Line 7 / Cannot read style of null

Question

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

Answer 1

Element ID used in JS must match that in HTML. You have "Lazer" in HTML but you have "lazer" in JS ...

Line 3

let lazer = document.getElementById('Lazer');

Answer 2

Ipang thank you!