1、添加几个空item(用于大多数场景)
根据布局列数添加空item,比如每行最大n列,那么在最后添加n个空item即可
<html><style>.item {width: 32%;background-color: #00abff;height: 60px;margin-top: 10px;}.itemempty {height: 0px;width: 32%;}.box {display: flex;justify-content: space-between;flex-wrap: wrap;}</style><body><div class="box"><div class="item"></div><div class="item"></div><div class="item"></div><div class="item"></div><div class="item"></div><div class="item"></div><div class="item"></div><div class="item"></div><div class="itemempty"></div><div class="itemempty"></div><div class="itemempty"></div></div></body></html>
2.利于after(适用于每行列数确定的场景)
.box:after {content: "";flex: auto;}