Allows properties to be added to existing objects without the possibility of interference with the existing properties, unintended visibility, or with other uncoordinated additions by any other code.
Documentation
Specification
Final published standard: Recommendation, Living Standard, Candidate Recommendation, or similar final form
Status in Chromium
Enabled by default
(tracking bug)
Consensus & Standardization
After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.
- Shipped/Shipping
- Shipped/Shipping
- Positive
Owner
Last updated on 2020-11-09