【问题标题】:accordion menu expand and close on button click手风琴菜单在按钮单击时展开和关闭
【发布时间】:2018-01-16 17:49:48
【问题描述】:

基本上,我有这个类别菜单,当单击加减号按钮时,它会展开和关闭,单击父类别和子类别时也会这样做。如果您单击子子类别,则会将您带到一个页面。

我想要的是 菜单只会在单击加减号按钮时展开。 如果您单击父类别或子类别,它将带您到一个页面并保持打开状态。加载时应如下所示。仅在顶级打开时显示打开的子类别。子 子类别仅在单击时打开。

我希望在打开或单击父类别时只打开子类别。因此,如果您要加载菜单,它将看起来像

顶级

-子类别

-子类别

-子类

顶级

-子类别

-子类别

-子类

感谢任何帮助

检查我的代码笔https://codepen.io/mdaniel559/pen/QMvWwW

html

<div class="sidebar nobottommargin">
  <!--Categories-->
  <div class="menu-header">Categories</div>

  <figure class="widget shadowonly r_corners wrapper m_bottom_30">

    <div class="widget_content">
      <!--Categories list-->
      <ul class="categories_list">
        <li class="active">
          <a href="http://#" class="f_size_large scheme_color d_block relative">
            <b>Top Level Category</b>
            <span class="bg_light_color_1 r_corners f_right color_dark talign_c"></span>
          </a>
          <!--second level-->
          <ul>
            <li class="active">
              <a href="#" class="d_block f_size_large color_dark relative">
                Sub Category<span class="bg_light_color_1 r_corners f_right color_dark talign_c"></span>
              </a>
              <!--third level-->
              <ul>
                <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
              </ul>
            </li>
            <li>
              <a href="#" class="d_block f_size_large color_dark relative">
                Sub Category<span class="bg_light_color_1 r_corners f_right color_dark talign_c"></span>
              </a>
              <!--third level-->
              <ul>
                <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
              </ul>
            </li>
            <li>
              <a href="#" class="d_block f_size_large color_dark relative">
                Sub Category<span class="bg_light_color_1 r_corners f_right color_dark talign_c"></span>
              </a>
              <!--third level-->
              <ul>
                <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
              </ul>
            </li>
          </ul>
        </li>
      </ul>

    </div>
  </figure>
</div>

css

*{
    margin:0;
    padding:0;
    border:none;
}
figure{display:block}
a, b, body, div, figure, html, li, span, ul{
    background: transparent;
    border: 0 none;
    font-weight: inherit;
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    vertical-align: top;
}
a{
    text-decoration:none;
    outline: none !important;
}
b{
    font-weight:bold !important;
}
ul{
    list-style: none;
}
html,body{
    height:100%;
}

/* -----------------------------------

    2. Basic classes and elements 

------------------------------------- */

body{
    font:300 14px/21px 'Roboto', 'sans-serif';
    color:#696e6e;
    background:#232830;
    letter-spacing: 0.1px;
    overflow-x: hidden;
    -webkit-backface-visibility:hidden;
    background-attachment:fixed;
}
.d_block{
    display:block;
}
.f_size_large{
    font-size:1.15em;
}
.r_corners{
    -webkit-border-radius:4px;
    -moz-border-radius:4px;
    border-radius:4px;
}
.relative{
    position:relative;
}
.wrapper{
    overflow: hidden;
}
.m_bottom_30{
    margin-bottom:30px;
}
.f_right{
    float:right;
}
::selection{
    background: #e74c3c;
    color:#fff;
}
::-moz-selection{
    background: #e74c3c;
    color:#fff; 
}
::-o-selection {
    background: #e74c3c;
    color:#fff; 
}
::-ms-selection {
    background: #e74c3c;
    color:#fff;
}
::-webkit-input-placeholder{
    color:#696e6e;
}
::-moz-placeholder{
   color:#696e6e;
   opacity:1;
}
:-ms-input-placeholder {  
   color:#696e6e;
}
::-webkit-scrollbar{
    width:10px;
    background:#323a45;
}
::-webkit-scrollbar-thumb{
    -webkit-border-radius:4px;
    border-radius:4px;
}

