JavaScript Handler construct() Method

JavaScript handler.construct() method in JavaScript is a trap for the new operation and this method returns an object.

Syntax: 

const p = new Proxy(target, {
 construct: function(target, argumentsList, newTarget) {
 }
}); 

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

• Target: This parameter holds the target object.
• argumentsList: This parameter holds the list of the constructor.
• newTarget: This parameter holds the constructor that was originally called, p above.

Return value: This method returns an object.

Below examples illustrate the handler.construct() method in JavaScript:

Example 1: In this example, we will set a trap for an operation and return a new object using the handler.construct() method in JavaScript.

Output:

"Users at Geeksforgeeks are called"
"Geeks"
"{
 "Value": "Hello to anybody"
}"

Example 2: In this example, we will set a trap for an operation and return a new object using the handler.construct() method in JavaScript.

Output: 

"Value: 4"
"New Value: 13.333333333333334"

Supported Browsers: The browsers supported by handler.construct() method are listed below: 

• Google Chrome 49 and above
• Firefox 18 and above
• Opera 36 and above
• Safari 10 and above
• Edge 12 and above

We have a complete list of Javascript Proxy/handler methods, to check those go through the Javascript Proxy/handler Reference article.