父级div高度不固定有两个子div,上下布局,下边的高度100px固定在底部,上边子div高度自适应怎么搞呢
<div class="box-main"> <div class="top-box"></div> <div class="bottom-box"></div> </div> .box-main{ display:flex; flex-direction: column; .top-box{ flex: 1; } .bottom-box{ flex: 0 0 100px; } }
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