我有一个带有嵌套UL的导航栏,如下所示。我使用一个简单的类并切换它来隐藏菜单/子菜单:
nav ul ul {
display: none;
}
.showIt {
display: block;
}
单击"#"的href链接我试图隐藏所有其他UL,除了包含所点击项目的那些,使用:
$("nav").on('click', "a[href='#']", function () {
var $thisUl = $(this).next('ul');
$('nav ul').not($thisUl).each(function () {
if (!($.contains($(this), $thisUl)))
$(this).removeClass('showIt');
});
$thisUl.toggleClass("showIt");
});
由于某些原因,它不起作用,因为它没有扩展点击的子菜单。实际上,它会折叠包含此子菜单的菜单。
这里是导航结构供参考:
<nav>
<ul class="navbar">
<li>
<a href="index.html">Home</a>
</li>
<li>
<a href="newsletter.html">News/Hints & Tips</a>
</li>
<li>
<a href="#">Courses</a>
<ul>
<li>
<a href="#">IT Courses</a>
<ul>
<li><a href="courses/access-main.html">Access</a></li>
<li><a href="courses/excel-main.html">Excel</a></li>
<li><a href="courses/onenote-main.html">OneNote</a></li>
<li><a href="courses/outlook-main.html">Outlook</a></li>
</ul>
</li>
<li>
<a href="#">Microsoft Certified</a>
<ul>
<li><a href="ms-certified-courses/mos-main.html">Microsoft Office Specialist(MOS)</a></li>
<li><a href="ms-certified-courses/mosexpert-main.html">Microsoft Office Specialist(MOS) Expert</a></li>
<li><a href="ms-certified-courses/mosmaster-main.html">Microsoft Office Specialist(MOS) Master</a></li>
</ul>
</li>
<li><a href="http://external_link.co.uk" target="_blank">PD Courses</a></li>
</ul>
</li>
<li>
<a href="#">Materials</a>
<ul>
<li><a href="courseware.html">Course Materials</a></li>
<li><a href="materials/latest.html">Latest Downloads</a></li>
<li><a href="materials/access.html">Access</a></li>
<li><a href="materials/excel.html">Excel</a></li>
</ul>
</li>
<li>
<a href="testimonials.html">Testimonials</a>
</li>
<li><a href="ourteam.html">Our Team</a></li>
<li><a href="contactus.html">Contact Us</a></li>
</ul>
</nav>
如何折叠(删除所有类别)除当前UL以外的所有UL及其父UL。
答案 0 :(得分:1)
contains()
需要dom元素
只需更改
if (!($.contains($(this), $thisUl)))
到
if (!($(this)[0].contains($thisUl[0])))
(Demo)
这是未来观众的香草javascript解决方案。
(function () {
"use strict";
document.querySelector('nav').onclick = function (e) {
if (e.target.getAttribute('href') == '#') {
var thisUl = e.target.nextElementSibling;
var lists = document.querySelectorAll('nav ul.showIt'),
list;
for (var i = 0; list = lists[i]; i++) {
if (!list.isSameNode(thisUl) && !list.contains(thisUl)) list.className = list.className.replace(' showIt', '');
}
thisUl.className += ' showIt';
}
};
})();
(Demo)