Oh no, if you follow the instructions on that site you're going straight to code hell. Yes it is very approachable and enticing, but it's wrong.

I came out of it just fine. Satan had some good contacts.

That's the problem though, people who have been misled by w3schools often don't even realise it.

I did. I am fully aware of the inaccurate content I ran with from w3schools, which is why I corrected myself. That does not change the fact w3schools was there when I needed a source that was easy to understand.

That's a tad presumptuous.