Blink now follows the DOM and HTML specs and declares HTMLAllCollection, HTMLCollection, HTMLFormControlsCollection and HTMLOptionsCollection with the [LegacyUnenumerableNamedProperties] extended attribute. Its named properties are no longer marked as enumerable, being left out of calls to e.g. Object.keys() and for-in loops.
Status in Chromium
Enabled by default (tracking bug) in:
- Chrome for desktop release 63
- Chrome for Android release 63
Consensus & Standardization
Last updated on 2020-11-09