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fix(a11y): set aria-expanded on sidebar links that toggle a sub-sidebar - #2809
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sy-records merged 1 commit intoSep 28, 2026
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The active page link collapses and expands its sub-sidebar when it is activated, but it exposed no expanded state, so screen readers could not announce it. Set aria-expanded when the sub-sidebar is rendered and update it whenever the link toggles the sub-sidebar.
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September 27, 2026 06:12
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Summary
The active sidebar page link expands and collapses its sub-sidebar (the list of the page's headings) when it is activated, but it has no aria-expanded state, so it is exposed to assistive technology as a plain link with no expanded or collapsed state.
This sets aria-expanded="true" on the active link when its sub-sidebar is rendered, and updates the value whenever the link toggles the sub-sidebar, the same way the collapsible group titles already do. Links without a sub-sidebar (pages that are not active, or pages without headings) get no aria-expanded, since activating them only navigates.
Before/after, checked on the docs site served locally (node server --dev) on the Quick start page:
Verification:
Related issue, if any:
Closes #2615
What kind of change does this PR introduce?
For any code change,
Does this PR introduce a breaking change?
Tested in the following browsers: