export const enableTrustedTypesIntegration = true;
 export const enableUpdaterTracking = false;
 export const passChildrenWhenCloningPersistedNodes = false;
 export const retryLaneExpirationMs = 5000;

diff --git a/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js b/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js
@@ -28,7 +28,6 @@ export const enableCreateEventHandleAPI: boolean = false;
 export const enableSuspenseCallback: boolean = true;
 export const disableLegacyContext: boolean = false;
 export const disableLegacyContextForFunctionComponents: boolean = false;
-export const enableTrustedTypesIntegration: boolean = true;
 export const disableTextareaChildren: boolean = false;
 export const enableSuspenseAvoidThisFallback: boolean = true;
 export const enableCPUSuspense: boolean = false;

diff --git a/packages/shared/forks/ReactFeatureFlags.www.js b/packages/shared/forks/ReactFeatureFlags.www.js
@@ -43,7 +43,6 @@ export const enableProfilerTimer = __PROFILE__;
 export const enableProfilerCommitHooks = __PROFILE__;
 export const enableProfilerNestedUpdatePhase = __PROFILE__;
 export const enableUpdaterTracking = __PROFILE__;
-export const enableTrustedTypesIntegration: boolean = true;
 export const enableSuspenseAvoidThisFallback: boolean = true;
 
 export const enableAsyncDebugInfo: boolean = true;