/* -----------------------------------

    3. Color Scheme

------------------------------------- */

a,a[class*="color"]:not(.color_light):hover,.scheme_color{
    color:#e74c3c;
}
::-webkit-scrollbar-thumb{
    background:#e74c3c; 
}

/* -----------------------------------

    4. Typography

------------------------------------- */
a{
    -webkit-transition: color .4s ease, background-color .4s ease;
    -moz-transition: color .4s ease, background-color .4s ease;
    -o-transition: color .4s ease, background-color .4s ease;
    transition: color .4s ease, background-color .4s ease;
}
a:hover,.color_dark{
    color:#292f38;
}
.bg_light_color_1{
    background:#ecf0f1;
}



/* -----------------------------------

    10. Lists and navigations

------------------------------------- */
.categories_list .active > a > span:after{
    opacity:1;
}
.categories_list .active > a > span:before,.categories_list a > span:after{
    opacity:0;
}
.categories_list > li:last-child > a{
    border:none;
}
.categories_list{
    margin-top:-7px;
}
.categories_list a{
    padding:7px 25px 7px 0;
    border-bottom:1px solid #ecf0f1;
    word-break:break-all;
}
.categories_list > li:last-child > a{
    padding-bottom:0px;
}
.categories_list ul > li > a{
    padding-left:20px;
}
.categories_list ul ul > li > a{
    padding-left:40px;
}
.categories_list a > span{
    display:block;
    width:23px;
    height:23px;
    line-height: 23px;
    position:absolute;
    right:0;
    top:50%;
    margin-top:-11.5px;
}
.categories_list a > span:before,.categories_list a > span:after{
    content:"";
    width:9px;
    height:9px;
    background:url("../images/plusminus.png") no-repeat;
    position: absolute;
    display:block;
    top:50%;
    left:50%;
    margin:-5px 0 0 -4px;
    -webkit-transition:opacity .4s ease;
    -moz-transition:opacity .4s ease;
    -o-transition:opacity .4s ease;
    transition:opacity .4s ease;
}
.categories_list a > span:after{
    height:1px;
    width:8px;
    background-position: 0 -9px;
    margin:-1px 0 0 -4px;
}
@media only screen and (-webkit-min-device-pixel-ratio:0){
    .categories_list a > span:before,
    .categories_list a > span:after{
        margin-left:-5px;
    }
}




/**** disabling Isotope CSS3 transitions ****/
.widget_content{
    padding:23px 20px 25px; 
    background: #fff;
}


/* -----------------------------------

    18. Responsive changes

------------------------------------- */
@media only screen and (max-width: 992px){
    .widget_content{
        padding-left:19px;
        padding-right:19px;
    }
}
@media only screen and (max-width:768px){
    /* tables change*/
}

/* -----------------------------------

    19. Retina ready

------------------------------------- */

@media only screen and (-webkit-min-device-pixel-ratio: 1.5),
only screen and (min-resolution: 144 dpi){
    .categories_list a > span:before,.categories_list a > span:after{
        background-image:url("../images/plusminus@2x.png");
        background-size:9px 10px;       
    }
}

jquery

jQuery('button[type="reset"]:not(#styleswitcher button[type="reset"])').on('click',function(){
      color.eq(0).addClass('active').parent().siblings().children('button').removeClass('active');
      slider.slider( "option", "values", [ 0, 237 ] );
    });

  jQuery('.categories_list').on('click','a',function(e){
    if(jQuery(this).parent().children('ul').length){
      jQuery(this).parent().toggleClass('active').end().next().slideToggle();
      e.preventDefault();
    }
  });

  jQuery('.categories_list > li > a').on('click',function(e){
    if(jQuery(this).parent().children('ul').length){
      jQuery(this).toggleClass('scheme_color').toggleClass('color_dark');
      e.preventDefault();
    }
  });

【问题讨论】:

    标签: javascript jquery html css menu


    【解决方案1】:

