typedArray.byteOffset

typedArray.byteOffset

byteOffset访问器属性表示类型化数组距离其ArrayBuffer起始位置的偏移(字节数)。

语法

typedarray.byteOffset

描述

byteOffset是一个访问器属性,它的 set 访问器函数是undefined,意思是你只能够读取这个属性。它的值在TypedArray构造时建立,不能被修改。TypedArray是这里的TypedArray 对象之一。

示例

使用byteOffset 属性

var buffer = new ArrayBuffer(8 var uint8 = new Uint8Array(buffer uint8.byteOffset; // 0 (no offset specified) var uint8 = new Uint8Array(buffer, 3 uint8.byteOffset; // 3 (as specified when constructing Uint8Array)

规范

SpecificationStatusComment
ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'TypedArray.prototype.byteOffset' in that specification.StandardInitial definition.
ECMAScript Latest Draft (ECMA-262)The definition of 'TypedArray.prototype.byteOffset' in that specification.Draft

浏览器兼容性

FeatureChromeFirefox (Gecko)Internet ExplorerOperaSafari
Basic support7.04.0 (2)1011.65.1

FeatureAndroidChrome for AndroidFirefox Mobile (Gecko)IE MobileOpera MobileSafari Mobile
Basic support4.0(Yes)4.0 (2)1011.64.2