Help with buttons on JavaScript

Question

So I'm trying to make a calculator, my idea is click on a button to show up the options. Has some way to when click on a button create a personalized button and hide the first button ?
https://code.sololearn.com/WyhP4Q0E68aA/?ref=app

Answer 1

Try this
https://code.sololearn.com/Wzacb7bKlnvP/?ref=app

Answer 2

really thanks