1.幾種常用的清除浮動(dòng)方法

<style type="text/css"> 
   .div1{background:#000080;border:1px solid red;}
   .div2{background:#800080;border:1px solid red;height:100px;margin-top:10px}
   
   .left{float:left;width:20%;height:200px;background:#DDD}
   .right{float:right;width:30%;height:80px;background:#DDD}
   
   /*清除浮動(dòng)代碼*/
   .clearfloat:after{display:block;clear:both;content:"";visibility:hidden;height:0}
   .clearfloat{zoom:1}
   </style> 
<div class="div1 clearfloat"> 
<div class="left">Left</div> 
<div class="right">Right</div> 
</div>
<div class="div2">
   div2
   </div>

2.自動(dòng)截取文字，css實(shí)現(xiàn)文字超出顯示省略匯總

單行：
     text-overflow: ellipsis;
     white-space: nowrap;/*禁止自動(dòng)換行*/
     overflow: hidden;
雙行：
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;  // 控制多行的行數(shù)
    -webkit-box-orient: vertical;