Question

我希望替换父（ul）元素的子元素（li.filetabs）的类名。我所做的似乎很正确，但显然不是因为班级没有被替换。

UPDATED WITH JSFIDDLE 注意Jsfiddle：当你点击一次，一切正常，再次点击相同的导航标签，你会看到下拉消失并重新出现......

var aFileTabs = $('.filetabs');
var curTab = $(this);
// this seems to give correct output 
var prevCurTab = $('.cTabActive').parent(); //(i.e. *jQuery(li.filetabs)*  )
// the following line is the problem line; Ive tried replacing the children with
// $('ul',prevCurTab)... but that doesnt work either... I must be doing something
// very basic wrong
$(prevCurTab).children().removeClass('cTabActive').addClass('cPrevTabActive');
$('ul', curTab).addClass ('cTabActive');

编辑：道歉，我忘记了HTML，还有更多，所以只有前两个导航按钮html被显示才能获得意义。

    <div id="filemenu">                     <!-- right tabs menu -->
        <ul id="fm_ul">
            <li class="filetabs">File
                <ul>
                    <li class="m_items"><a href="#"><span class="aHeading">New</span><span class="shortcutK">Ctrl-U</span></a></li>
                    <li class="m_items"><a href="#"><span class="aHeading">Open</span><span class="shortcutK">Ctrl-Z</span></a></li>
                    <li class="m_items"><a href="#"><span class="aHeading">Save</span><span class="shortcutK">Ctrl-T</span></a></li>
                    <li class="m_items"><a href="#"><span class="aHeading">Exit</span><span class="shortcutK">Ctrl-Q</span></a></li>
                </ul></li><li class="filetabs">Edit
<ul>
                    <li class="m_items"><a href="#"><span class="aHeading">Undo</span><span class="shortcutK">Ctrl-M</span></a></li>
                    <li class="m_items"><a href="#"><span class="aHeading">Redo</span><span class="shortcutK">Ctrl-S</span></a></li>
                    <li class="m_items"><a href="#"><span class="aHeading">Zoom In</span><span class="shortcutK">Ctrl-R</span></a></li>
                    <li class="m_items"><a href="#"><span class="aHeading">Zoom Out</span><span class="shortcutK">Ctrl-Q</span></a></li>

                </ul></li>

Answer 1

我根本不确定这一点，但请尝试：

$('.filetabs').on('click', function() {
    var aFileTabs = $('.filetabs'),
        curTab = $(this),
        prevCurTab = $('.cTabActive').parent();

    $('.cTabActive').removeClass('cTabActive').addClass('cPrevTabActive');
    $('ul', curTab).removeClass('cPrevTabActive').addClass ('cTabActive');
});

FIDDLE

Answer 2

在这篇单独的帖子中回答。谢谢丹尼尔。

Jquery - manipulating classes in a simple dropdown menu

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2 个答案: