css中sticky属性 - 成长小破站

sticky粘性定位
是css新增属性
其实就是以往我们做的fixed;当滚动条下拉到一定程度设置容器为fixed；
用图来演示：

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常见场景：通讯录及头部工具条

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Document</title>
        <style type="text/css" media="screen">
        html{background:#f5f5f5;}
        body{min-height: 1280px;max-width: 640px;margin:0 auto;background:#fff;}
        *{margin:0;padding:0;}
            .nav{color: #fff;font-size: 24pt;padding:0 10px; position: sticky; top: 0px;height: 50px;background: #067;}
                p{line-height: 2; }
        </style>
    </head>
    <body>
    <nav class="nav">A</nav>
    <p>Keeps elements positioned as "fixed" or "relative" depending on how it appears in the viewport. As a result the element is "stuck" when necessary while scrolling.</p>
<nav class="nav" style="background:#0f9">B</nav>
<p>Keeps elements positioned as "fixed" or "relative" depending on how it appears in the viewport. As a result the element is "stuck" when necessary while scrolling.</p>
<nav class="nav" style="background:#f90">C</nav>
<p>Keeps elements positioned as "fixed" or "relative" depending on how it appears in the viewport. As a result the element is "stuck" when necessary while scrolling.</p>
<nav class="nav" style="background:#09f">D</nav>
<p>Keeps elements positioned as "fixed" or "relative" depending on how it appears in the viewport. As a result the element is "stuck" when necessary while scrolling.</p>
</body>
</html>

兼容情况

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