在此页

• 句法
• 描述
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

静态 Reflect .apply() method calls a target function with arguments as specified.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

句法

Reflect.apply(target, thisArgument, argumentsList)
					

参数

target

The target function to call.

thisArgument

值 this provided for the call to target .

argumentsList

An array-like object specifying the arguments with which target should be called.

返回值

The result of calling the given target function with the specified this value and arguments.

异常

A TypeError , if the target is not callable.

描述

In ES5, you typically use the Function.prototype.apply() method to call a function with a given this value and arguments provided as an array (or an array-like object ).

Function.prototype.apply.call(Math.floor, undefined, [1.75]);
					

With Reflect.apply() this becomes less verbose and easier to understand.

范例

使用 Reflect.apply()

Reflect.apply(Math.floor, undefined, [1.75]);
// 1;
Reflect.apply(String.fromCharCode, undefined, [104, 101, 108, 108, 111])
// "hello"
Reflect.apply(RegExp.prototype.exec, /ab/, ['confabulation']).index
// 4
Reflect.apply(''.charAt, 'ponies', [3])
// "i"
					

规范

规范
ECMAScript (ECMA-262) The definition of 'Reflect.apply' in that specification.

浏览器兼容性

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. 更新 GitHub 上的兼容性数据

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
apply	Chrome 49	Edge 12	Firefox 42	IE No	Opera 36	Safari 10	WebView Android 49	Chrome Android 49	Firefox Android 42	Opera Android 36	Safari iOS 10	Samsung Internet Android 5.0	nodejs 6.0.0

图例

完整支持

完整支持

不支持

不支持

另请参阅

• Reflect
• Function.prototype.apply()

元数据

• 最后修改： Jan 15, 2020

相关话题

1. 标准内置对象
2. Reflect
3. 方法
   1. Reflect.apply()
   2. Reflect.construct()
   3. Reflect.defineProperty()
   4. Reflect.deleteProperty()
   5. Reflect.get()
   6. Reflect.getOwnPropertyDescriptor()
   7. Reflect.getPrototypeOf()
   8. Reflect.has()
   9. Reflect.isExtensible()
   10. Reflect.ownKeys()
   11. Reflect.preventExtensions()
   12. Reflect.set()
   13. Reflect.setPrototypeOf()
4. 继承：
5. Object
6. 特性
   1. Object.prototype.__proto__
   2. Object.prototype.constructor
7. 方法
   1. Object.prototype.__defineGetter__()
   2. Object.prototype.__defineSetter__()
   3. Object.prototype.__lookupGetter__()
   4. Object.prototype.__lookupSetter__()
   5. Object.prototype.hasOwnProperty()
   6. Object.prototype.isPrototypeOf()
   7. Object.prototype.propertyIsEnumerable()
   8. Object.prototype.toLocaleString()
   9. Object.prototype.toSource()
   10. Object.prototype.toString()
   11. Object.prototype.valueOf()
   12. Object.setPrototypeOf()