    好的,如果我理解正确,您只想在单击 + 按钮时展开滑块。

    这就是我所做的,而不是单击 a 标签,而是单击 a 标签内的 span 标签,这是加号,现在因为 span 是 a 标签的子级,所以您必须添加另一个级别slideToggle() 的 parent()。

    然后像往常一样添加指向标签的链接,现在是:

    <a href="#"></a>
    

    您应该将其更改为:

    <a href="/contact"></a>
    

      jQuery('.categories_list').on('click','span',function(e){
        if(jQuery(this).parent().parent().children('ul').length){
          jQuery(this).parent().parent().toggleClass('active').end().next().slideToggle();
          e.preventDefault();
        }
      });
    *{
    	margin:0;
    	padding:0;
    	border:none;
    }
    figure{display:block}
    a, b, body, div, figure, html, li, span, ul{
        background: transparent;
        border: 0 none;
    	font-weight: inherit;
        margin: 0;
    	padding: 0;
    	border: 0;
    	outline: 0;
        vertical-align: top;
    }
    a{
    	text-decoration:none;
    	outline: none !important;
    }
    b{
    	font-weight:bold !important;
    }
    ul{
    	list-style: none;
    }
    html,body{
    	height:100%;
    }
    
    /* -----------------------------------
    
    	2. Basic classes and elements 
    
    ------------------------------------- */
    
    body{
    	font:300 14px/21px 'Roboto', 'sans-serif';
    	color:#696e6e;
    	background:#232830;
    	letter-spacing: 0.1px;
    	overflow-x: hidden;
    	-webkit-backface-visibility:hidden;
    	background-attachment:fixed;
    }
    .d_block{
    	display:block;
    }
    .f_size_large{
    	font-size:1.15em;
    }
    .r_corners{
    	-webkit-border-radius:4px;
    	-moz-border-radius:4px;
    	border-radius:4px;
    }
    .relative{
    	position:relative;
    }
    .wrapper{
    	overflow: hidden;
    }
    .m_bottom_30{
    	margin-bottom:30px;
    }
    .f_right{
    	float:right;
    }
    ::selection{
    	background: #e74c3c;
    	color:#fff;
    }
    ::-moz-selection{
    	background: #e74c3c;
    	color:#fff;	
    }
    ::-o-selection {
    	background: #e74c3c;
    	color:#fff;	
    }
    ::-ms-selection {
    	background: #e74c3c;
    	color:#fff;
    }
    ::-webkit-input-placeholder{
    	color:#696e6e;
    }
    ::-moz-placeholder{
       color:#696e6e;
       opacity:1;
    }
    :-ms-input-placeholder {  
       color:#696e6e;
    }
    ::-webkit-scrollbar{
    	width:10px;
    	background:#323a45;
    }
    ::-webkit-scrollbar-thumb{
    	-webkit-border-radius:4px;
    	border-radius:4px;
    }
    
    /* -----------------------------------
    
    	3. Color Scheme
    
    ------------------------------------- */
    
    a,a[class*="color"]:not(.color_light):hover,.scheme_color{
    	color:#e74c3c;
    }
    ::-webkit-scrollbar-thumb{
    	background:#e74c3c;	
    }
    
    /* -----------------------------------
    
    	4. Typography
    
    ------------------------------------- */
    a{
    	-webkit-transition: color .4s ease, background-color .4s ease;
    	-moz-transition: color .4s ease, background-color .4s ease;
    	-o-transition: color .4s ease, background-color .4s ease;
    	transition: color .4s ease, background-color .4s ease;
    }
    a:hover,.color_dark{
    	color:#292f38;
    }
    .bg_light_color_1{
    	background:#ecf0f1;
    }
    
    
    
