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.

The delete() method of Map instances removes the entry specified by the key from this Map.

Try it

const map = new Map();
map.set("bar", "foo");

console.log(map.delete("bar"));
// Expected result: true
// True indicates successful removal

console.log(map.has("bar"));
// Expected result: false

Syntax

mapInstance.delete(key)

Parameters

key

The key of the entry to remove from the Map object. Object keys are compared by reference, not by value.

Return value

true if an entry in the Map object has been removed successfully. false if the key is not found in the Map.

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.