How to check if Set contains Specific Element in JavaScript?

JavaScript – Check if Set contains a Specific Element

To check if this Set contains a specific element in JavaScript, call has() method on this set and pass the element, to search for, as argument to it.

has() method returns a boolean value. The return value is true if the element is present in the set, else, false.

Syntax

The syntax to check if specific element e is present in a Set set1 using has() method is

set1.has(e)

Examples

In the following example, we take a Set with initialised with three element. We shall check if the element 'banana' is present in this Set using has() method.

index.html

Now, let us check if a key ‘cherry’ is present in this set.

index.html

Conclusion

In this JavaScript Tutorial, we learned how to check if a specific element is present in a Set in JavaScript using has() method, with examples.