Bootstrap学习js插件篇之滚动监听_html/css_WEB-ITnose-html教程-PHP中文网

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用法

通过data属性

通过为需要监听的页面元素（一般是

）添加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。

<body data-spy="scroll" data-target=".navbar-example"> ... <div class="navbar-example"> <ul class="nav nav-tabs"> ... </ul> </div> ... </body>

通过JavaScript

通过JavaScript启动滚动监听：

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

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。例如，home必须对应DOM中例如

。

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：

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

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=""。

名称类型默认值描述

offset

number

Pixels to offset from top when calculating position of scroll.

事件

事件类型描述

activate.bs.scrollspy

当滚动监听插件将某个元素置为active时，此事件被触发。

$('#myScrollspy').on('activate.bs.scrollspy', function () { // do something… })

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