Canvas why do I get null error getContext

Question

im unsure why

https://code.sololearn.com/WTx5LmW0IT7t/?ref=app

Answer 1

Check this post:
https://www.sololearn.com/post/7444/?ref=app

Answer 2

thanks i guess i dont understand. i tried but not sure

Answer 3

nm figured it out thanks ajax

Answer 4

init() is called before the html canvas element is defined