Map.prototype.clear()

The clear() method of {{jsxref("Map")}} instances removes all elements from this map.

{{InteractiveExample("JavaScript Demo: Map.prototype.clear()")}}

```js interactive-example 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-nolint
clear()

Parameters#

None.

Return value#

None ({{jsxref("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#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

• {{jsxref("Map")}}