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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® 2026 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