磁性吸附 目录 代码实例 与限定范围拖拽的差异 下载源码链接 代码实例 * { padding: 0; margin: 0; } #box1 { width: 500px; height: 500px; background: #999; position: relative; left: 100px; top: 100px; } #box { width: 100px; height: 100px; background: #334; position: absolute; cursor: move; } <div