w3schools is a very good learning platform. but there is a lot that should be added.
1) The online code compiler of w3schools is a very poor quality and low level compiler. you should add features like auto completion, highlite mistakes, multiple files and please make it faster. it is very slow for profassional work. have a look at this compiler. and you will notice the diffrence: visit online gdb
2) we should be able to publish our code on w3schools. there should be a place where we could publish our code. and ask for advise.
Thanks
faheem-maker