fix: Ensure aria-hidden applies to shadow root#315
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Pull Request Overview
This PR ensures that when aria-hidden="true" is set on a <relative-time> element, the attribute also applies inside its shadow root, hiding the rendered text from assistive technologies.
- Added
'aria-hidden'to the element’sobservedAttributesso attribute changes are handled. - Introduced a private
#updateRenderRootContentmethod to wrap content in a hidden<span>whenaria-hidden="true". - Added new tests to verify shadow-root behavior and updated the example page with a toggle button.
Reviewed Changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.
| File | Description |
|---|---|
| test/relative-time.js | Added [aria-hidden] test suite to assert shadow-root behavior |
| src/relative-time-element.ts | Observes aria-hidden and updates rendering via #updateRenderRootContent |
| examples/index.html | Demo button toggling aria-hidden on <relative-time> |
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
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Relates to: https://github.com/github/pull-requests/issues/17192
Problem
When
aria-hidden="true"is set on an relative-time element, the attribute doesn't always persist into the shadow root. As a result, even whenaria-hiddenis applied, the text rendered in relative-time can end up composing the accessible name (instead of being hidden from the AT tree).Solution
This makes update to render the text content within
aria-hidden="true", whenaria-hidden="true"is set on the shadow root.Demo
Before (no sound):
Before.mp4
video description: I'm on the demo page with the developer console open. The markup shows
aria-hiddenbeing toggled between true and false relative-time upon pressing the button. I switch to the accessibility tree mode. I see the accessible name for the button remains:With aria-hidden on Dec 31, 1969despite toggling.After (no sound):
After.mp4
video description: I'm on the demo page with the developer console open. The markup shows
aria-hiddenbeing toggled between true and false relative-time upon pressing the button. I switch to the accessibility tree mode. I see the accessible name for the button toggle between:With aria-hidden on Dec 31, 1969andWith aria-hiddenas we'd expect.