Map.prototype.delete()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Thedelete() method ofMap instances removes the entry specified by the key from thisMap.
Try it
const map = new Map();map.set("bar", "foo");console.log(map.delete("bar"));// Expected result: true// True indicates successful removalconsole.log(map.has("bar"));// Expected result: falseSyntax
js
mapInstance.delete(key)Parameters
Return value
true if an entry in theMap object has been removed successfully.false if the key is not found in theMap.
Examples
Using delete()
js
const myMap = new Map();myMap.set("bar", "foo");console.log(myMap.delete("bar")); // Returns true. Successfully removed.console.log(myMap.has("bar")); // Returns false. The "bar" element is no longer present.Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-map.prototype.delete |