2 级响应菜单不显示块

Question

我正在尝试让我的旧菜单响应较小的屏幕尺寸。我让菜单图标正常工作，但是当我打开列表时，它显示内联而不是块。我尝试了几种选择，但无法正常工作。

function myFunction() {
    var x = document.getElementById("myTopnav");
    if (x.className === "menu") {
        x.className += " responsive";
    } else {
        x.className = "menu";
    }
}

/* Main menu */


.menu
{
 width: 100%;
 margin: -15px 0 0 0;
 padding: 0 0 0 0;
 list-style: none;
 background: #d1d1d1;
 background: -moz-linear-gradient(#d1d1d1, #b6b6b6);
 background: -webkit-gradient(linear,left bottom,left top,color-stop(0, #d1d1d1),color-stop(1, #b6b6b6));
 background: -webkit-linear-gradient(#d1d1d1, #b6b6b6);
 background: -o-linear-gradient(#d1d1d1, #b6b6b6);
 background: -ms-linear-gradient(#d1d1d1, #b6b6b6);
 background: linear-gradient(#d1d1d1, #b6b6b6);
 border-bottom: 4px solid #005da2;
 -moz-box-shadow: 0 2px 1px #9c9c9c;
 -webkit-box-shadow: 0 2px 1px #9c9c9c;
 box-shadow: 0 2px 1px #9c9c9c;
}

.menu li
{
 float: left;
 padding: 0 0 10px 0;
 position: relative;
 line-height: 0;
 border-right: 1px solid #b6b6b6;
}

.menu li:hover {
 background: #0186ba;
 background: -moz-linear-gradient(#04acec,  #0186ba); 
 background: -webkit-gradient(linear, left top, left bottom, from(#04acec), to(#0186ba));
 background: -webkit-linear-gradient(#04acec,  #0186ba);
 background: -o-linear-gradient(#04acec,  #0186ba);
 background: -ms-linear-gradient(#04acec,  #0186ba);
 background: linear-gradient(#04acec,  #0186ba);
 /*-moz-box-shadow: 0 0 2px rgba(255,255,255,.5);
    -webkit-box-shadow: 0 0 2px rgba(255,255,255,.5);
    box-shadow: 0 0 2px rgba(255,255,255,.5); 
    -moz-border-radius: 5px;
    border-radius: 5px;*/
 z-index: 9999 !important;
}

.menu a 
{
 float: left;
 height: 25px;
 padding: 10px 25px 0 25px;
 color: #000;
 text-transform: uppercase;
 font: bold 12px/25px Arial, Helvetica;
 text-decoration: none;
}

.menu li:hover > a
{
 color: #fafafa;
}

*html .menu li a:hover /* IE6 */
{
 color: #fafafa;
}

.menu li:hover > ul
{
 display: block;
 z-index: 9999 !important;
}

/* Sub-menu */

.menu ul
{
    list-style: none;
    margin: 0;
    padding: 0;    
    display: none;
    position: absolute;
    top: 45px;
    left: 0;
    z-index: 9999 !important;    
    background: #444;
    background: -moz-linear-gradient(#444, #111);
    background: -webkit-gradient(linear,left bottom,left top,color-stop(0, #111),color-stop(1, #444));
    background: -webkit-linear-gradient(#444, #111);    
    background: -o-linear-gradient(#444, #111); 
    background: -ms-linear-gradient(#444, #111); 
    background: linear-gradient(#444, #111);
    -moz-box-shadow: 0 0 2px rgba(255,255,255,.5);
    -webkit-box-shadow: 0 0 2px rgba(255,255,255,.5);
    box-shadow: 0 0 2px rgba(255,255,255,.5);
}

.menu ul ul
{
  top: 0;
  left: 150px;
  z-index: 9999 !important;
}

.menu ul li
{
    float: none;
    margin: 0;
    padding: 0;
    display: block;  
    -moz-box-shadow: 0 1px 0 #111111, 0 2px 0 #777777;
    -webkit-box-shadow: 0 1px 0 #111111, 0 2px 0 #777777;
    box-shadow: 0 1px 0 #111111, 0 2px 0 #777777;
}

.menu ul li:last-child
{   
    -moz-box-shadow: none;
    -webkit-box-shadow: none;
    box-shadow: none;    
}

.menu ul a
{    
    padding: 10px;
 height: 40px;
 width: auto;
 height: auto;
    line-height: 1;
    display: block;
    white-space: nowrap;
    float: none;
 text-transform: none;
 color: #fff;