    /* -----------------------------------
    
    	10. Lists and navigations
    
    ------------------------------------- */
    .categories_list .active > a > span:after{
    	opacity:1;
    }
    .categories_list .active > a > span:before,.categories_list a > span:after{
    	opacity:0;
    }
    .categories_list > li:last-child > a{
    	border:none;
    }
    .categories_list{
    	margin-top:-7px;
    }
    .categories_list a{
    	padding:7px 25px 7px 0;
    	border-bottom:1px solid #ecf0f1;
    	word-break:break-all;
    }
    .categories_list > li:last-child > a{
    	padding-bottom:0px;
    }
    .categories_list ul > li > a{
    	padding-left:20px;
    }
    .categories_list ul ul > li > a{
    	padding-left:40px;
    }
    .categories_list a > span{
    	display:block;
    	width:23px;
    	height:23px;
    	line-height: 23px;
    	position:absolute;
    	right:0;
    	top:50%;
    	margin-top:-11.5px;
    }
    .categories_list a > span:before,.categories_list a > span:after{
    	content:"";
    	width:9px;
    	height:9px;
    	background:url("http://velikorodnov.com/html/flatastic/classic/images/plusminus.png") no-repeat;
    	position: absolute;
    	display:block;
    	top:50%;
    	left:50%;
    	margin:-5px 0 0 -4px;
    	-webkit-transition:opacity .4s ease;
    	-moz-transition:opacity .4s ease;
    	-o-transition:opacity .4s ease;
    	transition:opacity .4s ease;
    }
    .categories_list a > span:after{
    	height:1px;
    	width:8px;
    	background-position: 0 -9px;
    	margin:-1px 0 0 -4px;
    }
    @media only screen and (-webkit-min-device-pixel-ratio:0){
    	.categories_list a > span:before,
    	.categories_list a > span:after{
    		margin-left:-5px;
    	}
    }
    
    
    
    
    /**** disabling Isotope CSS3 transitions ****/
    .widget_content{
    	padding:23px 20px 25px;	
    	background: #fff;
    }
    
    
    /* -----------------------------------
    
    	18. Responsive changes
    
    ------------------------------------- */
    @media only screen and (max-width: 992px){
    	.widget_content{
    		padding-left:19px;
    		padding-right:19px;
    	}
    }
    @media only screen and (max-width:768px){
    	/* tables change*/
    }
    
    /* -----------------------------------
    
    	19. Retina ready
    
    ------------------------------------- */
    
    @media only screen and (-webkit-min-device-pixel-ratio: 1.5),
    only screen and (min-resolution: 144 dpi){
    	.categories_list a > span:before,.categories_list a > span:after{
    		background-image:url("http://velikorodnov.com/html/flatastic/classic/images/plusminus@2x.png");
    		background-size:9px 10px;		
    	}
    }
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
    <div class="sidebar nobottommargin">
      <!--Categories-->
      <div class="menu-header">Categories</div>
    
      <figure class="widget shadowonly r_corners wrapper m_bottom_30">
    
        <div class="widget_content">
          <!--Categories list-->
          <ul class="categories_list">
            <li class="active">
              <a href="#" class="f_size_large scheme_color d_block relative">
                <b>Top Level Category</b>
                <span class="bg_light_color_1 r_corners f_right color_dark talign_c"></span>
              </a>
              <!--second level-->
              <ul>
                <li class="active">
                  <a href="#" class="d_block f_size_large color_dark relative">
                    Sub Category<span class="bg_light_color_1 r_corners f_right color_dark talign_c"></span>
                  </a>
                  <!--third level-->
                  <ul>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                  </ul>
                </li>
                <li>
                  <a href="#" class="d_block f_size_large color_dark relative">
                    Sub Category<span class="bg_light_color_1 r_corners f_right color_dark talign_c"></span>
                  </a>
                  <!--third level-->
                  <ul>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                  </ul>
                </li>
                <li>
                  <a href="#" class="d_block f_size_large color_dark relative">
                    Sub Category<span class="bg_light_color_1 r_corners f_right color_dark talign_c"></span>
                  </a>
                  <!--third level-->
                  <ul>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                  </ul>
                </li>
              </ul>
            </li>
          </ul>
          
