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Th Has Data Cells

Design
th-has-data-cells

Th Has Data Cells is an Agent Skill for design 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 Ensure table headers associate with data cells. 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/th-has-data-cells/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/th-has-data-cells, 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.

Ensure table headers associate with data cells

Orphaned headers without data cells can confuse users of assistive technology and indicate a broken table structure.

Quick Reference

  • Every <th> must be associated with one or more <td> cells
  • Avoid empty headers that don't describe any data
  • Remove unnecessary headers to reduce screen reader noise

Check

Verify that all <th> elements are correctly associated with data cells.

Fix

Remove empty headers or ensure they are correctly mapped to data cells.

Explain

Explain why every header must have associated data to maintain an accessible table structure.

Code Review

Review the rendered markup and interactive states that affect Ensure table headers associate with data cells. 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/th-has-data-cells