How I put a back button in this please se?

Question

I want put a back button after clicking time. Time will show but I don't know how I put a back button here. Please help
https://code.sololearn.com/W8u3U4Zn172T/?ref=app

Answer 1

You are overwriting whole DOM by document.body.innerHTML. It will be more efficient. If you do document.x.innerHTML.

Answer 2

You should use CSS

Add another div element( with time and back button) in html which opens on clicking time.

Set display:none(in CSS) for the div element and display:block for the main one( which happens on clicking back button)