How do i make an app that works with internet

Question

hello coders I wish to make an app that works when user turn on data, with basic HTML,CSS and js, I wonder how this is done. or are app also hosted as websites?

Answer 1

Check out https://www.tutorialspoint.com/socket.io/
And then you can host it on https://devcenter.heroku.com/articles/getting-started-with-nodejs for free!

Answer 2

ajax,node,php

Answer 3

you should work with Scripts

Answer 4

js or php?