Bootstrap教程JS插件滚动监听学习笔记分享

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这篇文章主要为大家分享了Bootstrap教程JS插件滚动监听学习笔记，内容很详细，感兴趣的小伙伴们可以参考一下

本文主要来学习一下JavaScript插件--滚动监听。

1、案例

滚动监听插件可以根据滚动条的位置自动更新所对应的导航标记。你可以试试滚动这个页面，看看左侧导航的变化。

先把实现的代码上了，你可以通过测试代码先来看看效果。

<!DOCTYPE html>

<html>

<head>

<title>Bootstrap</title>

<!--[if lt IE 9]>

</script>

</script>

<![endif]-->

{

height: 200px;

overflow: auto;

position: relative;

border:1px solid red;

}

</style>

</head>

<body>

<span class="sr-only">Toggle navigation</span>

</button>

<a class="navbar-brand" href="#">Project Name</a>

</div>

<a href="#" id="navbarDrop1" class="dropdown-toggle" data-toggle="dropdown">Dropdown

<li><a href="#three" tabindex="-1">three</a></li>

</ul>

</li>

</ul>

</div>

</nav>

<p>Ad leggings keytar, brunch id art party dolor labore. Pitchfork yr enim lo-fi before they sold

out qui. Tumblr farm-to-table bicycle rights whatever. Anim keffiyeh carles cardigan. Velit seitan

mcsweeney's photo booth 3 wolf moon irure. Cosby sweater lomo jean shorts, williamsburg hoodie

minim qui you probably haven't heard of them et cardigan trust fund culpa biodiesel wes anderson

aesthetic. Nihil tattooed accusamus, cred irony biodiesel keffiyeh artisan ullamco consequat.</p>

<p>Veniam marfa mustache skateboard, adipisicing fugiat velit pitchfork beard.

Freegan beard aliqua cupidatat mcsweeney's vero. Cupidatat four loko nisi, ea helvetica nulla carles.

Tattooed cosby sweater food truck, mcsweeney's quis non freegan vinyl. Lo-fi wes anderson +1

sartorial. Carles non aesthetic exercitation quis gentrify. Brooklyn adipisicing craft beer vice keytar

deserunt.</p> <h4 id="one">one</h4> <p>Occaecat commodo aliqua delectus.

Fap craft beer deserunt skateboard ea. Lomo bicycle rights adipisicing banh mi, velit ea sunt next

level locavore single-origin coffee in magna veniam. High life id vinyl, echo park consequat quis

aliquip banh mi pitchfork. Vero VHS est adipisicing. Consectetur nisi DIY minim messenger bag.

Cred ex in, sustainable delectus consectetur fanny pack iphone.</p>

<p>In incididunt echo park, officia deserunt mcsweeney's proident master cleanse thundercats

sapiente veniam. Excepteur VHS elit, proident shoreditch +1 biodiesel laborum craft beer. Single-origin

coffee wayfarers irure four loko, cupidatat terry richardson master cleanse. Assumenda you probably

haven't heard of them art party fanny pack, tattooed nulla cardigan tempor ad. Proident wolf nesciunt

sartorial keffiyeh eu banh mi sustainable. Elit wolf voluptate, lo-fi ea portland before they sold out four

loko. Locavore enim nostrud mlkshk brooklyn nesciunt.</p>

<h4 id="three">three</h4>

<p>Ad leggings keytar, brunch id art party dolor labore. Pitchfork yr enim lo-fi before they sold

out qui. Tumblr farm-to-table bicycle rights whatever. Anim keffiyeh carles cardigan. Velit seitan

mcsweeney's photo booth 3 wolf moon irure. Cosby sweater lomo jean shorts, williamsburg

hoodie minim qui you probably haven't heard of them et cardigan trust fund culpa biodiesel wes

anderson aesthetic. Nihil tattooed accusamus, cred irony biodiesel keffiyeh artisan ullamco consequat.</p>

<p>Keytar twee blog, culpa messenger bag marfa whatever delectus food truck. Sapiente

synth id assumenda. Locavore sed helvetica cliche irony, thundercats you probably haven't heard

of them consequat hoodie gluten-free lo-fi fap aliquip. Labore elit placeat before they sold out,

terry richardson proident brunch nesciunt quis cosby sweater pariatur keffiyeh ut helvetica artisan.

Cardigan craft beer seitan readymade velit. VHS chambray laboris tempor veniam. Anim mollit

minim commodo ullamco thundercats. </p>

</div>

</script>

</script>

</body>

</html>

用法1--通过data属性

通过为需要监听的页面元素（一般是）不过在上面添加在了Div上面，你可以自己看看代码就明白了。然后给div添加属性data-spy="scroll"就可很轻松的为顶部导航条添加滚动监听功能。然后为其添加data-target属性，此属性的值为任何Bootstrap中.nav组件的父元素的ID或class。

代码如下:

........

</div>

导航链接地址必须有对应的目标

导航条内的链接地址必须有对应的页面元素具有同样的ID值。

用法2--通过JavaScript

通过JavaScript启动滚动监听：

$('.scrollspy-example').scrollspy({ target:'#navbar-example' });

}) </script>

通过将样式类为scrollspy-example的div，去掉它的data-target属性。这样同样可以进行鼠标滚轮的切换。

2、方法

.scrollspy('refresh')

使用滚动监听插件时，每当页面中从DOM中增加或删除页面元素时，都需要调用此方法以，如下：

代码如下:

$('[data-spy="scroll"]').each(function () { var $spy = $(this).scrollspy('refresh') })

3、选项

可以将选项通过data属性或JavaScript传递。对于data属性，需要将选项名称放到data-之后，例如data-offset=""。

4、事件

alert(1);

}) </script>

最后注意:针对滚动监听的内容当然要添加滚动条，也就是要预先添加样式

{

height: 200px;

overflow: auto;

position: relative;

border:1px solid red;

}

</style>

给与Div内容一定的高度。

以上就是Bootstrap滚动监听相关内容的学习笔记，如果大家还想继续学习Bootstrap，可以点击这里，继续学习，希望对大家的学习有所帮助

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