javascript - How do I find the type error in my code when you cant find the error?

Question

Hi I'm new to JavaScript and I'm doing some exercises on codepen and one of my bugs is currently this:

Uncaught TypeError: Cannot set property 'innerText' of null at https://cdpn.io/cp/internal/boomboom/pen.js?key=pen.js-d94fc329-380b-daf1-fc88-5aa0215c449f:101

I checked the code from the exercise and i cant seem to figure out what's causing this.

question from:https://stackoverflow.com/questions/65899060/how-do-i-find-the-type-error-in-my-code-when-you-cant-find-the-error

Answer 1

Waitting for answers