目录

三栏布局

一. 两边定宽中间自适应

1.flex布局

2.浮动 + margin

3.浮动 + calc()

4.定位

 5.表格布局

6.网格布局

7.圣杯布局

8.双飞翼布局

二. 中间定宽两边自适应

1.flex布局

2.浮动布局

3.margin负值

4.display:-webkit-box;

---

三栏布局

一. 两边定宽中间自适应

1.flex布局

<div class="container">
    <div class="left">left</div>
    <div class="center">center</div>
    <div class="right">right</div>
</div>
<style>
    div{
      height: 100px;
    }
    .container{
      display: flex; 
    }
    .center{
      flex: 1;
      background-color: blue;
    }
    .left,.right{
      width: 100px;
      background-color: red;
    }
</style>

2.浮动 + margin

  <div class="container">
    <div class="left">left</div>
    <div class="right">right</div>
    <div class="center">center</div>  <!-- 注意此时center在最后面--> 
  </div>
  <style>
    div{
      height: 100px;
    }
    .left{
      float: left;
      width: 100px;
      background-color: red;
    }
    .center{
      margin: 0 100px;
      background-color: blue;
    }
    .right{
      float: right;
      width: 100px;
      background-color: red;
    }
  </style>

3.浮动 + calc()

  <div class="container">
    <div class="left">left</div>
    <div class="center">center</div>
    <div class="right">right</div>
  </div>
  <style>
    div {
      height: 100px;
    }

    .left {
      float: left;
      width: 100px;
      background-color: red;
    }

    .center {
      float: left;
      width: calc(100% - 200px);
      background-color: blue;
    }

    .right {
      float: right;
      width: 100px;
      background-color: red;
    }
  </style>

4.定位

  <div class="container">
    <div class="left">left</div>
    <div class="center">center</div>
    <div class="right">right</div>
  </div>
  <style>
    div {
      height: 100px;
    }

    .container {
      position: relative;
    }

    .left {
      position: absolute;
      left: 0;
      width: 100px;
      background-color: red;
    }

    .center {
      position: absolute;
      left: 100px;
      width: calc(100% - 200px);
      background-color: blue;
    }

    .right {
      position: absolute;
      right: 0;
      width: 100px;
      background-color: red;
    }
  </style>

 5.表格布局

  <div class="container">
    <div class="left">left</div>
    <div class="center">center</div>
    <div class="right">right</div>
  </div>
  <style>
    div{
      height: 100px;
    }
    .container {
      display: table;
      width: 100%;
    }
    .container>div {
      display: table-cell;
    }
    .center{
      background-color: blue;
    }
    .left,.right{
      width: 100px;
      background-color: red;
    }
  </style>

6.网格布局

  <div class="container">
    <div class="left">left</div>
    <div class="center">center</div>
    <div class="right">right</div>
  </div>
  <style>
    div{
      height: 100px;
    }
    .container {
        display: grid;
        width: 100%;
        grid-template-columns: 100px auto 100px;
    }
    .left,.right{
      background-color: red;
    }
    .center{
      background-color: blue;
    }
  </style>

7.圣杯布局

  <div class="header">头部</div>
  <div class="container clearfix">
    <div class="center">主区域（优先加载）</div>
    <div class="left">左区域</div>
    <div class="right">右区域</div>
  </div>
  <div class="footer">底部</div>
  <style>
    .clearfix::after{
      content: "";
      display: block;
      clear: both;
    }
    div{
      height: 100px;
    }
    .header,.footer{
      background-color: yellow;
    }
    .container{
      padding: 0 100px;
    }
    .center,.left,.right{
      float: left;
    }
    .center{
      width: 100%;
      background-color: red;
    }
    .left{
      position: relative;
      left: -100px;
      margin-left: -100%;
      width: 100px;
      background-color: blue;
    }
    .right{
      position: relative;
      right: -100px;
      margin-left: -100px;
      width: 100px;
      background-color: green;
    }
    
  </style>

8.双飞翼布局

  <div class="header">头部</div>
  <div class="container clearfix">
    <div class="wrapper">
      <div class="center">主区域（优先加载）</div>
    </div>
    <div class="left">左区域</div>
    <div class="right">右区域</div>
  </div>
  <div class="footer">底部</div>
 <style>
    .clearfix::after {
      content: "";
      display: block;
      clear: both;
    }
    div {
      height: 100px;
    }
    .header,
    .footer {
      background-color: yellow;
    }
    .wrapper{
      width: 100%;
      float: left;
    }
    .center {
      margin: 0 100px;
      background-color: red;
    }
    .left {
      width: 100px;
      float: left;
      margin-left: -100%;
      background-color: blue;
    }
    .right {
      width: 100px;
      float: left;
      margin-left: -100px;
      background-color: green;
    }
  </style>

二. 中间定宽两边自适应

1.flex布局

<div class="container">
    <div class="left"></div>
    <div class="center"></div>
    <div class="right"></div>
</div>
<style>
    div{
       height: 100px;
    }
    .container{
      display: flex;
    }
    .left,right{
      flex: 1;
      background-color: red;
    }
    .center{
      width: 1250px;
      height: 500px;
      background-color: yellow;
    }
</style>

2.浮动布局

  <div class="container">
    <div class="left">left</div>
    <div class="center">center</div>
    <div class="right">right</div>
  </div>
  <style>
    div{
        height:100px
    }
    .center{
      float: left;
      width: 1250px;
      background-color: blue;
    }
    .left,.right{
      float: left;
      width: calc(50% - 625px);
      background-color: red;
    }
  </style>

3.margin负值

  <div class="container">
    <div class="left"></div>
    <div class="center"></div>
    <div class="right"></div>
  </div>
  <style>
   div{
     height: 100px;
   }
    .center {
      width: 1000px;
      float: left;
      background-color: yellow;
    }
    .left {
      float: left;
      width: 50%;
      margin-left: -500px;
      background-color: red;
    }
    .right {
      float: right;
      width: 50%;
      margin-right: -500px;
      background-color: blue;
    }
  </style>

4.display:-webkit-box;

  <div class="container ">
    <div class="left">left</div>
    <div class="center">center</div>
    <div class="right">right</div>
  </div>
  <style>
    div{
        height:100px
    }
    .container{
      display: -webkit-box;
    }
    .left,.right{
      -webkit-box-flex: 1;
      background-color: blue;
    }
    .center{
      width: 1250px;
      background-color: red;
    }
  </style>