Set.prototype.clear()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The clear()
method of Set
instances removes all elements from this set.
Try it
const set1 = new Set();
set1.add(1);
set1.add("foo");
console.log(set1.size);
// Expected output: 2
set1.clear();
console.log(set1.size);
// Expected output: 0
Syntax
js
clear()
Parameters
None.
Return value
None (undefined
).
Examples
Using the clear() method
js
const mySet = new Set();
mySet.add(1);
mySet.add("foo");
console.log(mySet.size); // 2
console.log(mySet.has("foo")); // true
mySet.clear();
console.log(mySet.size); // 0
console.log(mySet.has("foo")); // false
Specifications
Specification |
---|
ECMAScript® 2025 Language Specification # sec-set.prototype.clear |
Browser compatibility
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
clear |
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.