TypedArray.prototype.slice
Returns a shallow copy of a portion of a typed array into a new typed array, with a new underlying ArrayBuffer
Syntax
typedArray.slice(begin?, end?)Parameters
| Parameter | Type | Description |
|---|---|---|
| begin | number | Index to start extraction |
| end | number | Index before which to end extraction |
Return Value
A new TypedArray containing the extracted elements
Examples
const arr = new Uint8Array([1, 2, 3, 4, 5])
const copy = arr.slice(1, 4)
console.log(copy) // Uint8Array [2, 3, 4]const arr = new Float64Array([1.1, 2.2, 3.3])
const last = arr.slice(-1)
console.log(last) // Float64Array [3.3]const original = new Int32Array([10, 20, 30])
const copy = original.slice()
copy[0] = 99
console.log(original[0]) // 10 (independent copy)Understanding TypedArray.prototype.slice
The TypedArray.prototype.slice method in JavaScript returns a shallow copy of a portion of a typed array into a new typed array, with a new underlying ArrayBuffer. It belongs to the TypedArray object and is one of the most widely used methods for working with typedarray values in modern JavaScript and TypeScript applications.
The method signature is typedArray.slice(begin?, end?). It accepts 2 parameters: begin, end. When called, it returns a new typedarray containing the extracted elements. Understanding when and how to use slice() helps you write more expressive, readable code.
Common use cases for TypedArray.prototype.slice include data transformation, input validation, API response processing, and building reusable utility functions. It works well alongside related methods like typedarray-subarray, typedarray-set, arraybuffer-slice, enabling you to chain operations together for complex data manipulation pipelines.
Browser support for TypedArray.prototype.slice is excellent across all modern browsers including Chrome, Firefox, Safari, and Edge. It is also fully supported in Node.js and Deno. For older environments, transpilation with Babel or a polyfill may be needed.
Browser Compatibility
Supported in all modern browsers (Chrome, Firefox, Safari, Edge) and Node.js. Part of the ECMAScript standard.
Related Methods
TypedArray.prototype.subarrayReturns a new typed array on the same ArrayBuffer store and with the same element types as this typed array, from begin up to but not including end
TypedArray.prototype.setStores multiple values in the typed array, reading input from a specified array or typed array
ArrayBuffer.prototype.sliceReturns a new ArrayBuffer whose contents are a copy of this ArrayBuffer's bytes from begin up to but not including end
More TypedArray Methods
Other methods in the TypedArray object
Related Tools
More TypedArray Methods
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