flex弹性盒布局最后一行左对齐的实现思路

<div class="box">
	<ul>
		<li></li>
		<li></li>
		<li></li>
		<li></li>
		<li></li>
		<li></li>
		<li></li>
		<li></li>
	</ul>
</div>

ul{
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
}
ul:after{
	content: "";
	width: 32%;
}
ul li{
	width: 32%;
	height: 10vh;
	margin-bottom: 1vh;
	background: #2fbaff;
}