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SharedArrayBuffer.prototype.slice()

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

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Syntax

slice()
slice(start)
slice(start, end)

Parameters

start Optional

Zero-based index at which to start extraction, converted to an integer.

Negative index counts back from the end of the buffer — if start < 0, start + buffer.length is used.
If start < -buffer.length or start is omitted, 0 is used.
If start >= buffer.length, nothing is extracted.

end Optional

Zero-based index at which to end extraction, converted to an integer. slice() extracts up to but not including end.

Negative index counts back from the end of the buffer — if end < 0, end + buffer.length is used.
If end < -buffer.length, 0 is used.
If end >= buffer.length or end is omitted, buffer.length is used, causing all elements until the end to be extracted.
If end is positioned before or at start after normalization, nothing is extracted.

Return value

A new SharedArrayBuffer containing the extracted elements.

Examples

Using slice()

const 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	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	Deno	Node.js
`slice`	68	79	79	55	15.2	89	79	63	15.2	15.0	No	1.0	8.10.0