I am looking for a better way of doing the JacaScript part.

Question

https://code.sololearn.com/W7Qxj9yOs6lq/?ref=app

Answer 1

something like this?
https://code.sololearn.com/WWxIU0UN9Fr3/?ref=app

Answer 2

one less loop
https://code.sololearn.com/Wf0tBA5OfQfP/?ref=app

Answer 3

Another Alternative base on Gordon first edit. Used template literals and the repeat() string method to create table body.
https://code.sololearn.com/W9KjJzSl4sck/#js