javascript project ideas

/*If you're a begginer coder/at JavaScript I reccomend doing
simple things that don't do something cool or fun, but more for 
a learning matter. After that, I highly reccomend doing a 
clicker/idle game using HTML since it's one of the easiest
types of games to code. While you are doing this, it'll allow
you to think of great things you could do with JavaScript and
so keep them in a place you won't forget, so you can do those 
projects later!*/1: Make a todo list using I/O
2: Make a virtual save (include serlization)
3: Password saver app
4: Andriod app