ArrayBuffer.prototype.byteLength - JavaScript 编辑

The byteLength accessor property represents the length of an ArrayBuffer in bytes.

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The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

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 array is constructed and cannot be changed. This property returns 0 if this ArrayBuffer has been detached.

Examples

Using byteLength

var buffer = new ArrayBuffer(8);
buffer.byteLength; // 8

Specifications

Specification
ECMAScript (ECMA-262) The definition of 'ArrayBuffer.prototype.byteLength' in that specification.

Browser compatibility

BCD tables only load in the browser

See also

• ArrayBuffer