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HTMLAllCollection and HTMLCollection's named properties are no longer enumerable

Category

DOM

Type

New or changed feature

Status

Enabled by default (Chrome 63)

Intent stage

None

Summary

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.

Standards & signals

• Specification: https://dom.spec.whatwg.org/#htmlcollection
• Firefox: Shipped/Shipping
• Safari: Shipped/Shipping
• Web developers: No signals
• Tracking bug: https://bugs.chromium.org/p/chromium/issues/detail?id=703990

View on chromestatus.com