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---
title: Map.prototype.clear()
short-title: clear()
slug: Web/JavaScript/Reference/Global_Objects/Map/clear
page-type: javascript-instance-method
browser-compat: javascript.builtins.Map.clear
sidebar: jsref
---
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()
```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
{{Specifications}}
## Browser compatibility
{{Compat}}
## See also
- {{jsxref("Map")}}
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