What's the error ['Solved']

Question

https://code.sololearn.com/WBGFt296iUkP/?ref=app

Answer 1

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

Answer 2

Abhishek Singh
As your JS code is running even before the document has loaded, it throws an error that there is no such element.
As suggested by Aymane Boukrouh , you need to wrap the entire js code inside a function which runs only after the Window is loaded.

Answer 3

Aymane Boukrouh Thank you for the code
Hanuma Ukkadapu Thank you for explanation