Set.prototype.clear() - JavaScript | MDN

Try it

const set = new Set();
set.add(1);
set.add("foo");

console.log(set.size);
// Expected output: 2

set.clear();

console.log(set.size);
// Expected output: 0

Syntax

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® 2027 Language Specification
# sec-set.prototype.clear

Browser compatibility

See also

Help improve MDN

Learn how to contribute

This page was last modified on by MDN contributors.