如何在jQuery选项卡脚本中更改元素父元素的类？

Question

我使用本教程中的代码:jacklmoore.com/note/jquery-tabs。

<ul class='tabs'>
    <li><a href='#tab1'>Tab 1</a></li>
    <li><a href='#tab2'>Tab 2</a></li>
    <li><a href='#tab3'>Tab 3</a></li>
</ul>
<div id='tab1'>
    <p>Hi, this is the first tab.</p>
</div>
<div id='tab2'>
    <p>This is the 2nd tab.</p>
</div>
<div id='tab3'>
    <p>And this is the 3rd tab.</p>
</div>

脚本：

$('ul.tabs').each(function(){
    // For each set of tabs, we want to keep track of
    // which tab is active and it's associated content
    var $active, $content, $links = $(this).find('a');

    // If the location.hash matches one of the links, use that as the active tab.
    // If no match is found, use the first link as the initial active tab.
    $active = $($links.filter('[href="'+location.hash+'"]')[0] || $links[0]);
    $active.addClass('active');
    $content = $($active.attr('href'));

    // Hide the remaining content
    $links.not($active).each(function () {
        $($(this).attr('href')).hide();
    });

    // Bind the click event handler
    $(this).on('click', 'a', function(e){
        // Make the old tab inactive.
        $active.removeClass('active');
        $content.hide();

        // Update the variables with the new link and content
        $active = $(this);
        $content = $($(this).attr('href'));

        // Make the tab active.
        $active.addClass('active');
        $content.show();

        // Prevent the anchor's default click action
        e.preventDefault();
    });
});

我想修改这个脚本，以便在a的父li元素中添加/删除“active”类。我尝试用$active.parent('li').addClass('active');替换$active.addClass('active');，但结果代码的行为并不好。

Answer 1

您只需要从之前单击的元素中删除active类：

// Make the old tab inactive.
$active.parent('li').removeClass('active');

您还需要向第一个list元素添加active：

// If no match is found, use the first link as the initial active tab.
$active.parent('li').addClass('active');

Answer 2

有几个地方需要针对父li：

$('ul.tabs').each(function(){
    // For each set of tabs, we want to keep track of
    // which tab is active and it's associated content
    var $active, $content, $links = $(this).find('a');

    // If the location.hash matches one of the links, use that as the active tab.
    // If no match is found, use the first link as the initial active tab.
    $active = $($links.filter('[href="'+location.hash+'"]')[0] || $links[0]);
    $active.parent('li').addClass('active');
    $content = $($active.attr('href'));

    // Hide the remaining content
    $links.parent('li').not($active).each(function () {
        $($(this).attr('href')).hide();
    });

    // Bind the click event handler
    $(this).on('click', 'a', function(e){
        // Make the old tab inactive.
        $active.parent('li').removeClass('active');
        $content.hide();

        // Update the variables with the new link and content
        $active = $(this);
        $content = $($(this).attr('href'));

        // Make the tab active.
        $active.parent('li').addClass('active');
        $content.show();

        // Prevent the anchor's default click action
        e.preventDefault();
    });
});​

我拼凑了一个看起来可以工作的JSFiddle：

http://jsfiddle.net/5kGTX/