A lot of those free tutorials are teaching people to do things wrong, making use of glitches and bad coding practices that only work in one browser or another. A great example of this is the “ant colony” page linked in the article. It’s full of bad coding practices (script tags outside of the body and head, as an example), and flat out coding errors that cause it to crash in several browsers (line 42, firefox and chrome both die and won’t run it - works fine on mobile, but nowhere else I’ve got access to).
And then of course, because the tutorial they found on youtube (why does anyone ever go to youtube for coding lessons? It makes no sense…) said that it works, and it worked in the only browser they ever tested it on, they declare it perfect and don’t bother testing anywhere else.
Grumble grumble lawn grumble… kids these days.
