zao
可以用calc来计算，这样代码少一点 .parent { border: 1px solid; width: 1000px; height: 1000px; } .child { position: relative; border: 1px solid; width: 100px; height: 100px; top: calc(50% - 50px); left: calc(50% - 50px);...
the same issue
 I use re-resizable and dnd-kit to get the effect you want