the link on the bottom for the API reference is broken
Thanks for letting us know. We have fixed the page. Here’s the GitHub commit for the fix:
You may not know, but the entire PlayCanvas Developer Site is open sourced on GitHub. I would recommend that if you find any more errors, that you submit issues there.
Furthermore, if you are feeling brave, you can submit pull requests to fix things yourself - or even add new content. We open sourced it to allow everyone to get involved and contribute. 
One step at a time , up until last week i had never programmed in javascript or new what a normal map was!
Playcanvas is so easy to use i am very impressed.
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