How to fix this error 'cannot set properties of null (setting 'innerhtml')'?

Question

https://code.sololearn.com/Wm8FgJxX10pY/?ref=app

Answer 1

The Window: load event

And a function. Should get it working.

window.onload = function myFunction(){

let klik = document.getElementById("isi");
klik.innerHTML = "taik";
}

Answer 2

Thank you. It is works