[francinelucca]

Closes #7879

Graduate primer_react_button_loading_disabled_styles: loading buttons now use disabled styling by default while retaining their existing aria-disabled semantics, focusability, and loading announcements. This preserves the primary variant without requiring native disabled or inactive.

Changelog

New

• Regression coverage for disabled loading styles across all five button variants and restoring enabled styles when loading finishes.

Changed

• Apply the existing disabled loading styles without a feature flag.
• Document the default loading appearance and include an @primer/react patch changeset.

Removed

• primer_react_button_loading_disabled_styles registration, hook usage, and temporary styling attribute.

Rollout strategy

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

Ship the previously flagged styling as the default in the next patch release. No consumer API migration is required.

Testing & Reviewing

• npm run build — passed.
• npm test -- --run --project '@primer/react' packages/react/src/Button/__tests__/Button.test.tsx — passed, 63 tests.
• npm test -- --run — passed, 3,094 tests; 3 skipped and 10 todo.
• npm run type-check — passed.
• npm run lint and npm run lint:css — passed.
• npm run format, npm run lint:fix, and npm run format:diff — passed.
• STORYBOOK_URL=http://localhost:6008 npx playwright test e2e/components/Axe.test.ts --grep 'components-(button|iconbutton|linkbutton)-features--loading( |-|$)' --workers=2 — passed, 108 accessibility checks across nine themes. Used the running Storybook index for accessibility test discovery.
• STORYBOOK_URL=http://localhost:6008 npx playwright test e2e/components/Button.test.ts --grep 'Loading.*@vrt' --workers=2 — could not compare: all 36 checks lack macOS baselines. Generated macOS snapshots were removed; canonical Linux baselines should be regenerated with the update snapshots label.

Visually inspected the existing Loading story: loading primary buttons retain the primary disabled appearance and remain focusable without native disabled.

[changeset-bot]

🦋 Changeset detected

Latest commit: 98f955c

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	Patch

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[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.