HTML+CSS - 侧边导航栏

时间：2025-03-31 08:17:45
<body>
   <div class="navbar">
       <input type="checkbox" name="" >
       <!--复选框的id属性值和label元素的for属性值必须是相同的,才能够通过点击label选中复选框-->
       <label for="checkbox">
          <i class="fa fa-bars"></i>
        </label>
       <ul>
          <li>
            <img src="./img/" alt="">
            <span>欢迎您！管理员</span>
          </li>
          <li>
            <a href="#">
                <i class="fa fa-home"></i>
                <span>后台首页</span>
            </a>
          </li>
          <li>
            <a href="#">
                <i class="fa fa-sitemap"></i>
                <span>商品列表</span>
            </a>
          </li>
          <li>
            <a href="#">
                <i class="fa fa-user"></i>
                <span>用户列表</span>
            </a>
          </li>
          <li>
            <a href="#">
                <i class="fa fa-shopping-cart"></i>
                <span>订单列表</span>
            </a>
          </li>
          <li>
            <a href="#">
                <i class="fa fa-windows"></i>
                <span>功能列表</span>
            </a>
          </li>
       </ul>
   </div>
</body>
/*页面初始化清除元素原有的内外边距*/
*{
    margin: 0;
    padding: 0;
}
body{
   overflow: hidden;
} 
.navbar{
    position: relative;
    width: 100%;
}
.navbar input{
    display: none;
}
.navbar label{
    position: absolute;
    top: 0;
    left: 70px;
    /*宽度占浏览器可视区域的宽度*/
    width: 100%;
    height: 43px;
    padding-left: 20px;
    font-size: 30px;
    color: #5a738e;
    background-color: #ededed;
    border: 1px solid #d9dee4;
    cursor: pointer;
    transition: 0.5s;
}
.navbar ul{
    overflow: hidden;
    list-style: none;
    width: 70px;
    /*高度占浏览器可视区域的高度*/
    height: 100vh;
    background-color: #2a3f54;
    transition: 0.5s;
}
.navbar ul li{
    height: 70px;
    margin-bottom: 10px;
}
.navbar ul li:first-child{
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px 0;
}
.navbar ul li:first-child img{
    width: 50px;
    border-radius: 50%;
}
.navbar ul li:first-child span{
    color: #fff;
    white-space: nowrap;
    display: none;
}
.navbar ul li a{
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    color: #d1d1d1;
    text-decoration: none;
    width: 100%;
    height: 100%;
}
.navbar ul li a i{
    font-size: 25px;
    margin-bottom: 10px;
}
.navbar ul li a span{
    font-size: 10px;
    white-space: nowrap;
}
.navbar ul li a:hover{
    color: #fff;
    background-color: #35495d;
}
/*: checked选择器判断复选框是否被选中*Ⅰ
/*+是相邻兄弟选择器找到了input的下一个兄弟label */
.navbar input:checked + label{
    left: 200px;
}
/* ~也是兄弟选择器但是可以找到隔了几代的兄弟*/
.navbar input:checked ~ ul{
    width: 200px;
}
.navbar input:checked ~ ul li:first-child{
    justify-content: flex-start;
}
.navbar input:checked ~ ul li:first-child span{
    margin-left: 14px;
    display: block;
}
.navbar input:checked ~ ul li a{
    flex-direction: row;
    justify-content: center;
}
.navbar input:checked ~ ul li a i{
    font-size: 18px;
    margin: 0 15px;
}
.navbar input:checked ~ ul li a span{
    font-size: 13px;
}

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