向下滚动时缩小导航栏(bootstrap3) [英] Shrinking navigation bar when scrolling down (bootstrap3)

问题描述

我想在 http://dootrix.com/ 上建立一个导航栏效果我的页面(向下滚动栏变小并且徽标更改后).我为我的页面使用了引导程序 3.有没有一种简单的方法可以用 bootstrap 来实现它?

解决方案

粘性导航栏:

要制作粘性导航，您需要将 navbar-fixed-top 类添加到您的导航

官方文档:
https://getbootstrap.com/docs/5.0/components/navbar/#placement

官方示例:
http://getbootstrap.com/examples/navbar-fixed-top/

一个简单的示例代码:

<div class="container">...

</nav>

与相关的jsfiddle:http://jsfiddle.net/ur7t8/

调整导航栏的大小:

如果您希望在滚动页面时调整导航栏的大小，您可以查看以下示例:http://www.bootply.com/109943

JS

$(window).scroll(function() {如果 ($(document).scrollTop() > 50) {$('nav').addClass('shrink');} 别的 {$('nav').removeClass('shrink');}});

CSS

nav.navbar.shrink {最小高度:35px；}

动画:

要在滚动时添加动画，您只需在导航上设置过渡

CSS

nav.navbar{背景颜色:#ccc;//动画片-webkit-transition:所有 0.4 秒轻松；过渡:全0.4s缓动；}

---

我用完整的示例代码制作了一个 jsfiddle:http://jsfiddle.net/Filo/m7yww8oa/

I would like to build a navigation-bar effect like it is on http://dootrix.com/ on my page (after scrolling down the bar getting smaller and the logo changes). Im using bootstrap 3 for my page. Is there an easy way to realize it with bootstrap?

解决方案

Sticky navbar:

To make a sticky nav you need to add the class navbar-fixed-top to your nav

Official documentation:
https://getbootstrap.com/docs/5.0/components/navbar/#placement

Official example:
http://getbootstrap.com/examples/navbar-fixed-top/

A simple example code:

<nav class="navbar navbar-default navbar-fixed-top" role="navigation">
  <div class="container">
    ...
  </div>
</nav>

with related jsfiddle: http://jsfiddle.net/ur7t8/

Resize the navbar:

If you want the nav bar to resize while you scroll the page you can give a look to this example: http://www.bootply.com/109943

JS

$(window).scroll(function() {
  if ($(document).scrollTop() > 50) {
    $('nav').addClass('shrink');
  } else {
    $('nav').removeClass('shrink');
  }
});

CSS

nav.navbar.shrink {
  min-height: 35px;
}

Animation:

To add an animation while you scroll, all you need to do is set a transition on the nav

CSS

nav.navbar{
  background-color:#ccc;
   // Animation
   -webkit-transition: all 0.4s ease;
   transition: all 0.4s ease;
}

---

I made a jsfiddle with the full example code: http://jsfiddle.net/Filo/m7yww8oa/

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