        </div>
      </figure>
    </div>

    更新,只显示第一级和第二级,将 style="display:none" 设置为第三级列表并在第一级设置类活动 li only

    jQuery('.categories_list').on('click','span',function(e){
        if(jQuery(this).parent().parent().children('ul').length){
          jQuery(this).parent().parent().toggleClass('active').end().next().slideToggle();
          e.preventDefault();
        }
      });
    *{
    	margin:0;
    	padding:0;
    	border:none;
    }
    figure{display:block}
    a, b, body, div, figure, html, li, span, ul{
        background: transparent;
        border: 0 none;
    	font-weight: inherit;
        margin: 0;
    	padding: 0;
    	border: 0;
    	outline: 0;
        vertical-align: top;
    }
    a{
    	text-decoration:none;
    	outline: none !important;
    }
    b{
    	font-weight:bold !important;
    }
    ul{
    	list-style: none;
    }
    html,body{
    	height:100%;
    }
    
    /* -----------------------------------
    
    	2. Basic classes and elements 
    
    ------------------------------------- */
    
    body{
    	font:300 14px/21px 'Roboto', 'sans-serif';
    	color:#696e6e;
    	background:#232830;
    	letter-spacing: 0.1px;
    	overflow-x: hidden;
    	-webkit-backface-visibility:hidden;
    	background-attachment:fixed;
    }
    .d_block{
    	display:block;
    }
    .f_size_large{
    	font-size:1.15em;
    }
    .r_corners{
    	-webkit-border-radius:4px;
    	-moz-border-radius:4px;
    	border-radius:4px;
    }
    .relative{
    	position:relative;
    }
    .wrapper{
    	overflow: hidden;
    }
    .m_bottom_30{
    	margin-bottom:30px;
    }
    .f_right{
    	float:right;
    }
    ::selection{
    	background: #e74c3c;
    	color:#fff;
    }
    ::-moz-selection{
    	background: #e74c3c;
    	color:#fff;	
    }
    ::-o-selection {
    	background: #e74c3c;
    	color:#fff;	
    }
    ::-ms-selection {
    	background: #e74c3c;
    	color:#fff;
    }
    ::-webkit-input-placeholder{
    	color:#696e6e;
    }
    ::-moz-placeholder{
       color:#696e6e;
       opacity:1;
    }
    :-ms-input-placeholder {  
       color:#696e6e;
    }
    ::-webkit-scrollbar{
    	width:10px;
    	background:#323a45;
    }
    ::-webkit-scrollbar-thumb{
    	-webkit-border-radius:4px;
    	border-radius:4px;
    }
    
    /* -----------------------------------
    
    	3. Color Scheme
    
    ------------------------------------- */
    
    a,a[class*="color"]:not(.color_light):hover,.scheme_color{
    	color:#e74c3c;
    }
    ::-webkit-scrollbar-thumb{
    	background:#e74c3c;	
    }
    
    /* -----------------------------------
    
    	4. Typography
    
    ------------------------------------- */
    a{
    	-webkit-transition: color .4s ease, background-color .4s ease;
    	-moz-transition: color .4s ease, background-color .4s ease;
    	-o-transition: color .4s ease, background-color .4s ease;
    	transition: color .4s ease, background-color .4s ease;
    }
    a:hover,.color_dark{
    	color:#292f38;
    }
    .bg_light_color_1{
    	background:#ecf0f1;
    }
    
    
    
