Set
objects are collection of values.
Creating Set
// Create a Set const someSet = new Set(["a","b"]);
Adding item to Set
const someSet = new Set(["a","b"]); // adding element someSet.add("c"); console.log(someSet); // ["a","b","c"] // adding existing element someSet.add("c"); console.log(someSet); // ["a","b","c"]
Checking if item exists in set
const someSet = new Set(["a","b"]); someSet.has("a"); // true someSet.has("d"); // false