code: function getPointer(_ref2, endOnly) {
    var pageX = _ref2.pageX,
        pageY = _ref2.pageY;
    var end = {
      endX: pageX,
      endY: pageY
    };
    return endOnly ? end : assign({
      startX: pageX,
      startY: pageY
    }, end);
  }
docs: Get a pointer from an event object.
  @param {Object} event - The target event object.
  @param {boolean} endOnly - Indicates if only returns the end point coordinate or not.
  @returns {Object} The result pointer contains start and/or end point coordinates.