Map.prototype.clear()

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

js
clear()

Parameters

None.

Return value

None (undefined).

Examples

undefined

Using clear()

js
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

See also