SharedArrayBuffer() constructor

The SharedArrayBuffer() is used to create a SharedArrayBuffer object representing a generic, fixed-length raw binary data buffer, similar to the ArrayBuffer object.

Syntax

new SharedArrayBuffer()
new SharedArrayBuffer(length)

Parameters

length Optional

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

Return value

A new SharedArrayBuffer object of the specified size. Its contents are initialized to 0.

Examples

Always use the new operator to create a SharedArrayBuffer

SharedArrayBuffer constructors are required to be constructed with a new operator. Calling a SharedArrayBuffer constructor as a function without new will throw a TypeError.

var sab = SharedArrayBuffer(1024);
// TypeError: calling a builtin SharedArrayBuffer constructor
// without new is forbidden

var sab = new SharedArrayBuffer(1024);

Specifications

Browser compatibility

See also

• Atomics
• ArrayBuffer
• JavaScript typed arrays