var canvas = document.getElementById('mycanvas'); ctx = canvas.getContext('2d');
It is everywhere on the internet, stimulated by our browsers and interacting with internet content . For us designers and cartoonists, this means that we can offer editable and interactive content to a reader through his electronic terminal (smartphone, laptop, etc.). Because JS can take into account the input datas, constantly follow the position of your mouse or finger on the screen, even the orientation and the movement of your smartphone... Amazing!
In short, it is a good technique to bring the drawings to life in interaction with the person handling it. And this can give us very surprising results.