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Reflect.apply()

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

Syntax

Reflect.apply(target, thisArgument, argumentsList)

Parameters

target

The target function to call.

thisArgument

The value of this provided for the call to target.

argumentsList

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

Return value

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

Exceptions

A TypeError, if the target is not callable.

Description

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.

Examples

Using 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"

Specifications

Browser compatibility

Desktop Mobile Server
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet Deno Node.js
apply
49
12
42
No
36
10
49
49
42
36
10
5.0
1.0
6.0.0

See also

© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/apply