This was flagged by a recent Lighthouse audit, and may affect Google Search due to being included by PageSpeed Insights and Search Console as of last year.

From https://web.dev/measure/ for https://en.wikipedia.org/wiki/Barrack_Obama

[aria-*] attributes do not have valid values
Assistive technologies, like screen readers, can't interpret ARIA attributes with invalid values.

Failing Elements

<nav class="minerva-user-navigation" aria-labelledby="minerva-user-menu-toggle"> <div><button id="searchIcon" class="mw-ui-icon mw-ui-icon-element mw-ui-icon-wikimedia-search-base20 skin-minerva-search-trigger" type="submit">Search</button></div> </nav>

I've confirmed against production page views that the navigation element indeed points to minerva-user-menu-toggle but there appears to be no id="minerva-user-menu-toggle" element in the HTML.

QA

• Visit https://en.m.wikipedia.beta.wmflabs.org/wiki/Barack%20Obama in Google Chrome
• Open developer tools and click audit tab
• Under audits make sure only accessibility is checked
• Click "run audits"
• In the report there should be no mention of "[aria-*] attributes do not have valid values". The score should be higher than or at least equal to 93. Please report here with the score.

QA Results