Dec 9, 2025 · The Set object lets you store unique values of any type, whether primitive values or object references.

A JavaScript Set is a collection of unique values. Each value can only occur once in a Set. The values can be of any type, primitive values or objects.

Sep 5, 2017 · JavaScript’s Set object comes with several built-in methods to add, remove, check, and iterate over values. Below are the most commonly used methods with syntax and examples.

After clearing, the size of the Set is 0. In JavaScript, you can perform set operations like union, intersection, difference, and symmetric difference using Sets.

Apr 4, 2025 · JavaScript set () tutorial shows how to work with Sets in JavaScript. The tutorial provides numerous examples to demonstrate Set operations in JS.

38 Sets (Set) ES6 38.1 Basic Set operations 38.1.1 Creating Sets 38.1.2 Adding, removing, checking membership 38.1.3 Determining the size of a Set and clearing it 38.2 Combining Sets: union, …

Jul 11, 2017 · The Set object lets you store unique values of any type, whether primitive values or object references. Syntax new Set([iterable]); Parameters iterable If an iterable object is passed, all of its …

Nov 6, 2025 · Learn how to use JavaScript Set objects to store unique values and perform efficient collection operations.

Jun 23, 2025 · Learn JavaScript Sets in depth with examples. Discover how to create Sets, add values, check for existence, iterate, and more.

Interactive API reference for the JavaScript Set Object. Sets are a collection of Objects where each object can only appear once in the set.