JavaScript Sets

A JavaScript Set is a collection of unique values. Each value can only occur once in a Set.

Creating a Set

You can create a Set from an array:

const letters = new Set(["a","b","c"]);

Set Methods

• add() - Adds a new element to the Set.
• delete() - Removes an element from a Set.
• has() - Returns true if a value exists in the Set.
• forEach() - Invokes a callback for each element.
• values() - Returns an iterator with all the values in a Set.