在 https://wanglin2.GitHub.io/mind-map/ 的在线试用页面上，小地图在拖动移动时会丢失响应

After analysis, the mousemove event is bound to windowBox, but the size of windowBox will change. When the mouse is dragged too quickly and moves out of the windowBox, the movement of the mini map is invalid. It is recommended to dynamically add the mousemove event to the window in the mousedown event.