    /* -----------------------------------
    
    	10. Lists and navigations
    
    ------------------------------------- */
    .categories_list .active > a > span:after{
    	opacity:1;
    }
    .categories_list .active > a > span:before,.categories_list a > span:after{
    	opacity:0;
    }
    .categories_list > li:last-child > a{
    	border:none;
    }
    .categories_list{
    	margin-top:-7px;
    }
    .categories_list a{
    	padding:7px 25px 7px 0;
    	border-bottom:1px solid #ecf0f1;
    	word-break:break-all;
    }
    .categories_list > li:last-child > a{
    	padding-bottom:0px;
    }
    .categories_list ul > li > a{
    	padding-left:20px;
    }
    .categories_list ul ul > li > a{
    	padding-left:40px;
    }
    .categories_list a > span{
    	display:block;
    	width:23px;
    	height:23px;
    	line-height: 23px;
    	position:absolute;
    	right:0;
    	top:50%;
    	margin-top:-11.5px;
    }
    .categories_list a > span:before,.categories_list a > span:after{
    	content:"";
    	width:9px;
    	height:9px;
    	background:url("http://velikorodnov.com/html/flatastic/classic/images/plusminus.png") no-repeat;
    	position: absolute;
    	display:block;
    	top:50%;
    	left:50%;
    	margin:-5px 0 0 -4px;
    	-webkit-transition:opacity .4s ease;
    	-moz-transition:opacity .4s ease;
    	-o-transition:opacity .4s ease;
    	transition:opacity .4s ease;
    }
    .categories_list a > span:after{
    	height:1px;
    	width:8px;
    	background-position: 0 -9px;
    	margin:-1px 0 0 -4px;
    }
    @media only screen and (-webkit-min-device-pixel-ratio:0){
    	.categories_list a > span:before,
    	.categories_list a > span:after{
    		margin-left:-5px;
    	}
    }
    
    
    
    
    /**** disabling Isotope CSS3 transitions ****/
    .widget_content{
    	padding:23px 20px 25px;	
    	background: #fff;
    }
    
    
    /* -----------------------------------
    
    	18. Responsive changes
    
    ------------------------------------- */
    @media only screen and (max-width: 992px){
    	.widget_content{
    		padding-left:19px;
    		padding-right:19px;
    	}
    }
    @media only screen and (max-width:768px){
    	/* tables change*/
    }
    
    /* -----------------------------------
    
    	19. Retina ready
    
    ------------------------------------- */
    
    @media only screen and (-webkit-min-device-pixel-ratio: 1.5),
    only screen and (min-resolution: 144 dpi){
    	.categories_list a > span:before,.categories_list a > span:after{
    		background-image:url("http://velikorodnov.com/html/flatastic/classic/images/plusminus@2x.png");
    		background-size:9px 10px;		
    	}
    }
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
    <div class="sidebar nobottommargin">
      <!--Categories-->
      <div class="menu-header">Categories</div>
    
      <figure class="widget shadowonly r_corners wrapper m_bottom_30">
    
        <div class="widget_content">
          <!--Categories list-->
          <ul class="categories_list">
            <li class="active">                        <!-- class active -->
              <a href="#" class="f_size_large scheme_color d_block relative">
                <b>Top Level Category</b>
                <span class="bg_light_color_1 r_corners f_right color_dark talign_c"></span>
              </a>
              <!--second level-->
              <ul>
                <li>
                  <a href="#" class="d_block f_size_large color_dark relative">
                    Sub Category<span class="bg_light_color_1 r_corners f_right color_dark talign_c"></span>
                  </a>
                  <!--third level-->
                  <ul style="display:none;">          <!-- display none -->
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                  </ul>
                </li>
                <li>
                  <a href="#" class="d_block f_size_large color_dark relative">
                    Sub Category<span class="bg_light_color_1 r_corners f_right color_dark talign_c"></span>
                  </a>
                  <!--third level-->
                  <ul style="display:none;">          <!-- display none -->
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                  </ul>
                </li>
                <li>
                  <a href="#" class="d_block f_size_large color_dark relative">
                    Sub Category<span class="bg_light_color_1 r_corners f_right color_dark talign_c"></span>
                  </a>
                  <!--third level-->
                  <ul style="display:none;">          <!-- display none -->
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                    <li><a href="#" class="color_dark d_block">Sub Sub Category</a></li>
                  </ul>
                </li>
              </ul>
            </li>
          </ul>
          
        </div>
      </figure>
    </div>

    【讨论】:

    • 这种方法对我来说很有意义。但是我确实有一个问题。参见上面的例子,当父类别打开或单击时,我希望只打开子类别。子子类别只有在点击加号时才会打开。
    • 加号和减号单击以展开是的作品。但是如何只显示子类别。顶层是唯一一个在加载时扩展的。
    • 很简单,一开始就设置style="display:none"为三级,请检查更新
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