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Map.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 Map instances removes all elements from this map.

Try it

const map = new Map();

map.set("bar", "baz");
map.set(1, "foo");

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

map.clear();

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

Syntax

clear()

Parameters

None.

Return value

None (undefined).

Examples

Using clear()

const myMap = new Map();
myMap.set("bar", "baz");
myMap.set(1, "foo");

console.log(myMap.size); // 2
console.log(myMap.has("bar")); // true

myMap.clear();

console.log(myMap.size); // 0
console.log(myMap.has("bar")); // false

Specifications

Specification
ECMAScript® 2026 Language Specification> # sec-map.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