ECMAScript 2015 introduced a Map class as part of the JavaScript API. We developed our Dictionary class based on the ES2015 Map class.
Let's learn how we can use the native Map class, as well. Let's use the same examples we used to test our Dictionary class:
const map = new Map();map.set('Gandalf', 'gandalf@email.com');map.set('John', 'johnsnow@email.com');map.set('Tyrion', 'tyrion@email.com');console.log(map.has('Gandalf')); // trueconsole.log(map.size); // 3console.log(map.keys()); // MapIterator {"Gandalf", "John", "Tyrion"} ...