Cannot read property 'addEventListener'

Question

Uncaught TypeError: Cannot read property 'addEventListener' of null

Answer 1

element=document.querySelector("#btn");
querySelector use css selector syntax ;)

Answer 2

you probably attempt to access a dom element either wich doesn't exist or is not available when getting its reference...
without your code, enumerating all possible solutions would be too long: share a link to it ^^

Answer 3

https://code.sololearn.com/W78ton08NiLb/?ref=app

Answer 4

Not able to understand and debug even from previous asked questions.

Answer 5

oh man 😍👍