Detect touchmove on circle in svg element

I recommend InteractJS to handle touch events. It doesn't have any dependencies and handles dragging, rotation and multitouch etc.

interact('.drag-and-resize').draggable({
   snap: {
   targets: [
    { x: 100, y: 200 },
    function (x, y) { return { x: x % 20, y: y }; }
   ]}
}).resizable({
    inertia: true
});

Here is a demo I cobbled together on Codepen using SVGs