JavaScript · Typed arrays and encoding

ArrayBuffer

A fixed-length block of raw bytes. Views such as Uint8Array read and write it.

javascriptRunnable example javascript course

Syntax

new ArrayBuffer(byteLength)

Example

Try it

const buffer = new ArrayBuffer(4);
console.log(buffer.byteLength);

Reference pages are the quick answer. The course explains the why, shows the full example and ends with a challenge.