SOURCE

console 命令行工具 X clear

                    
>
console
<div class="container">
    <div class="element">111111</div>
</div>
.container{
    height:300px;
    width:300px;
    background:blueviolet;
}
.element{
    width:100px;
    background:red;
    line-height:50px;
}