尝试了解 Javascript 和 HTML5 的工作原理。我有一个导航，当您按第一部分时，我会尝试显示内容 1，当您按第二部分时……等等。我尝试了一些方法，我显然没有正确理解 .next，但我只能让它显示第一个元素，但是当我按第二部分时，内容二不显示。我想我想象它是错误的，而不是 .first()，.next 对我来说很有意义，因为我觉得这只会得到下一个元素。无论如何，这是一些代码，提前致谢。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Assignment 6 | jQuery Usability </title>
<link rel="stylesheet" href="stylesheet.css">
<!-- This matches the CSS width to the device width, and prevents forced overview without disabling zooming -->
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Helpful for older Blackberries -->
<meta name="HandheldFriendly" content="True">
<!-- Helpful for older IE mobile -->
<meta name="MobileOptimized" content="320">
<!-- Apple iOS-specific -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<!-- enforce CSS3 media queries in IE 8 and older -->
<!--[if lt IE 9]>
<script src="http://css3-mediaqueries-js.googlecode.com/svn/trunk/css3-mediaqueries.js"></script>
<![endif]-->
<!-- Note: this won't work when testing locally; you'll need to upload your files to a server to test it in IE -->
<!-- HTML5shiv, for IE 6, 7 and 8 -->
<!--[if lte IE 9]>
<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js" type="text/javascript"></script>
<![endif]-->
<!-- jQuery -->
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script>
$(document).ready(function() {
$('ul').hide();
$('a.btnDown').click(function() {
$('nav>ul').fadeIn(200);
}); //closes a.btnDown
$('a.contentDown').click(function() {
$('body>aside>ul').first().fadeIn(200);
}); //closes contentDown
}); //closes .ready()
</script>
</head>
<body>
<nav>
<h1><a class="btnDown" href="#"> Main Menu </a></h1>
<ul>
<li><a class="contentDown" href="#"> Part One </a></li>
<li><a class="contentDown" href="#"> Part Two </a></li>
<li><a class="contentDown" href="#"> Part Three </a></li>
<li><a class="contentDown" href="#"> Student Notes 1 </a></li>
<li><a class="contentDown" href="#"> Student Notes 2 </a></li>
<li><a class="contentDown" href="#"> Student Notes 3</a></li>
</ul>
</nav>
<aside>
<ul>
<li> Content 1 </li>
</ul>
<ul>
<li> Content 2 </li>
</ul>
<ul>
<li> Content 3 </li>
</ul>
<ul>
<li> Content 4 </li>
</ul>
<ul>
<li> Content 5 </li>
</ul>
<ul>
<li> Content 6 </li>
</ul>
</aside>
<figure>
<!-- PUT TV IMAGE HERE -->
</figure>
</body>
</html>
最佳答案
对于给定的标记，最简单的解决方案是使用元素的索引，如下所示
$(document).ready(function () {
$('ul').hide();
$('a.btnDown').click(function () {
$('nav>ul').fadeIn(200);
return false;
}); //closes a.btnDown
//all the content elements
var $suls = $('body>aside>ul');
var $as = $('a.contentDown').click(function () {
//hide visible content item
$suls.filter(':visible').hide();
//display the content item in the same position as the clicked contentDown
$suls.eq($as.index(this)).fadeIn(200);
}); //closes contentDown
}); //closes .ready()
演示:Fiddle
关于javascript - 调用 ul 中下一个元素的函数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22256703/