I wonder why they didn't contribute directly to https://github.com/ucisysarch/opencvjs. It was suffering from a bit of code rot so a lot of the demos no longer work. But the ones that do are still pretty comprehensive in terms of opencv feature coverage (at least compared to the demo they built):

Canny w/ webcam: https://ucisysarch.github.io/opencvjs/examples/live/img_proc...

Colors, canny, blurs, contours, histogram, morphology: http://ucisysarch.github.io/opencvjs/examples/img_proc.html

Detect face/eyes: http://ucisysarch.github.io/opencvjs/examples/face_detect.ht...

And much more from: https://github.com/ucisysarch/opencvjs/tree/gh-pages/example....