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Aria Valid Attr Value

Testing & Quality
aria-valid-attr-value

Aria Valid Attr Value is an Agent Skill for testing & quality published in the thedaviddias/Front-End-Checklist repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.

Use when reviewing rendered HTML, interactive components, or design-system patterns related to Use valid values for ARIA attributes. Check native semantics first, then inspect keyboard behavior, focus flow, accessible names, and screen-reader output where relevant.

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How to use this skill

Bring this guide into your coding agent with a prompt tailored to the tool you use.

  1. Open your project in Codex.
  2. Copy and paste the prompt below.
  3. Review files and risks before approving any action.
Prompt to paste
Inspect the Agent Skill at https://github.com/thedaviddias/Front-End-Checklist/blob/HEAD/skills/aria-valid-attr-value/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/aria-valid-attr-value, but wait for my approval before writing files or running scripts.

Copying this prompt does not install or run the skill. Review third-party files before use.

Use valid values for ARIA attributes

Invalid attribute values cause ARIA properties to be ignored or misinterpreted by assistive technologies, leading to a broken or confusing user experience.

Quick Reference

  • Ensure ARIA attribute values (like aria-expanded="true") are valid
  • Avoid using "yes/no" where "true/false" is required
  • Check that IDs referenced in aria-labelledby or aria-owns actually exist

Check

Validate that all ARIA attribute values conform to the allowed types (boolean, integer, ID list, etc.).

Fix

Correct any invalid ARIA attribute values to match the expected format defined in the ARIA specification.

Explain

Explain why precise attribute values are necessary for browsers to correctly communicate element states to assistive technology.

Code Review

Review the rendered markup and interactive states that affect Use valid values for ARIA attributes. Flag exact elements, roles, labels, focus behavior, or keyboard interactions that violate the rule, and note how to verify the fix with browser accessibility tooling or assistive tech.

For full implementation details, code examples, and framework-specific guidance, see references/rule.md.

Rule page: https://frontendchecklist.io/en/rules/accessibility/aria-valid-attr-value