静态方法 `Atomics``.load()` 返回一个数组当中给定位置的值。

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## 语法

    Atomics.load(typedArray, index)

### 参数

`typedArray`
  一个共享的整型数组。可以是 `Int8Array`，`Uint8Array`，`Int16Array`，`Uint16Array`，`Int32Array` 或 `Uint32Array`.
`index`
  在 `typedArray` 中需要加载的位置。

### 返回值

给定位置的值 (`typedArray[index]`)。

### 异常

- 抛出 `TypeError`, 如果 `typedArray` 不是一个被允许的整型。
- 抛出 `TypeError`, 如果 `typedArray` 不是一个共享数组。
- 抛出 `RangeError`, 如果 `index` 超出 `typedArray` 的界限。

## 示例

    var sab = new SharedArrayBuffer(1024);
    var ta = new Uint8Array(sab);

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

## 规范

规范 | 状态 | 论述
--- | --- | ---
ECMAScript Latest Draft (ECMA-262) Atomics.load | Draft | Initial definition in ES2017.

## 浏览器兼容

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| Desktop | Mobile | Server
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | Safari on iOS | Samsung Internet | Node.js
`load` | Chrome Full support 68 Full support 68 No support 60 — 63 Notes Notes Chrome disabled `SharedArrayBuffer` on January 5, 2018 to help reduce the efficacy of speculative side-channel attacks. This was a temporary removal while mitigations were put in place. | Edge No support 16 — 17 Notes No support 16 — 17 Notes Notes Support was removed to mitigate speculative execution side-channel attacks (Windows blog). | Firefox Full support 57 Notes Disabled Full support 57 Notes Disabled Notes Support was disabled by default to mitigate speculative execution side-channel attacks (Mozilla Security Blog). Disabled From version 57: this feature is behind the `javascript.options.shared_memory` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. No support 55 — 57 No support 46 — 55 Disabled Disabled From version 46 until version 55 (exclusive): this feature is behind the `javascript.options.shared_memory` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. | IE No support No | Opera No support No | Safari No support 10.1 — ? | WebView Android No support 60 — 63 Notes No support 60 — 63 Notes Notes Chrome disabled `SharedArrayBuffer` on January 5, 2018 to help reduce the efficacy of speculative side-channel attacks. This is intended as a temporary measure until other mitigations are in place. | Chrome Android No support 60 — 63 Notes No support 60 — 63 Notes Notes Chrome disabled SharedArrayBuffer on January 5, 2018 to help reduce the efficacy of speculative side-channel attacks. This is intended as a temporary measure until other mitigations are in place. | Edge Mobile ? | Firefox Android Full support 57 Notes Disabled Full support 57 Notes Disabled Notes Support was disabled by default to mitigate speculative execution side-channel attacks (Mozilla Security Blog). Disabled From version 57: this feature is behind the `javascript.options.shared_memory` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. No support 55 — 57 No support 46 — 55 Disabled Disabled From version 46 until version 55 (exclusive): this feature is behind the `javascript.options.shared_memory` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. | Opera Android No support No | Safari iOS No support No | Samsung Internet Android No support No | nodejs Full support 8.10.0

### Legend

Full support
  Full support
No support
  No support
Compatibility unknown
  Compatibility unknown
See implementation notes.
  See implementation notes.
User must explicitly enable this feature.
  User must explicitly enable this feature.

## 参阅

- `Atomics`
- `Atomics.store()`