PaintOnMap.js not working on mobile?

Question

JavaScript

Hi friends!
I connected this plugin to the map to draw the area https://tech.yandex.ru/maps/jsbox/2.1/polygon_custom
but it does not want to draw on the mobile. Changed the onmousemove event to ontouchmove, still doesn't help.

...
canvas.onmousemove = function (e) {
            coordinates.push([e.offsetX, e.offsetY]);

            ctx2d.clearRect(0, 0, canvas.width, canvas.height);
            ctx2d.beginPath();

            ctx2d.moveTo(coordinates[0][0], coordinates[0][1]);
            for (var i = 1; i < coordinates.length; i++) {
                ctx2d.lineTo(coordinates[i][0], coordinates[i][1]);
            }

            ctx2d.stroke();
        }.bind(this);
...

Tell me my hands are crooked or the plugin cannot be adapted to the mob?