What is the use of the Clear method in Sets in JavaScript ?

The clear() method in JavaScript Sets is used to remove all elements from a Set, effectively making the Set empty. It does not take any arguments and does not return any value. After calling the clear(), the Set will have a size of 0.

Example: Here, the clear() method is called on the mySet Set, removing all elements and leaving an empty Set.

Javascript

let mySet = new Set([1, 2, 3, 4, 5]);

console.log(mySet); // Output: Set { 1, 2, 3, 4, 5 }

// Clear all elements from the Set
mySet.clear();

console.log(mySet); // Output: Set {}

Output

Set(5) { 1, 2, 3, 4, 5 }
Set(0) {}