Adds the JavaScript type SharedArrayBuffer to Android gated behind COOP/COEP. The concept of a SharedArrayBuffer is that a message to a worker, is posted but instead of copying the content of the array just a reference to it is shared, so that all have the same view on the shared chunk of data in the memory. This feature is only targeting Android - handles all other platforms


SABs are currently disabled in Chrome on Android. As COOP/COEP have been released we can use ‘self.crossOriginIsolated’ to re-enable SABs on Android in case the site is isolated



Specification link

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.


Intent to Prototype url

Intent to Prototype thread

Search tags

SABs, Wasm Threads,

Last updated on 2021-12-13