console 命令行工具 X clear

console

<div id="wrap">
<div class="center"></div>
<div class="left"></div>
<div class="right"></div>
</div>

#wrap{
    display: flex;
    flex: 1;
}

.center{
    flex: 1;
    background: pink;
    min-height: 400px;
}

.left, .right{
    flex: 0 0 12em;
    background: gray;
}

.left{
    order:-1;
}