What is Set in JavaScript

Set is another data structure in JavaScript which is similar to Array but the values are unique. It is a collection of elements where each element is stored as a value without any keys.

const roadmap = new Set();
roadmap.add('JavaScript');
roadmap.add('JavaScript');
 
roadmap.add('dynamic');
roadmap.add(1995);
 
console.log(roadmap.size); // 3, because the value 'JavaScript' is already present in the set
console.log(roadmap.has('JavaScript')); // true
 
roadmap.delete('JavaScript');
console.log(roadmap.has('JavaScript')); // false
console.log(roadmap.size); // 2