Atomics.load()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since December 2021.

Atomics.load() 静态方法返回数组中指定位置的值。

尝试一下

// Create a SharedArrayBuffer with a size in bytes
const buffer = new SharedArrayBuffer(16);
const uint8 = new Uint8Array(buffer);
uint8[0] = 5;

// 5 + 2 = 7
console.log(Atomics.add(uint8, 0, 2));
// Expected output: 5

console.log(Atomics.load(uint8, 0));
// Expected output: 7

语法

js
Atomics.load(typedArray, index)

参数

typedArray

一个整数类型数组。Int8ArrayUint8ArrayInt16ArrayUint16ArrayInt32ArrayUint32ArrayBigInt64ArrayBigUint64Array 之一。

index

typedArray 中的要加载的位置。

返回值

给定位置的值(typedArray[index])。

异常

TypeError

如果 typedArray 不是允许的整数类型数组之一,则抛出该异常。

RangeError

如果 index 超出 typedArray 的范围,则抛出该异常。

示例

使用 load()

js
const sab = new SharedArrayBuffer(1024);
const ta = new Uint8Array(sab);

Atomics.add(ta, 0, 12);
Atomics.load(ta, 0); // 12

规范

Specification
ECMAScript® 2025 Language Specification
# sec-atomics.load

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
load

Legend

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Full support
Full support

参见