Extended Image Tracking on webAR?

I'm trying to have extended image tracking on webar using AR.js but have been unable to find much documented information about it online. One page says that it is not supported, but it's a post from 5 years ago, so it's not reliable information. My apologies if I've missed any updates. If it helps at all, here's the link to my code:

https://glitch.com/edit/#!/brass-cloudy-appeal



