W3cubDocs

/JavaScript

map.clear

The clear() method removes all elements from a Map object.

Syntax

myMap.clear();

Return value

undefined.

Examples

Using the clear method

var myMap = new Map();
myMap.set('bar', 'baz');
myMap.set(1, 'foo');

myMap.size;       // 2
myMap.has('bar'); // true

myMap.clear();

myMap.size;       // 0
myMap.has('bar')  // false

Specifications

Browser compatibility

Feature Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 38 12 19 11 25 8
Feature Android webview Chrome for Android Edge mobile Firefox for Android Opera Android iOS Safari Samsung Internet
Basic support 38 38 12 19 25 8 ?

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/clear