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TypedArray.prototype.slice() - JavaScript | MDN
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TypedArray.prototype.slice()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2016.
The slice() method of TypedArray instances returns a copy of a portion of a typed array into a new typed array object selected from start to end (end not included) where start and end represent the index of items in that typed array. The original typed array will not be modified. This method has the same algorithm as Array.prototype.slice().
Try it
const bytes = new Uint8Array([10, 20, 30, 40, 50]);
const byteSlice = bytes.slice(1, 3);
console.log(byteSlice);
// Expected output: Uint8Array [20, 30]
Syntax
js
slice()
slice(start)
slice(start, end)
Parameters
startOptional-
Zero-based index at which to start extraction, converted to an integer.
endOptional-
Zero-based index at which to end extraction, converted to an integer.
slice()extracts up to but not includingend.
Return value
A new typed array containing the extracted elements.
Description
See Array.prototype.slice() for more details. This method is not generic and can only be called on typed array instances.
Examples
Return a portion of an existing typed array
js
const bytes = new Uint8Array([1, 2, 3]);
bytes.slice(1); // Uint8Array [ 2, 3 ]
bytes.slice(2); // Uint8Array [ 3 ]
bytes.slice(-2); // Uint8Array [ 2, 3 ]
bytes.slice(0, 1); // Uint8Array [ 1 ]
Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-%typedarray%.prototype.slice |