nav

作者: xueyueshuai | 来源:发表于2023-07-04 16:35 被阅读0次

自定义导航
css实现二级nav 三级nav 实例
Swfit--取消导航栏自带一条线
CSS规范 - 最佳实践
常用的网址
NAV
iOS开发根视图控制器启动问题
导航元素与导航栏
css html样式快捷方式
hover技巧：可以给两个span分开hover事件

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
<style>
    * {
        padding: 0;
        margin: 0;
    }
    .nav {
        position: fixed;
        left: 0;
        top: 0;
        right: 0;
        transition: all .3s;
        line-height: 100px;
    }
    .nav .container {
        width: 1100px;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
    }
    .nav .container .left {
        font-size: 2em;
        color: #FFDE00;
    }
    .nav .container .left:hover {
        color: #fec503
    }
    .nav .container .menu{
        display: flex;
        color: #fff;
    }

    .nav .container .menu-item{
        margin-left: 50px;
    }

    .nav.active {
        line-height: 50px;
        background-color: #fff;
        height: 50px;
        border-bottom: 2px solid #FFDE00;
    }

    .nav.active .container .menu{
        display: flex;
        line-height:50px;
        color: #000;
    }


</style>

<div class="nav">
    <div class="container">
        <div class="left">网站名称</div>
        <div class="menu">
            <div class="menu-item">首页</div>
            <div class="menu-item">产品</div>
            <div class="menu-item">新闻</div>
            <div class="menu-item">关于我们</div>
        </div>
    </div>
</div>

<div style="background-color: blanchedalmond;height: 3100px">
    <img src="http://project-all.oss-cn-beijing.aliyuncs.com/jianzhan/20230422/173046_978776.jpg" style="width: 100%">
</div>

<script>
  let cbpAnimatedHeader = function () {
    let docElem = document.documentElement;
    let header = document.querySelector('.nav');
    let didScroll = false;
    let changeHeaderOn = 150;

    function init() {
      window.addEventListener('scroll', function (event) {
        if (!didScroll) {
          didScroll = true;
          setTimeout(scrollPage, 250);
        }
      }, false);
    }

    init();


    function scrollPage() {
      let sy = window.pageYOffset || docElem.scrollTop;
      if (sy >= changeHeaderOn) {
        header.classList.add('active')
      } else {
        header.classList.remove('active')
      }
      didScroll = false;
    }

  }
  cbpAnimatedHeader()
</script>

</body>
</html>