In this section, we will learn what the delete() method is and how to use it in JavaScript.

What is JavaScript Map delete() Method?

We use the `delete()` method to delete a specific key from a map object.

Note: when a key is removed from a map, its value will be removed automatically as well.

JavaScript Map delete() Method Syntax:

delete(key);

delete() Function Parameters:

This method takes one argument and that is the key in which we want to remove.

delete() Function Return Value:

If the method removed the target key, it will return the value `true` which means the operation ran successfully. Otherwise it will return the value `false`.

One of the reasons that this method might return the value false is because the target key might not exist in the target map.

Example: using Map delete() method in JavaScript

const map = new Map();
map.set("John","222-22222222");
map.set(22 , 2000);
map.set(true, false); 
map.set("Jack", "333-3234232");

if (map.delete('John')){
  console.log(`The key 'John' successfully removed from the map.`);
}

Output:

The key 'John' successfully removed from the map.