Learn how to use files as data information, you will create a Contact App that will store information Like Name, Last Name, Telephone,
Creating and reading file
I would like to show you how it works, how to use some helper that it provide, for example if you are working with dates you use
var d= new Date(); the date has a helper called date-- and it has all function derived from Date(), some functions are
toLocaleDateString(), toLocaleTimeString() and so on.