三栏布局实现

草莓千层蛋糕
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五种方式：

float 布局：

image.png

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .output {
            width: 100%;
            height: 300px;
            min-width: 600px;
        }

        .side {
            height: 300px;
            width: 300px;
            background-color: orange;
        }

        .side-left {
            float: left;
        }

        .side-right {
            float: right;
        }

        .mid {
            float: left;
            /* width: calc(100%-600px); */
            width: calc(100% - 600px);
            height: 300px;
            background-color: skyblue;
        }
    </style>
</head>

<body>
    <!-- calc() 函数用于动态计算长度值。
    需要注意的是，运算符前后都需要保留一个空格，例如：width: calc(100% - 10px)； -->
    
    <div class="output">
        <div class="side side-left"></div>
        <!-- <div class=" mid"></div> -->
        <div class="side side-right"></div>
        <div class="mid"></div>
    </div>

    <script>

    </script>

</body>

</html>

position 布局：

<!DOCTYPE html>
<html lang="en">

<head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <title>Document</title>
   <style>
       .output {
           width: 100%;
           height: 300px;
           position: relative;
       }

       .inner {
           width: 300px;
           height: 300px;
           background-color: orange;
           position: absolute;
       }

       .left {
           left: 0;
       }

       .right {
           right: 0;
       }

       .mid {
           /* left: 300px;
           width: calc(100% - 600px); */

           /* 兼容性最好的写法： */
           left: 300px;
           right: 300px;
           height: 300px;
           position: absolute;
           background-color: lightblue;
       }
   </style>
</head>

<body>
   <div class="output">
       <div class="inner left"></div>
       <div class="mid"></div>
       <div class="inner right"></div>
   </div>


   <script>

   </script>

</body>

</html>

table布局：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .outer{
            display: table;
        }
        .inner{
            width: 300px;
            height: 300px;
            background-color:orange;
        }
        .mid{
            display: table-cell;
            background-color:lightblue;
            /* 继承父类的剩余部分 */
            width: 100%;
        }
    </style>
</head>
<body>



    <div class="outer">
        <div class="inner left"></div>
        <div class="inner mid"></div>
        <div class="inner right"></div>
    </div>


    <script>
        
    </script>

</body>
</html>

flex布局：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .outer{
            display: flex;
        }
        .inner{
            width: 300px;
            height: 300px;
            background-color: orchid;
        }
        .mid{
            /* flex: 1; */
            flex: auto;
            background-color: lightblue;
        }
        
    </style>
</head>
<body>
    <div class="outer">
        <div class="inner left"></div>
        <div class="inner mid"></div>
        <div class="inner right"></div>
    </div>
    <script>
        
    </script>

</body>
</html>

grid布局：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
      .outer{
          display: grid;
          grid-template-rows: 300px;
          grid-template-columns:300px auto 300px;
          /* grid-template-columns属性定义每一列的列宽，grid-template-rows属性定义每一行的行高。 */
      }
      .inner{
        background-color: orange;
      }
      .mid{
          background-color: lightgoldenrodyellow;
      }
    </style>
</head>
<body>



    <div class="outer">
        <div class="inner left"></div>
        <div class="inner mid"></div>
        <div class="inner right"></div>
    </div>


    <script>
        
    </script>

</body>
</html>
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