Developer using IDE where his code was animating on screen as he typed.

Answer 1

In that case codepen is ideal for you!!

Answer 2

You can make it easily by set autosave on your text editor. And make your browser auto refresh.

Answer 3

@0f0
asking about an IDE which shows input as you type like https://www.codepen.io for web development/design I guess

https://www.sololearn.com/discuss/333866/?ref=app

Answer 4

what is your question?

Answer 5

There is an editor called Brackets that can do that.