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fix(core): exempt text fragments and name the nesting container's role - #520
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Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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📝 WalkthroughWalkthroughThe PR excludes text-fragment URLs from missing-ID checks and adds applicable container roles to interactive-nesting diagnostics. It updates shared parsing logic, CLI and Vite integrations, documentation, tests, exports, and package changesets. ChangesAccessibility rule updates
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to The PR improves text-fragment handling and nesting diagnostics, but the current implementation can still misclassify combined fragments, regress the existing Possibly related PRs
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Actionable comments posted: 3
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Inline comments:
In `@packages/cli/src/providers/source/parse.ts`:
- Line 439: Update the fragment condition in the relevant parser to exclude both
text fragments and the existing top fragment by applying isTopFragment alongside
isTextFragment, preserving href="`#top`" as an exemption. Restore or retain the
isTopFragment import, and make the same change in the corresponding rendered
HTML parser.
In `@packages/core/src/a11y.ts`:
- Around line 134-136: Update isTextFragment in packages/core/src/a11y.ts at
lines 134-136 to split fragments at the first :~: and expose the element prefix
for validation rather than checking only startsWith(':~:'). In
packages/vite/src/providers/rendered/parse-html.ts at lines 123-127, decode and
validate only that prefix while ignoring the directive suffix. Add coverage in
packages/vite/test/parse-html.test.ts at lines 245-248 for `#section`:~:text=...
and ensure section remains in idRefs.
Apply the same fix in `@packages/vite/test/parse-html.test.ts` around lines 245 -
248.
In `@packages/core/src/component-parse.ts`:
- Around line 1159-1163: The containerRoleOf function currently reports the
first literal role token instead of the resolved role. Update it to pass
splitTokens(role) through resolveRole and return the resolved value, preserving
undefined when no role is present, and add a regression test for a fallback such
as role="future-role button" that verifies button is reported.
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📒 Files selected for processing (13)
.changeset/great-eagles-jam.mddocs/blume.translations.jsondocs/src/content/docs/ja/rules/a11y/no-missing-id-ref.mddocs/src/content/docs/rules/a11y/no-missing-id-ref.mdpackages/cli/src/providers/source/parse.tspackages/core/src/a11y.tspackages/core/src/component-parse.tspackages/core/src/component.tspackages/core/src/internal.tspackages/core/src/rules/a11y/interactive-nesting.tspackages/core/test/component-parse.test.tspackages/vite/src/providers/rendered/parse-html.tspackages/vite/test/parse-html.test.ts
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Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Two leftovers from the Phase B-4 review record (#511): Priority 2 row 20 and the Priority 3 message row that the docs sweep deliberately deferred, since it needs a new field on a fact type rather than prose.
A text fragment is not an id reference
href="#:~:text=hello%20world"is a shipped web-platform feature: everything after:~:instructs the user agent to find text, and names no element.a11y/no-missing-id-refread it as an id reference and reported it missing — and printed the percent-decoded form, so the message told the reader to look for#:~:text=hello world, a string that appears nowhere in their source.Exempt now in both modes, beside the existing
#topexemption, via one sharedisTextFragmenthelper so the CLI and the plugin cannot diverge. Verified against a scratch project:This narrows detection.
The nesting finding did not say which element it meant
<button> is nested inside interactive <div>is unactionable on a page with many divs — and it was the role that made that div a container.InteractiveNestingFactgains an optionalcontainerRole, set only when the role is what opened the container:<div role="button"><button><button> is nested inside interactive <div role="button"><div role="checkbox switch"><a href>… inside interactive <div role="checkbox">— the resolved role, not the first token<a href><button><button> is nested inside interactive <a>— unchanged, the tag is the reasonVerification
pnpm build,pnpm typecheck,pnpm test(core 1539 / cli 1213 / vite 253 / kitchen-sink 16 — no expectation moved),pnpm lint,translate:checkclean. Three regression tests: the role-carrying fact, the tag-only fact, and the rendered-mode text fragment.Still open from the review
The two severity questions are maintainer calls and stay open: whether
a11y/require-datetimeshould beinfo(its basis is HTML conformance, not a WCAG criterion) and whethera11y/doctypeshould be (its evidence is the weakest of the fifteen, and project scope makes it the most expensive single a11y finding). Two smaller Priority 2 items also remain: accepting the literalundefinedforaria-*boolean/tristate values, where the spec and Svelte's own compiler disagree, and uppercase ARIA attribute names being invisible to the collector.🤖 Generated with Claude Code
Summary by CodeRabbit
Bug Fixes
Documentation
Tests