Opencv.js is opencv libray to translate to javascript . You can use it in javascript to do some funny thins Also you can use it to explore function of opencv as quick and easy as you can . what you need is a browser such as Chrome .
todo: import core function of opencv !
Adapted to work with the getUserMedia API using code from github.com/wesbos/HTML5-Face-Detection
Try out the demo using Google Chrome with the "MediaStream" flag enabled in about:flags
Note that this demo only works online (or localhost) due to security restrictions. It won't work on a local file:/// system!