static _Pos(e) {
      if (e.targetTouches && e.targetTouches.length >= 1) {
        return { x: e.targetTouches[0].clientX, y: e.targetTouches[0].clientY };
      }
      // mouse event
      return { x: e.clientX, y: e.clientY };
    }
Get x position of mouse or touch event
@param {Event} e
@return {Point} x and y location