Navbar向下滚动消失，向上滚动再次出现w / slide

时间：2015-10-05 03:18:03

标签： javascript jquery html css twitter-bootstrap

我正在寻找像devmounta.in这样的导航栏。我有一个基本的工作，但它没有DevMountain的漂亮的滑动动画。我想在我的网站上添加漂亮的滑动动画。

HTML：

    <header>
    <nav class="navbar navbar-inverse navbar-fixed-top">
        <div class="container-fluid">
            <!-- Logo -->
            <div class="navbar-header">
                <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#mainNavBar">
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </button>
                <a href="#" class="navbar-brand">RoadAware</a>
            </div>
            <!-- Menu Items -->
            <div class="collapse navbar-collapse" id="mainNavBar">
                <ul class="nav navbar-nav navbar-right">
                    <li><a href="#">Home</a></li>
                    <li><a href="#">About</a></li>
                    <li><a href="#">Contact</a></li>
                    <li><a href="#">Contact</a></li>
                </ul>
            </div>
        </div>
    </nav>      
</header>

JS：

$(window).scroll(
{
    previousTop: 0
}, 
function () {
var currentTop = $(window).scrollTop();
if (currentTop < this.previousTop) {
    $("header").show();
} else {
    $("header").hide();
}
this.previousTop = currentTop;
});

2 个答案:

答案 0 :(得分：0)

使用.slideUp()代替.hide()和.slideDown()代替.show() 

$(window).scroll({
    previousTop: 0
},

function () {
    var currentTop = $(window).scrollTop();
    if (currentTop < this.previousTop) {
        $("header").slideUp();
    } else {
        $("header").slideDown();
    }
    this.previousTop = currentTop;
});

答案 1 :(得分：0)

您引用的网站使用名为Headroom.js的插件。见工作示例。

//HeadroomJS
var myElement = document.querySelector("header");
var headroom = new Headroom(myElement);
headroom.init();
body,
html {
  margin-top: 65px;
}
header .container {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  box-sizing: border-box;
  background-color: #fff;
  padding-left: 0;
  padding-top: 25px;
  padding-bottom: 5px
}
.headroom {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  transition: all .2s ease-in-out;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none
}
.headroom--pinned {
  top: 0
}
.headroom--unpinned {
  top: -40%
}
.notfound {
  font-family: proxima-nova;
  padding-top: 100px;
  min-width: 100%;
  min-height: 100%;
  background: rgba(0, 0, 0, .5)
}
.notfound h1 {
  margin-top: 8%;
  display: block;
  text-align: center;
  font-weight: 700;
  color: #fff
}
.notfound h5 {
  display: block;
  text-align: center;
  font-weight: 100;
  color: #fff
}
.notfound span {
  display: block;
  text-align: center;
  font-size: 700%;
  color: #00aeef;
  font-weight: 700;
  outline: #fff 1px
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/headroom/0.7.0/headroom.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet" />

<body>
  <header class="headroom">
    <nav class="navbar navbar-inverse">
      <div class="container-fluid">
        <!-- Logo -->
        <div class="navbar-header">
          <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#mainNavBar"> <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>

          </button> <a href="#" class="navbar-brand">RoadAware</a>

        </div>
        <!-- Menu Items -->
        <div class="collapse navbar-collapse" id="mainNavBar">
          <ul class="nav navbar-nav navbar-right">
            <li><a href="#">Home</a>

            </li>
            <li><a href="#">About</a>

            </li>
            <li><a href="#">Contact</a>

            </li>
            <li><a href="#">Contact</a>

            </li>
          </ul>
        </div>
      </div>
    </nav>
  </header>
  <div class="container">Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It
    has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop
    publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer
    took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset
    sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's
    standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.
    It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the
    printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries,
    but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker
    including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled
    it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages,
    and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since
    the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in
    the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting
    industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic
    typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem
    Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
    It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop
    publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer
    took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset
    sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's
    standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.
    It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</div>
</body>

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