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 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

clear()

Parameters

None.

Return value

None (undefined).

Examples

Using the clear() method

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

	Desktop					Mobile							Server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS	Bun	Deno	Node.js
`clear`	38	12	19	25	8	38	19	25	8	3.0	38	8	1.0.0	1.0	0.12.0