DataView.prototype.byteOffset

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.

byteOffset 属性描述了从 ArrayBuffer 开始的字节偏移量。

尝试一下

// Create an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(16);

const view = new DataView(buffer, 12, 4); // From byte 12 for the next 4 bytes

console.log(view.byteOffset);
// Expected output: 12

语法

dataview.byteOffset

描述

byteOffset 属性是一个获取 (accessor) 属性,它的 set 属性为 undefined,这意味着它是只读的。值在 DataView 被创建时就确定了,且不能改变。

示例

使用 byteOffset 属性

js
var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.byteOffset; // 0 (没有指定偏移量)

var dataview2 = new DataView(buffer, 3);
dataview2.byteOffset; // 3 (在构造 DataView 时指定)

规范

Specification
ECMAScript® 2025 Language Specification
# sec-get-dataview.prototype.byteoffset

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
byteOffset

Legend

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Full support
Full support

参见