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ArrayBuffer.prototype.slice()

The slice() method of ArrayBuffer instances returns a new ArrayBuffer whose contents are a copy of this ArrayBuffer'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.

Try it

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 ArrayBuffer containing the extracted elements.

Examples

Copying an ArrayBuffer

const buf1 = new ArrayBuffer(8);
const buf2 = buf1.slice(0);

Specifications

Specification
ECMAScript Language Specification # sec-arraybuffer.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`	17	12	12 The non-standard `ArrayBuffer.slice()` method has been removed in Firefox 53 (but the standardized version `ArrayBuffer.prototype.slice()` is kept.	12.1	5.1	18	14 The non-standard `ArrayBuffer.slice()` method has been removed in Firefox 53 (but the standardized version `ArrayBuffer.prototype.slice()` is kept.	12.1	6	1.0	4.4	1.0	0.12.0