How to see JavaScript errors in the app?

Question

Hi
I can’t see why some nice codes don’t work in the sololearn app on the iPhone
For example, this code from Elizabeth
https://code.sololearn.com/WztH7D9QSoIh/?ref=app

It should be the way to see what is going on.
Btw , the code works properly in chrome and safari on the same phone- it is iPhone se.
Thanks

Answer 1

Have you tried console.log?

Answer 2

How it can help? when i run the code it shows the background but there is no ball, no animation

Answer 3

I figured it out, console.log helped - thank you @NOOB :)
<meta name="viewport" content="width=device-width,initial-scale=1">
This line will resize the screen's width correctly on the iphone

Answer 4

on me it's working and have iPad

Answer 5

Maybe Apple's trying to poke fun at you. I don't know.