ArrayBuffer

The ArrayBuffer object is used to represent a generic raw binary data buffer.

It is an array of bytes, often referred to in other languages as a “byte array”. You cannot directly manipulate the contents of an ArrayBuffer; instead, you create one of the typed array objects or a DataView object which represents the buffer in a specific format, and use that to read and write the contents of the buffer.

The ArrayBuffer() constructor creates a new ArrayBuffer of the given length in bytes. You can also get an array buffer from existing data, for example, from a Base64 string or from a local file.