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The delete() method removes the specified element from a Map object by key.




The key of the element to remove from the Map object.

Return value

true if an element in the Map object existed and has been removed, or false if the element does not exist.


Using delete()

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

myMap.delete('bar'); // Returns true. Successfully removed.
myMap.has('bar');    // Returns false. The "bar" element is no longer present.


Specification Status Comment
ECMAScript Latest Draft (ECMA-262)
The definition of 'Map.prototype.delete' in that specification.
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Map.prototype.delete' in that specification.
Standard Initial definition.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
deleteChrome Full support 38Edge Full support 12Firefox Full support 13IE Full support 11Opera Full support 25Safari Full support 8WebView Android Full support 38Chrome Android Full support 38Firefox Android Full support 14Opera Android Full support 25Safari iOS Full support 8Samsung Internet Android Full support Yesnodejs Full support 0.12
Full support 0.12
Full support 0.10
Disabled From version 0.10: this feature is behind the --harmony runtime flag.


Full support  
Full support
User must explicitly enable this feature.
User must explicitly enable this feature.

See also

Document Tags and Contributors

Cập nhật lần cuối bởi: alattalatta,