This is an experimental technology, part of the Harmony (EcmaScript 6) proposal.
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future version of browsers as the spec changes.
Summary
The delete() method removes the specified element from a Map object.
Syntax
myMap.delete(key);Parameters
- key
-
Required. The key of the element to remove from the
Mapobject.
Return value
Returns true if an element in the Map object has been removed successfully.
Examples
Example: Using the delete method
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.
Specifications
| Specification | Status | Comment |
|---|---|---|
| ECMAScript Language Specification 6th Edition (ECMA-262) | Draft | Initial definition. |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 31 | 13.0 (13.0) | 11 | Not supported | Not supported |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | Not supported | Not supported | 13.0 (13.0) | Not supported | Not supported | Not supported |
Chrome-specific notes
- The feature is available behind a preference. In
chrome://flags, activate the entry “Enable Experimental JavaScript”.