custom-element-accessibility SKILL.md skillA
custom-element-accessibility from thedaviddias/front-end-checklist is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add thedaviddias/front-end-checklist/custom-element-accessibility@git:20261004.4b0ddb9Pins git:20261004.4b0ddb9 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- thedaviddias/front-end-checklist
- Path
skills/custom-element-accessibility/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261004.4b0ddb9, committed Oct 4, 2026
- First version recorded
- May 29, 2026
- Size
- 2,619 bytes
- Repository stars
- 74,516
- License
- MIT
Use when reviewing custom element class definitions or Web Component source code to check for missing ARIA reflection, keyboard handling, and form association.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Make custom elements and Web Components accessible 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. ## Quick Reference - Prefer native `<button>`, `<input>`, `<select>`, and `<details>` before building a custom widget - Use ElementInternals.ariaRole to expose ARIA semantics from the shadow DOM - Implement form-associated custom elements with ElementInternals for native form participation - Apply roving tabindex for compound widgets (listbox, toolbar, menu) - The shadow DOM does not automatically expose ARIA to the accessibility tree without ElementInternals ## Check Inspect 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. ## Fix …
Read the whole file at its exact version.
How to install
mdr add thedaviddias/front-end-checklist/custom-element-accessibility@sha256:e58fc2233d5181fcThe line at the top of this page pins the label git:20261004.4b0ddb9, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ca4msucu4no4u5kj)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between May 29, 2026 and Oct 4, 2026, about one every 128 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261004.4b0ddb9 latest | 2026-10-04 | 4b0ddb9 | 2,619 B | A | view · diff |
| git:20260529.7c05904 | 2026-05-29 | 7c05904 | 2,625 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2619 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
thedaviddias/front-end-checklist · 74,516 stars · license MIT · pushed 2026-10-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ca4msucu4no4u5kj GET https://markdownregistry.com/api/v1/resolve?ref=thedaviddias/front-end-checklist/custom-element-accessibility GET https://markdownregistry.com/api/v1/blob/e58fc2233d5181fc3dac691224147be8cb31791ea6195dc658f067835dbba054
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.