The overflow audit names the wrong culprits when a page scrolls sideways. measure() in site-src/audit/overflow-audit.js lists the first five elements whose box passes the viewport edge, including elements inside their own scrolling container (overflow-x auto, scroll or hidden), which cannot widen the page. On /record/ at 360 px it named the four sub-navigation links and the genealogy svg, both inside their own scroll containers, and never the Latest decisions title span that set scrollWidth 482, which sent the bisect after the timeline renderer. It also reports nothing when the overflow is a text run rather than an element box, as on a record page whose h1 holds a long unbroken path.

The overflow audit names the wrong culprits when a page scrolls sideways. measure() in site-src/audit/overflow-audit.js lists the first five elements whose box passes the viewport edge, including elements inside their own scrolling container (overflow-x auto, scroll or hidden), which cannot widen the page. On /record/ at 360 px it named the four sub-navigation links and the genealogy svg, both inside their own scroll containers, and never the Latest decisions title span that set scrollWidth 482, which sent the bisect after the timeline renderer. It also reports nothing when the overflow is a text run rather than an element box, as on a record page whose h1 holds a long unbroken path.

Grounds

• pursued: every culprit the audit names can widen the document; a failing run whose culprits include an element inside a scroll container, or a text-run overflow reported with no culprit, would show it wrong.