Can anybody help me with my code?

Question

Hello :)

I am new to JavaScript. I made a little game in a tutorial. On my desktop it runs without errors. In Sololearn it says: "Uncaught TypeError: Cannot read property 'appendChild' of null Line: 19".

https://code.sololearn.com/W52aUO0LEzWn

Can anybody help me and give me a hint?

Thank you!

Regards,
Steffen

Answer 1

Hi,place that code in

window.onload=function(){

Js code goes here

}

sololearn places script inside head tag ,so selecting an element before the dom loads fully raises that error

Answer 2

You are awesome, thank you so much!