ArrayBuffer.prototype.transfer

Category: JavaScript
Type: Chromium catches up
Status: Enabled by default (Chrome 114)
Intent stage: Prepare to ship

Breaking change: No
Enterprise impact: None
Chromium flag: --harmony-rab-gsab-transfer
Spec maturity: Working draft
Web Platform Tests: Yes

WPT details: In test262. -https://github.com/tc39/test262/tree/ff405fd0df81ff52c3bcb5b2be3e872983fb0402/test/built-ins/ArrayBuffer/prototype/transfer - https://github.com/tc39/test262/tree/ff405fd0df81ff52c3bcb5b2be3e872983fb0402/test/built-ins/ArrayBuffer/prototype/transferToFixedLength - https://github.com/tc39/test262/tree/ff405fd0df81ff52c3bcb5b2be3e872983fb0402/test/built-ins/ArrayBuffer/prototype/detached

Summary

Adds the ArrayBuffer.prototype.transfer method, which copies the receiver buffer, detaches the receiver, then returns the copy. This adds a JS API for what is possible via structured cloning. Also adds ArrayBuffer.prototype.transferToFixedLength and the ArrayBuffer.prototype.detached getter. This is a TC39 proposal.

Standards & signals

Specification: https://tc39.es/proposal-arraybuffer-transfer
Firefox: Positive — This is a Stage 3 TC39 proposal.
Safari: Positive — This is a Stage 3 TC39 proposal.
Web developers: No signals

Ecosystem

Web Platform Tests: https://wpt.fyi/results/?q=test%2Fbuilt-ins%2FArrayBuffer%2Fprototype%2Ftransfer
Chrome Platform Showcase: https://chrome-platform-showcase.paulkinlan-ea.deno.net/features
GenDN reference: https://gendn.paulkinlan-ea.deno.net/features
chrome.dev demos search: https://www.google.com/search?q=site%3Achrome.dev+ArrayBuffer.prototype.transfer
MDN Web Docs: https://developer.mozilla.org/en-US/search?q=ArrayBuffer.prototype.transfer
Baseline status: https://webstatus.dev/?q=ArrayBuffer.prototype.transfer

Docs: https://github.com/tc39/proposal-arraybuffer-transfer

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