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JavaScript Reflect construct() Method

Last Updated : 12 Jul, 2025

JavaScript Reflect.construct() method in JavaScript is used to call a new target. It gives also the added option to specify a different prototype.

Syntax:

Reflect.construct(para1, para2, para3)

Parameters: This method accepts three parameters as mentioned above and described below:

  • para1: This parameter is the target function that is going to be called.
  • para2: This parameter is an array-like object specifying the argument with which the target should be called.
  • para3: It is an optional parameter. The constructor whose prototype should be used.

Return Value: This method returns a new instance of the target.

Exceptions: A TypeError is an exception given as the result when the target is not a constructor.

The below examples illustrate the Reflect.construct() method in JavaScript:

Example 1: This example shows the basic use of the Reflect.construct() method in JavaScript.


Output
6
6
8
6

Example 2: This example shows the basic use of the Reflect.construct() method in JavaScript.


Output
one
one
true
false
false
true

Supported Browsers:

The browsers are supported by JavaScript Reflect.apply() Methods are listed below:

  • Google Chrome 49 and above
  • Edge 12 and above
  • Firefox 42 and above
  • Opera 36 and above
  • Safari 10 and above

We have a complete list of Javascript Reflects methods, to check those go through the JavaScript Reflect Reference article.

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