ArrayBuffer.prototype.byteLength
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
ArrayBuffer
实例的 byteLength
访问器属性返回该数组缓冲区的长度(以字节为单位)。
尝试一下
描述
byteLength
属性是一个访问器属性,它的 set 访问器函数是 undefined
,这意味着你只能读取这个属性。该值在数组创建时确定,并且无法修改。如果这个 ArrayBuffer
被分离,则此属性返回 0。
示例
使用 byteLength
js
const buffer = new ArrayBuffer(8);
buffer.byteLength; // 8
规范
Specification |
---|
ECMAScript Language Specification # sec-get-arraybuffer.prototype.bytelength |
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