Error undefined

Question

Here is my web code. It tells me menu is undefined, why?
https://code.sololearn.com/WJvBk9LiVpJQ/?ref=app

Answer 1

The JavaScript file in SoloLearn is included at the top of the html file, before the body tag is even created.

So when you run it first, there is no body tag yet, and thus the error.

If you try this in your computer, and link the JavaScript file at the bottom, it should work fine.

Answer 2

Mohamed Habib you sadly can't include the JS file manually in SL, so no, it will not work.

Try to wrap it in window.onload function

Answer 3

Mohamed Habib here is an example:

https://code.sololearn.com/Wo4Uo2Bk0izt/?ref=app

Answer 4

Ok thanks a lot 👌

Answer 5

Aymane Boukrouh [INACTIVE]
Thanks !!