The clear() method of Set instances removes all elements from this set.
Syntax
clear()
Parameters
None.
Return value
None (undefined).
Examples
Using the clear() method
const mySet = new Set();
mySet.add(1);
mySet.add("foo");
console.log(mySet.size); // 2
console.log(mySet.has("foo")); // true
mySet.clear();
console.log(mySet.size); // 0
console.log(mySet.has("bar")); // false