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 - https://www.chromestatus.com/feature/4570991992766464 handles all other platforms

Motivation

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

Documentation

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer
• https://docs.google.com/document/d/1tXfF0sdMQJPtwc2qEGF_V_z5xiCkP3ayS5ByRz6Rc-A/edit?ts=5f236efa

Specification

Specification link

Status: Final published standard: Recommendation, Living Standard, Candidate Recommendation, or similar final form

Status in Chromium

Blink components: Blink>JavaScript

Implementation status: Enabled by default (tracking bug)

Consensus & Standardization

• Firefox: Shipped/Shipping
• Safari: No signal
• Web Developers: Positive

Owners

• vahl@chromium.org
• binji@chromium.org
• bbudge@chromium.org

Intent to Prototype url

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Last updated on 2021-12-13