`AsyncFunction.prototype` 属性表示 `AsyncFunction` 的原型对象。

## 描述

`AsyncFunction` 对象继承自 `AsyncFunction.prototype`。`AsyncFunction.prototype` 不能被修改。

## 属性

`AsyncFunction.constructor`
  默认值为 `AsyncFunction`。
`AsyncFunction.prototype[@@toStringTag]`
  返回 "AsyncFunction"。

## 规范

Specification | Status | Comment
--- | --- | ---
ECMAScript Latest Draft (ECMA-262) AsyncFunction.prototype | Draft | 最初定义在ES2017.

## 兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

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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
`prototype` | Chrome Full support 55 | Edge Full support 15 | Firefox Full support 52 | IE No support No | Opera Full support 42 | Safari ? | WebView Android ? | Chrome Android Full support 55 | Edge Mobile ? | Firefox Android Full support 52 | Opera Android Full support 42 | Safari iOS ? | Samsung Internet Android Full support 6.0 | nodejs Full support 7.6.0 Full support 7.6.0 Full support 7.0.0 Disabled Disabled From version 7.0.0: this feature is behind the `--harmony` runtime flag.

### Legend

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

## 参见

- `AsyncFunction`
- `Function`