Flex伸缩盒模型实现三列布局

博客

伸缩盒模型key:flex属性。flex属性是CSS3中新增的属性，不支持IE8及以下，所以如果要兼容低版本的浏览器须用float和margin传统的布局方式
实现效果1：两边固定宽度的侧栏悬浮在两侧，中间自适应宽度

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<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <title></title>
    <style type="text/css" media="screen">
        *{
            margin: 0;
            padding: 0;
            font-family: "微软雅黑";
        }
        .container{
            width: 100%;
            display: flex;
        }
        .aside{
            flex-basis: 200px;
            height: 500px;
            background: green;

        }
        .main{
            flex: 1;
            height: 500px;
            background: blue;
        }
    </style>
</head>
<body>
    <div class="container">
        <aside class="aside">aside_left</aside>
        <main class="main">main</main>
        <aside class="aside">aside_right</aside>
    </div>
</body>
</html>

实现效果2：两边宽度自适应的侧栏悬浮在两侧，中间自适应宽度

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<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <title></title>
    <style type="text/css" media="screen">
        *{
            margin: 0;
            padding: 0;
            font-family: "微软雅黑";
        }
        .container{
            width: 100%;
            display: flex;
        }
        .aside{
            flex: 1;
            height: 500px;
            background: green;

        }
        .main{
            flex: 5;
            height: 500px;
            background: blue;
        }
    </style>
</head>
<body>
    <div class="container">
        <aside class="aside">aside_left</aside>
        <main class="main">main</main>
        <aside class="aside">aside_right</aside>
    </div>
</body>
</html>