我的 bootstrap scrollspy 怎么了？

Question

我只想尝试 Bootstrap Navbar 的 scrollspy，但它不起作用。无论我单击哪个菜单，<li><a href="section4"></li> 项始终处于活动状态。如果我删除 body 中的 date-spy="scroll" data-target="#myNavbar" 和底部的脚本，li active 就可以了。

    <head><meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
    <!--<link rel="stylesheet" type="text/css" href="css/bootstrap-theme.min.css">-->
    <link rel="stylesheet" type="text/css" href="css/style.css">


    <script src="js/jquery-1.12.3.min.js"></script>
    <script src="js/bootstrap.min.js"></script>
    <script src="js/script.js?rand=<?php echo rand(); ?>"></script>
</head>
<body data-spy="scroll" data-target="#myNavbar">
    <nav class="navbar navbar-inverse navbar-fixed-top">
        <div class="container-fluid">
            <div class="navbar-header">
                <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>                        
                </button>
                <a class="navbar-brand" href="#">TEST</a>
            </div>
            <div>
                <div class="collapse navbar-collapse" id="myNavbar">
                    <ul class="nav navbar-nav">
                        <li><a href="#section1">Section 1</a></li>
                        <li><a href="#section2">Section 2</a></li>
                        <li><a href="#section3">Section 3</a></li>
                        <li><a href="#section4">Section 4</a></li>
                    </ul>
                </div>
            </div>
        </div>
    </nav>

    <div id="section1" class="container-fluid">
        <h1>Section 1</h1>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
    </div>
    <div id="section2" class="container-fluid">
        <h1>Section 2</h1>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
    </div>
    <div id="section3" class="container-fluid">
        <h1>Section 3</h1>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
    </div>
    <div id="section4" class="container-fluid">
        <h1>Section 4</h1>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
        <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
    </div>

    <script>
        $('body').scrollspy({
            target: '#myNavbar',
            offset: 50
        });
    </script>
</body>

Answer 1

您需要将 jQuery 包装在文档就绪包装器中

$(document).ready(function(){
        $('body').scrollspy({
            target: '#myNavbar',
            offset: 50
        });
})

我还在其他文档中发现了这一点，您的 CSS:

中可能没有

需要相对定位：data-spy="scroll"的元素需要CSS位置属性，取值为"relative"正常工作。

Answer 2

我不知道为什么，html文件需要在文件顶部添加<!DOCTYPE html>。并且 scrollspy 有效。

我的 bootstrap scrollspy 怎么了？

What's up with my bootstrap scrollspy?

jquery

scrollspy