Review custom elements and Web Components for missing screen reader information, keyboard controls, focus handling, and HTML form integration. Get concrete fixes and identify cases where a native HTML control could serve the same purpose.
Use when reviewing custom element class definitions or Web Component source code to check for missing ARIA reflection, keyboard handling, and form association.
Review the instructions the agent will receive before you install.
Custom elements that lack ARIA reflection are invisible to screen readers — a button that looks correct visually may be announced as a generic "group" or not at all. ElementInternals provides the bridge between the shadow DOM and the accessibility tree, and it is also the only standards-compliant way to integrate custom inputs with native HTML forms.
<button>, <input>, <select>, and <details> before building a custom widgetInspect these custom element definitions for missing ElementInternals setup, absent ARIA reflection, incomplete keyboard interaction patterns, and lack of form association for input-like components. First verify that the widget truly needs to be custom rather than a native control with styling.
Add ElementInternals attachment in the constructor, implement ariaRole and ariaLabel reflection, add keyboard event handlers following ARIA authoring patterns, and use formAssociated for custom input elements. Replace the component with native HTML when the native control already supports the required interaction.
Explain why the shadow DOM does not automatically expose ARIA semantics and how ElementInternals bridges the gap between custom elements and the accessibility tree.
Review custom element class files for ElementInternals attachment, ARIA property reflection, keyboard interaction (Tab, Enter, Space, Arrow keys), focus management, and formAssociated static property on input-like elements. Flag cases where a native control would remove the accessibility burden entirely.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/rules/html/custom-element-accessibility
No reviews yet. Tell others what you thought.
No login needed. Share how it worked for you, ask a question, or note where it did not run.
No comments yet. Be the first to write one.
Create and review custom 404 pages that help visitors recover from broken or moved links through search and navigation. Check the rendered page and HTTP response so missing content returns a proper 404 status.
Audit or create a dedicated About page that explains a website’s purpose and identifies its people or organization. Review the rendered output and supporting information, including expertise and contact details, to find gaps.
Review and add automated accessibility checks for components, pages, and continuous integration workflows. Use axe-based tools to detect structural and attribute issues, while identifying checks that still need keyboard or screen reader testing.
Review sign-in, registration, multi-factor authentication, and account recovery for accessibility barriers. Find blocked paste, difficult code entry, and inaccessible backup methods, then suggest authentication paths that support password managers, autofill, or device approval.
Review form errors, success messages, and live updates so screen reader users receive important notifications. Check the HTML delivered to the browser, announcement settings, display duration, and dismissal controls, then identify specific elements that need changes.
Review HTML tables so screen reader users can understand how headers and data relate. Check header markup, table descriptions, and merged cells, then identify specific fixes and ways to verify them.