console 命令行工具 X clear

console

<div class="test0"></div>
<div class="test1"></div>

.test0{
    width: 10px;
    height: 10px;
    position: fixed;
    top: 0;
    left: 0;
    background: yellow;
}
.test1{
    width: 100px;
    height: 100px;
    position: fixed;
    top: 0;
    left:0;
    z-index: 100;
    background: red;
}