console 命令行工具 X clear

console

<div class="p-box">
	<div class="s-box"></div>
</div>

.p-box {
    width: 300px;
    height: 300px;
    background-color: green;
    overflow: hidden;
}

.s-box {
    width: 100px;
    height: 100px;
    background-color: cornflowerblue;
    margin: 20px;
}