Dev: warn when slider controls missing an accessible name (help with …

[Pseudo-Sid26]

Title Dev: warn when slider controls are missing an accessible name (help with #33669)

Body Summary

Add a DEV-only console warning when a slider control (implicit via or any element with role="slider") is rendered without an obvious accessible name source (aria-label, aria-labelledby, or title). Motivation

Screen readers on Windows (Narrator / NVDA / JAWS) can announce unlabeled sliders ambiguously (e.g. “slider 3”), which is confusing for users. This diagnostic helps authors catch missing accessible names during development. What changed

ReactDOMComponent.js In validatePropertiesInDevelopment, warn when: type === 'input' && props.type === 'range' and no aria-label / aria-labelledby / title present. props.role === 'slider' and no aria-label / aria-labelledby / title present. Warning is conservative and props-based only to avoid false positives. packages/react-dom/src/tests/ReactDOMInvalidARIAHook-test.js Added a unit test asserting the new dev warning is emitted for an unlabeled . Testing / Validation

Install deps: npm install OR yarn Run the added test: npx jest packages/react-dom/src/tests/ReactDOMInvalidARIAHook-test.js -i --colors Manual smoke-check: Run an app in development, render without aria-* or title, and verify a single console.error appears instructing to add aria-label / aria-labelledby / title. Notes / Limitations

This is a developer-only diagnostic gated by DEV; it does not affect production bundles. The check uses props-only detection (aria-label / aria-labelledby / title). It does not attempt to walk the DOM to detect associated to avoid false positives at this location. Consider a follow-up DOM-level dev checker if maintainers want label association detection. Wording can be adjusted if maintainers prefer different guidance or links to docs. Issue

Helps resolve / relates to: #33669

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[react-sizebot]

Comparing: 546bac728125bed821c0205e3d7216a7c9a563cb...fd6d959a90b3fce3a259e110b2e54f80e571bbc9

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.js	=	6.68 kB	6.68 kB	=	1.83 kB	1.83 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	530.18 kB	530.18 kB	=	93.39 kB	93.39 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.69 kB	6.69 kB	=	1.83 kB	1.83 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	655.81 kB	655.81 kB	=	115.31 kB	115.30 kB
facebook-www/ReactDOM-prod.classic.js	=	675.58 kB	675.58 kB	=	118.54 kB	118.54 kB
facebook-www/ReactDOM-prod.modern.js	=	666.00 kB	666.00 kB	=	116.87 kB	116.87 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
test_utils/ReactAllWarnings.js	+0.52%	66.91 kB	67.25 kB	+0.69%	16.82 kB	16.94 kB

Generated by :no_entry_sign: dangerJS against fd6d959a90b3fce3a259e110b2e54f80e571bbc9

[github-actions[bot]]

This pull request has been automatically marked as stale. If this pull request is still relevant, please leave any comment (for example, "bump"), and we'll keep it open. We are sorry that we haven't been able to prioritize reviewing it yet. Your contribution is very much appreciated.