--- date: 20201012 id: ee9a4791-e3e8-4437-98fa-6c2d34be1a8e title: JavaScript Sets --- # Introduction A [Set](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) is a collection of unique elements. # Example ``` javascript const arr = [5, 1, 5, 7, 7, 5]; const unique = [...new Set(arr)]; // [ 5, 1, 7 ] ```