Fix ScrollSpy smooth scroll from nested link content#42673
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Description
Fixes ScrollSpy smooth scrolling when a click originates from an element nested inside an anchor.
Motivation & Context
The delegated click handler read
hashfrom the native event target. Nested elements do not have the anchor hash, so the section lookup failed and smooth scrolling was skipped. The handler now uses Bootstrap's selector-matched delegated target, and a regression test covers a nested span.Type of changes
Checklist
npm run lint)