I need help debugging this code

Question

This code returns an error on line 29 but I’ve failed to rectify it.
All kinds of help is highly appreciated
🙏🏽 Thank you 😊
https://code.sololearn.com/Wj0M4WHqEeyG/?ref=app

Answer 1

You have to surround your complete JavaScript with

window.onload = function(){

/* here comes your code */

}

This ensures that your JavaScript waits to start until the whole HTML code is loaded which is done by the onload-event.

The error is caused by the fact that the JavaScript runs before the HTML is loaded completely, and that's the reason why some elements, which you refer to in the JavaScript, are not present yet.

improved code:
https://code.sololearn.com/W1LRFyOMVVkr/?ref=app

Answer 2

Jan Markus thank you so much 🤝🏽

Answer 3

Izaiah Kay

You are welcome! 🙂👍

Answer 4

Izaiah Kay

Now I have also improved the code that the score is adapted during the quiz.
Only at the last question there has to be inserted a delay before proceeding to the evaluation.

Answer 5

Thank you so much Jan Markus
Here’s the debugged code. With credits to you

https://code.sololearn.com/Wj0M4WHqEeyG/?ref=app

Answer 6

Jan Markus

Thats very cool