You should already know what Maps are from Data types, but you should check the following link anyway, and make sure you have no questions.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map
You should already know what Maps are from Data types, but you should check the following link anyway, and make sure you have no questions.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map