What is the differences of my code? Why get Value1 cannot be run or no output? Actually, these code adopt same Principle.

Question

https://code.sololearn.com/WNsTSFVv10iO/?ref=app
https://code.sololearn.com/W7I92bB0G6Qb/?ref=app

Answer 1

Yeah, easy to get confused there; html is not case sensitive (<p> is the same as <P>), but JS very much is.

Answer 2

1. Close <titl
2. Id != ID
3. You forgot the .value

Answer 3

It was stated that html is not case sensitive Oh, I see, background-color if written in javaScript become camel case backgroundColor. Thank you very much. This is a little things, but it's so important and essentials.