[joshblack]

Follow up to #8564.

This PR enables React Compiler for ActionMenu. We replace the captured renderAnchor reassignment with a local object accumulator, preserving the existing child traversal, tooltip handling, and merged anchor handlers.

Public APIs stay unchanged.

Changelog

New

Changed

• Enable React Compiler for ActionMenu.

Removed

Rollout strategy

Selected minor for the compiler rollout, consistent with the earlier entries in this stack. No consumer migration is needed.

• No changes needed in github/github-ui
• Needs changes in github/github-ui
• Ships with feature flag(s)
• Not sure
• None

[changeset-bot]

🦋 Changeset detected

Latest commit: e6b3ab8

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@primer/react	Minor

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

⚠️ Action required

👋 Hi, this pull request contains changes to the source code that github/github-ui depends on. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Check the integration testing docs for step-by-step instructions. Or, apply the integration-tests: skipped manually label to skip these checks.

[Copilot]

🟢 Approval recommended

Static review identified no blocking issues in the behavior-preserving refactor; runtime and compiler checks were not executed.

No open issues 🎉

What changed in this PR

Continues the React Compiler rollout after #8564 by enabling it for ActionMenu, without changing public APIs.

Changes:

• Replaces captured anchor reassignment with a local object accumulator.
• Removes ActionMenu from compiler exclusions.
• Adds a minor-release changeset.

File	Description
packages/​react/​src/​ActionMenu/​ActionMenu.tsx	Refactors anchor handling for compiler compatibility.
packages/​react/​script/​react-compiler.mjs	Enables compilation of ActionMenu.
.changeset/​react-compiler-action-menu.md	Records the rendering-performance improvement.

_{Review effort: Balanced}

[primer-integration]

Integration test results from github/github-ui PR:

  Changes Passed
  CI Passed
  VRT Passed
  Projects Passed

All checks passed!

[github-actions]

⚠️ Action required

👋 Hi, there are new commits since the last successful integration test. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Check the integration testing docs for step-by-step instructions. Or, apply the integration-tests: skipped manually label to skip these checks.