JavaScript Tutorial
JavaScript Sets: All Methods with Examples
Table of Contents
- Introduction
- What is a JavaScript Set?
- Why Use Set in JavaScript?
- Methods of Sets in JavaScript
- JS Set Properties
- How to Find the Difference of Two Sets?
- Browser Compatibility
- JavaScript Set vs Array
- Best Practices for Using JavaScript Sets
- Advantages of JavaScript Sets
- Limitations of JavaScript Sets
FAQs about JavaScript Set
A Set enforces uniqueness of values and does not maintain order, while an Array can have duplicates and is ordered.
Yes, Sets can store objects, but each object is considered unique based on its reference.
The Set will silently ignore the duplicate value.
Yes, Sets are iterable, and you can use for...of loops, forEach, or iterators like values().
You can use the spread operator:
let set = new Set([1, 2, 3]);
let array = [...set];
Sets provide faster lookup and uniqueness checks compared to Arrays, but they are not indexed.
No, Sets are not supported in older browsers like Internet Explorer. Use a polyfill if needed.
