JavaScript - Set.intersection() Method

The Set.intersection() method in JavaScript takes another set object as a parameter and returns a new set object containing elements that are common to both the original Set and the provided Set.

To get a better understanding, let us assume there are two sets ("set1" and "set2"), if "set1" is the original set and "set2" is passed to the intersection() method, it returns a new set containing elements that are present in both set1 and set2.

Note − At the moment, this method has only limted availability. It only works in safari.

Syntax

Following is the syntax of JavaScript Set.intersection() method −

intersection(other)

Parameters

This method accepts the following parameter −

other − A Set object.

Return value

This method returns a new set object containing elements in both this set and the other set.

Examples

Example 1

In the following example, we are using the JavaScript Set.intersection() method return the common elements in both the sets.

<html>
<body>
   <script>
      const set1 = new Set([10, 20, 40, 60, 70]);
      const set2 = new Set([10, 40, 90]);
      document.write(set1.intersection(set2));
   </script>
</body>
</html>

If we execute the above program, it returns a new set objects containing {10, 40} as elements.

Example 2

If one of either set is empty, this method returns empty set object as result.

<html>
<body>
   <script>
      const set1 = new Set([]);
      const set2 = new Set([]);
      document.write(set1.intersection(set2));
   </script>
</body>
</html>

After executing the above program, it will return empty set object as result.