SharedArrayBuffer.prototype.byteLength

The byteLength accessor property of {{jsxref("SharedArrayBuffer")}} instances returns the length (in bytes) of this SharedArrayBuffer.

Description#

The byteLength 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 shared array is constructed and cannot be changed.

Examples#

Note that these examples cannot be run directly from the console or an arbitrary web page, because SharedArrayBuffer is not defined unless its security requirements are met.

Using byteLength#

const sab = new SharedArrayBuffer(1024);
sab.byteLength; // 1024

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

• {{jsxref("SharedArrayBuffer")}}