Question

实现了一个早先的问题我问的并不是最清楚的问题，所以我试图简化它并添加更多细节因为我想我知道我需要做什么只是不要知道该怎么做。

我有一个多级菜单 - HTML

    <nav id="site-navigation" class="main-navigation" role="navigation">

<button class="menu-toggle" aria-controls="primary-menu" aria-expanded="false">Menu</button>            
<div class="partial-refreshable-nav-menu partial-refreshable-nav-menu-1 menu-all-pages-container">
<ul id="primary-menu" class="nav-menu" aria-expanded="false">
    <li id="1636" class="menu-item">
        <a href="http://wpthemetestdata.wordpress.com/">Home</a></li>
    <li id="1637" class="menu-item">
        <a href="http://localhost/frytest/blog/">Blog</a></li>
    <li id="1638" class="menu-item">
        <a href="http://localhost/frytest/front-page/">Front Page</a></li>
    <li id="1639" class="menu-item" aria-haspopup="true">
        <a href="http://localhost/frytest/about/">About The Tests</a>
        <button class="dropdown-toggle" aria-expanded="true">
            <span class="screen-reader-text">expand child menu</span>
        </button>
        <ul class="sub-menu">
            <li id="1697" class="menu-item">
            <a href="http://localhost/frytest/about/page-image-alignment/">Page Image Alignment</a></li>
            <li id="1698" class="menu-item">
            <a href="http://localhost/frytest/about/page-markup-and-formatting/">Page Markup And Formatting</a></li>
            <li id="1640" class="menu-item">
            <a href="http://localhost/frytest/about/clearing-floats/">Clearing Floats</a></li>
            <li id="1641" class="menu-item">
            <a href="http://localhost/frytest/about/page-with-comments/">Page with comments</a></li>
            <li id="1642" class="menu-item">
            <a href="http://localhost/frytest/about/page-with-comments-disabled/">Page with comments disabled</a></li>
        </ul>
    </li>
    <li id="1643" class="menu-item" aria-haspopup="true">
        <a href="http://localhost/frytest/level-1/">Level 1</a>
        <button class="dropdown-toggle" aria-expanded="true">
            <span class="screen-reader-text">expand child menu</span>
        </button>
        <ul class="sub-menu">
            <li id="1644" class="menu-item" aria-haspopup="true">
                <a href="http://localhost/frytest/level-1/level-2/">Level 2</a>
                <button class="dropdown-toggle" aria-expanded="true">
                    <span class="screen-reader-text">expand child menu</span>
                </button>
                <ul class="sub-menu">
                    <li id="1645" class="menu-item">
                    <a href="http://localhost/frytest/level-1/level-2/level-3/">Level 3</a></li>
                    <li id="1699" class="menu-item">
                    <a href="http://localhost/frytest/level-1/level-2/level-3a/">Level 3a</a></li>
                    <li id="1700" class="menu-item">
                    <a href="http://localhost/frytest/level-1/level-2/level-3b/">Level 3b</a></li>
                </ul>
            </li>
            <li id="1701" class="menu-item">
            <a href="http://localhost/frytest/level-1/level-2a/">Level 2a</a></li>
            <li id="1702" class="menu-item">
            <a href="http://localhost/frytest/level-1/level-2b/">Level 2b</a></li>
        </ul>
    </li>
    <li id="1646" class="menu-item">
        <a href="http://localhost/frytest/lorem-ipsum/">Lorem Ipsum</a></li>
    <li id="1703" class="menu-item">
        <a href="http://localhost/frytest/page-a/">Page A</a></li>
    <li id="1704" class="menu-item">
        <a href="http://localhost/frytest/page-b/">Page B</a></li>
</ul>
</div>  
</nav>

附加子菜单的每个元素都有一个按钮，用作打开和关闭附加元素的切换。我一直在尝试编程菜单的功能，并有一个棘手的问题。单击下拉切换时，将运行此javascript：

container.find( '.dropdown-toggle' ).click( 
     function( e ){

    var _this = $( this );
    e.preventDefault();


    $('.dropdown-toggle.toggle-on').toggleClass('toggle-on');
    $('.sub-menu.toggled-on').toggleClass('toggled-on');

    _this.parents('.sub-menu').toggleClass('toggled-on');
    //This is the line that doesnt run
    _this.parents('.dropdown-toggle').toggleClass('toggle-on');

    //toggles the chevron clicked to go on
    _this.toggleClass( 'toggle-on' );
    _this.next( '.children, .sub-menu' ).toggleClass( 'toggled-on' );
    //Below has no effect of expansion
    _this.attr( 'aria-expanded', _this.attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' ); 

    _this.html( _this.html() === screenReaderText.expand ? screenReaderText.collapse : screenReaderText.expand );
    } 
    );

不起作用的行是

 _this.parents(".dropdown-toggle").toggleClass("toggle-on")

它上面的一行确实有效，但这一行并不适用。我认为这是因为虽然按钮位于点击按钮的上方，但它并不算作父级，因为它与<ul>标签位于同一级别上以上一行。

如何直接在单击的上方切换所有按钮的课程？

Answer 1

一种方法可能是上升2次，然后使用按钮选择器下降1次。

我想它看起来像这样：

_this.parent().parent().children('button')

Javascript影响与父

1 个答案: