Can you use javascript functions to return values to use in HTML?

Question

I can’t really explain, so I attached a code

https://code.sololearn.com/Wv9VORvMZyJW/?ref=app

Answer 1

https://code.sololearn.com/W84sj58fnaOn/?ref=app

you need to use 'onload' event (directly on img tag)...

however, you could do it by css:

style="width:100vw;height:100vh;"

or through css background image on another element if you want to preserve aspect ratio ;)

Answer 2

thank you, just what i was looking for