ArrayBuffer() constructor

length

The size, in bytes, of the array buffer to create.

options Optional

An object, which can contain the following properties:

maxByteLength Optional

The maximum size, in bytes, that the array buffer can be resized to.

A new ArrayBuffer object of the specified size, with its maxByteLength property set to the specified maxByteLength if one was specified. Its contents are initialized to 0.

RangeError

Thrown in one of the following cases:

• length or maxByteLength is larger than Number.MAX_SAFE_INTEGER (≥ 2⁵³) or negative.
• length is larger than maxByteLength.

In this example, we create a 8-byte buffer with a Int32Array view referring to the buffer:

const buffer = new ArrayBuffer(8);
const view = new Int32Array(buffer);

In this example, we create a 8-byte buffer that is resizable to a max length of 16 bytes, then resize() it to 12 bytes:

const buffer = new ArrayBuffer(8, { maxByteLength: 16 });

buffer.resize(12);

• Polyfill of ArrayBuffer in core-js
• JavaScript typed arrays guide
• SharedArrayBuffer