Web Reference: 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. Dec 9, 2025 · Set objects are collections of values. A value in the set may only occur once; it is unique in the set's collection. You can iterate through the elements of a set in insertion order. Sets are commonly used in scenarios where you need to work with collections of unique elements. The Set object lets you store unique values of any type, whether primitive values or object references. Since a Set automatically removes duplicates, you can convert an array to a Set and back to an array to remove duplicate elements. No output yet.
YouTube Excerpt: In this video we will look at some of the new data structures. ES6 Introduced Maps and
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