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.
Theclear() method ofMap 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: 2map.clear();console.log(map.size);// Expected output: 0Syntax
js
clear()Parameters
None.
Return value
None (undefined).
Examples
Using clear()
js
const myMap = new Map();myMap.set("bar", "baz");myMap.set(1, "foo");console.log(myMap.size); // 2console.log(myMap.has("bar")); // truemyMap.clear();console.log(myMap.size); // 0console.log(myMap.has("bar")); // falseSpecifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-map.prototype.clear |