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conformance · v133

v133 · fix-text-selection-on-shadow-dom-with-delegatesfocus — conformance probe

5 assertions drawn from the spec. Each is a single contract the spec text makes. Pass/fail reflects what this browser executed; blocked means the contract was not run because it needs user mediation, hardware, or another unavailable precondition. Open the page in Chrome stable / canary / Firefox / Safari to compare.

browser: spec: https://dom.spec.whatwg.org/#shadowroot-delegates-focus chromestatus: #5134341540413440 generated 2026-06-01T08:12:59Z by conformance-author-v1-subagent
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fail
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blocked
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id contract kind verdict detail
shadowroot-delegatesfocus-attr ShadowRoot.prototype exposes the delegatesFocus attribute. spec ↗ script
attachshadow-delegatesfocus-true attachShadow({ delegatesFocus: true }) produces a ShadowRoot whose delegatesFocus is true. script
delegatesfocus-default-false Without delegatesFocus in the init dict, ShadowRoot.delegatesFocus is false. script
selection-api-still-works-on-host document.getSelection() still returns a Selection object on documents that contain shadow trees with delegatesFocus. script
shadowroot-getselection-exposed ShadowRoot.prototype exposes getSelection() (Chromium-specific) for retrieving selection within the shadow tree. script