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      JavaScript ArrayBuffer byteLength

      **byteLength**访问器属性表示一个ArrayBuffer 对象的字节长度。

      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.

      语法

      arraybuffer.byteLength
      

      描述

      byteLength属性是一个访问器属性,它的set访问器函数是undefined,这意味着你只能读这个属性。 该值在数组创建时确定,并且不可变更。如果这个ArrayBuffer 被移除,则此属性返回0。

      示例

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

      规范

      规范状态备注
      Typed Array SpecificationObsoleteSuperseded by ECMAScript 6.
      [ECMAScript 2015 (6th Edition, ECMA-262)
      ArrayBuffer.prototype.byteLength](https://www.ecma-international.org/ecma-262/6.0/#sec-get-arraybuffer.prototype.bytelength)StandardInitial definition in an ECMA standard.

      浏览器兼容性

      The compatibility table on this page is generated from structured data. If you’d like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

      Update compatibility data on GitHub

      DesktopMobileServer
      ChromeEdgeFirefox
      byteLengthChrome Full support 7Edge Full support 12Firefox Full support 4

      Legend

      Full support  

      Full support

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