JavaScript Maps

A Map holds key-value pairs where the keys can be any datatype. A Map remembers the original insertion order of the keys.

Creating a Map

You can create a Map and add elements with the set() method:

const fruits = new Map();
fruits.set("apples", 500);
fruits.set("bananas", 300);

Map Methods

• set() - Sets the value for a key in a Map.
• get() - Gets the value for a key in a Map.
• delete() - Removes a Map element specified by the key.
• has() - Returns true if a key exists in a Map.
• forEach() - Calls a function for each key/value pair.
• entries() - Returns an iterator with the [key, value] pairs.