JavaScript Set add() Method
The Set.add() method in JavaScript is used to append an element with a specified value in a set. It modifies the existing set by appending the new element but does not return a new set.
The Set.add() method does not modify the set if the element with a specified value already exists in the set.
Syntax:
mySet.add(value);
Parameters:
- value: It is the value of the new element that is about to get appended to our set.
Return value:
It returns the set object with an added value
Example 1: In this example, we have added two numbers 23 and 12 into the set.
Javascript
// Create a new set using Set() constructor let myset = new Set(); // Append new elements to the // set using add() method myset.add(23); myset.add(12); // Print the modified set console.log(myset); |
Set(2) { 23, 12 }
Example 2: Adding elements using add() with chaining and checking if duplicate values exist or not.
Javascript
// Create a new set using Set() constructor let myset = new Set(); // Append new elements to the set // using add() method with chaining myset.add(23).add(12); // Appending an already existing // element to the set this // element will not be added to the set // as it contains only distinct elements myset.add(23); // Print the modified set console.log(myset); |
Set(2) { 23, 12 }
Supported Browsers:
- Chrome 38 and above
- Edge 12 and above
- Firefox 24 and above
- Opera 25 and above
- Safari 8 and above
We have a complete list of Javascript Set methods, to check those please go through this Sets in JavaScript article.
We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.
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