DataView.prototype.getUint8()

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.

getUint8() 方法从 DataView相对于起始位置偏移 n 个字节处开始,获取一个无符号的 8-bit 整数 (一个字节).

尝试一下

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

const view = new DataView(buffer);
view.setUint8(1, 255); // Max unsigned 8-bit integer

console.log(view.getUint8(1));
// Expected output: 255

语法

dataview.getUint8(byteOffset)

参数

byteOffset

偏移量,单位为字节,从头开始计算。

抛出错误

RangeError

如果 byteOffset 超出了视图能储存的值,就会抛出错误。

描述

没有对齐约束; 多字节值可以从任何偏移量获取。

示例

js
var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.getUint8(1); // 0

规范

Specification
ECMAScript® 2025 Language Specification
# sec-dataview.prototype.getuint8

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
getUint8

Legend

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Full support
Full support

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