SharedArrayBuffer.prototype.slice()

The SharedArrayBuffer.prototype.slice() method returns a new SharedArrayBuffer whose contents are a copy of this SharedArrayBuffer's bytes from begin, inclusive, up to end, exclusive. If either begin or end is negative, it refers to an index from the end of the array, as opposed to from the beginning. This method has the same algorithm as Array.prototype.slice().

Try it

Syntax

slice()
slice(begin)
slice(begin, end)

Parameters

begin Optional

Zero-based index at which to begin extraction.

A negative index can be used, indicating an offset from the end of the sequence. slice(-2) extracts the last two elements in the sequence.

If begin is undefined, slice begins from index 0.

end Optional

Zero-based index before which to end extraction. slice extracts up to but not including end.

For example, slice(1,4) extracts the second element through the fourth element (elements indexed 1, 2, and 3).

A negative index can be used, indicating an offset from the end of the sequence. slice(2,-1) extracts the third element through the second-to-last element in the sequence.

If end is omitted, slice extracts through the end of the sequence (sab.byteLength).

Return value

A new SharedArrayBuffer containing the extracted elements.

Examples

Using slice()

var sab = new SharedArrayBuffer(1024);
sab.slice();    // SharedArrayBuffer { byteLength: 1024 }
sab.slice(2);   // SharedArrayBuffer { byteLength: 1022 }
sab.slice(-2);  // SharedArrayBuffer { byteLength: 2 }
sab.slice(0, 1); // SharedArrayBuffer { byteLength: 1 }

Specifications

Specification
ECMAScript Language Specification # sec-sharedarraybuffer.prototype.slice

Browser compatibility

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	Deno	Node.js
`slice`	68 60-63 Chrome disabled SharedArrayBuffer on January 5, 2018 to help reduce the efficacy of speculative side-channel attacks. This was a temporary removal while mitigations were put in place.	79 16-17 Support was removed to mitigate speculative execution side-channel attacks (Windows blog).	79 57 Support was disabled by default to mitigate speculative execution side-channel attacks (Mozilla Security Blog). 55-57 46-55	No	No	15.2 `SharedArrayBuffer` is gated behind COOP/COEP. For more detail, read Making your website "cross-origin isolated" using COOP and COEP. 10.1-11	60-63 Chrome disabled SharedArrayBuffer on January 5, 2018 to help reduce the efficacy of speculative side-channel attacks. This is intended as a temporary measure until other mitigations are in place.	89 `SharedArrayBuffer` is gated behind COOP/COEP. For more detail, read Making your website "cross-origin isolated" using COOP and COEP. 60-63 Chrome disabled SharedArrayBuffer on January 5, 2018 to help reduce the efficacy of speculative side-channel attacks. This is intended as a temporary measure until other mitigations are in place.	79 57 Support was disabled by default to mitigate speculative execution side-channel attacks (Mozilla Security Blog). 55-57 46-55	No	15.2 `SharedArrayBuffer` is gated behind COOP/COEP. For more detail, read Making your website "cross-origin isolated" using COOP and COEP. 10.3-11	15.0 `SharedArrayBuffer` is gated behind COOP/COEP. For more detail, read Making your website "cross-origin isolated" using COOP and COEP.	1.0	8.10.0

Name	JavaScript
Version
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Last Updated	2022-04-28T06:04:39Z