| [ Web Proxy ] |
| Viewing: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/buffer | [Back] [Original] |
Get to know MDN better
This feature is well established and works across many devices and browser versions. Its been available across browsers since July 2015.
The buffer accessor property of TypedArray instances returns the ArrayBuffer or SharedArrayBuffer referenced by this typed array at construction time.
// Create an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(8);
const uint16 = new Uint16Array(buffer);
console.log(uint16.buffer.byteLength);
// Expected output: 8
The buffer property is an accessor property whose set accessor function is undefined, meaning that you can only read this property. The value is established when the TypedArray is constructed and cannot be changed. TypedArray is one of the TypedArray objects.
Because a typed array is a view of a buffer, the underlying buffer may be longer than the typed array itself.
const buffer = new ArrayBuffer(8);
const uint16 = new Uint16Array(buffer);
uint16.buffer; // ArrayBuffer { byteLength: 8 }
const buffer = new ArrayBuffer(1024);
const arr = new Uint8Array(buffer, 64, 128);
console.log(arr.byteLength); // 128
console.log(arr.buffer.byteLength); // 1024
console.log(arr.buffer === buffer); // true
| Specification |
|---|
| ECMAScript 2027 LanguageSpecification # sec-get-%typedarray%.prototype.buffer |
This page was last modified on Jul 10, 2025 by MDN contributors.
TypedArrayObject/FunctionBigInt64ArrayBigUint64ArrayFloat16ArrayFloat32ArrayFloat64ArrayInt8ArrayInt16ArrayInt32ArrayUint8ArrayUint8ClampedArrayUint16ArrayUint32ArrayYour blueprint for a better internet.
Portions of this content are 19982026 by individual mozilla.org contributors. Content available under a Creative Commons license.
| Web Proxy Viewer | New URL | Original Page |