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Ship enableNativeEventTargetEventDispatching by default - #58450

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rubennorte wants to merge 3 commits into
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rubennorte:export-D119495069
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Ship enableNativeEventTargetEventDispatching by default#58450
rubennorte wants to merge 3 commits into
react:mainfrom
rubennorte:export-D119495069

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Summary:
The renderer can dispatch events either through the legacy plugin-based system or through the W3C EventTarget API (addEventListener/dispatchEvent), gated behind the enableNativeEventTargetEventDispatching feature flag. Enabling it by default was previously blocked on the renderer, which did not carry the necessary changes until React 19.3.0. That sync has now landed, so flip the flag's default value to true and drop the TODO that tracked the blocker.

Fully removing the flag and the legacy dispatch path is left for a follow-up.

Changelog:
[General][Changed] - Dispatch events through the EventTarget API by default

Differential Revision: D119495069

Summary:

Sync of React 19.3.0 into React Native

Changelog: [General][Changed] - Sync React 19.3.0 into React Native

jest_e2e[run_all_tests] bypass-github-export-checks

Differential Revision: D119490598
Summary:

Remove the isOSS conditionals that were skipping Fantom renderer tests in OSS environments. Now that the React Native renderers have been upgraded and the code is compatible in OSS, these tests can run in both internal and OSS environments.

Changes:
- ResponderEventTarget-itest.js: Removed isOSS check that skipped the entire Responder System test suite
- EventTargetDispatching-itest.js: Removed isOSS check that skipped the entire EventTarget-based Event Dispatching test suite
- EventDispatching-benchmark-itest.js: Removed if (isOSS) block that provided a dummy test instead of the benchmark suite
- EventDispatching-itest.js: Removed if (!isOSS) condition guarding three tests for native event timeStamp and global event dispatching

Changelog: [Internal]

Reviewed By: andrewdacenko

Differential Revision: D107675643
Summary:
The renderer can dispatch events either through the legacy plugin-based system or through the W3C EventTarget API (addEventListener/dispatchEvent), gated behind the enableNativeEventTargetEventDispatching feature flag. Enabling it by default was previously blocked on the renderer, which did not carry the necessary changes until React 19.3.0. That sync has now landed, so flip the flag's default value to true and drop the TODO that tracked the blocker.

Fully removing the flag and the legacy dispatch path is left for a follow-up.

Changelog:
[General][Changed] - Dispatch events through the EventTarget API by default

Differential Revision: D119495069
@meta-cla meta-cla Bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Sep 10, 2026
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meta-codesync Bot commented Sep 10, 2026

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@rubennorte has exported this pull request. If you are a Meta employee, you can view the originating Diff in D119495069.

rubennorte added a commit to rubennorte/react-native that referenced this pull request Sep 10, 2026
Summary:

The renderer can dispatch events either through the legacy plugin-based system or through the W3C EventTarget API (addEventListener/dispatchEvent), gated behind the enableNativeEventTargetEventDispatching feature flag. Enabling it by default was previously blocked on the renderer, which did not carry the necessary changes until React 19.3.0. That sync has now landed, so flip the flag's default value to true and drop the TODO that tracked the blocker.

Fully removing the flag and the legacy dispatch path is left for a follow-up.

Changelog:
[General][Changed] - Enabled Web-based event dispatching refactor

Differential Revision: D119495069
rubennorte added a commit to rubennorte/react-native that referenced this pull request Sep 10, 2026
Summary:

The renderer can dispatch events either through the legacy plugin-based system or through the W3C EventTarget API (addEventListener/dispatchEvent), gated behind the enableNativeEventTargetEventDispatching feature flag. Enabling it by default was previously blocked on the renderer, which did not carry the necessary changes until React 19.3.0. That sync has now landed, so flip the flag's default value to true and drop the TODO that tracked the blocker.

Fully removing the flag and the legacy dispatch path is left for a follow-up.

Changelog:
[General][Changed] - Enabled Web-based event dispatching refactor

Reviewed By: javache

Differential Revision: D119495069
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