}

*html .menu ul a /* IE6 */
{    
 height: 10px;
}

*:first-child+html .menu ul a /* IE7 */
{    
 height: 10px;
}

.menu ul a:hover
{
    background: #0186ba;
 background: -moz-linear-gradient(#04acec,  #0186ba); 
 background: -webkit-gradient(linear, left top, left bottom, from(#04acec), to(#0186ba));
 background: -webkit-linear-gradient(#04acec,  #0186ba);
 background: -o-linear-gradient(#04acec,  #0186ba);
 background: -ms-linear-gradient(#04acec,  #0186ba);
 background: linear-gradient(#04acec,  #0186ba);
}

.menu ul li:first-child > a
{
    -moz-border-radius: 5px 5px 0 0;
    border-radius: 5px 5px 0 0;
}

.menu ul li:first-child > a:after
{
    content: '';
    position: absolute;
    left: 30px;
    top: -8px;
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-bottom: 8px solid #444;
}

.menu ul ul li:first-child a:after
{
    left: -8px;
    top: 12px;
    width: 0;
    height: 0;
    border-left: 0; 
    border-bottom: 5px solid transparent;
    border-top: 5px solid transparent;
    border-right: 8px solid #444;
}

.menu ul li:first-child a:hover:after
{
    border-bottom-color: #04acec; 
}

.menu ul ul li:first-child a:hover:after
{
    border-right-color: #04acec; 
    border-bottom-color: transparent;  
}


.menu ul li:last-child > a
{
    -moz-border-radius: 0 0 5px 5px;
    border-radius: 0 0 5px 5px;
}

/* Clear floated elements */
.menu:after 
{
 visibility: hidden;
 display: block;
 font-size: 0;
 content: " ";
 clear: both;
 height: 0;
}


ul.menu li.icon {display: none;}

/* When the screen is less than 680 pixels wide, hide all list items, except for the first one ("Home"). Show the list item that contains the link to open and close the topnav (li.icon) */
@media screen and (max-width:680px) {
  ul.menu li:not(:first-child) {display: none;}
  ul.menu li.icon {
    float: right;
    display: inline-block;
  }
}

/* The "responsive" class is added to the topnav with JavaScript when the user clicks on the icon. This class makes the topnav look good on small screens */
@media screen and (max-width:680px) {
  ul.menu.responsive {position: relative;}
  ul.menu.responsive li.icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  ul.menu.responsive li {
    float: none;
    display: inline;
  }
  ul.menu.responsive li a {
    display: block;
    text-align: left;
  }
}

* html .menu             { zoom: 1; } /* IE6 */
*:first-child+html .menu { zoom: 1; } /* IE7 */

     <!--MENU-->
        <ul class="menu" id="myTopnav">
            <li><a href="#">Home</a></li>
            <li><a href="#">Videos</a>
              <ul>
      <li><a href="#">Videos 1</a></li>
      <li><a href="#">Videos 2</a></li>
      <li><a href="#">Videos 3</a></li>
               </ul>
         </li>
              
      <li><a href="#">Headlines</a>
             <ul>
 <li><a href="#">Headlines All</a></li>
<li><a href="#">Headlines Last Week</a></li>
               </ul>
            </li>
    <li><a href="#">Pictures</a></li>
          </li>
<li class="icon">
    <a href="javascript:void(0);" onclick="myFunction()">&#9776;</a>
  </li>

Answer 1

你必须把display: block;放在里

此外，不要忘记删除 a 元素上的集合 float: none;。

我在图标上添加了一个 z-index 以便即使您在第一个元素上也能关闭它。

这可能对您有帮助：

function myFunction() {
    var x = document.getElementById("myTopnav");
    if (x.className === "menu") {
        x.className += " responsive";
    } else {
        x.className = "menu";
    }
}

/* Main menu */


.menu
{
 width: 100%;
 margin: -15px 0 0 0;
 padding: 0 0 0 0;
 list-style: none;
 background: #d1d1d1;
 background: -moz-linear-gradient(#d1d1d1, #b6b6b6);
 background: -webkit-gradient(linear,left bottom,left top,color-stop(0, #d1d1d1),color-stop(1, #b6b6b6));
 background: -webkit-linear-gradient(#d1d1d1, #b6b6b6);
 background: -o-linear-gradient(#d1d1d1, #b6b6b6);
 background: -ms-linear-gradient(#d1d1d1, #b6b6b6);
 background: linear-gradient(#d1d1d1, #b6b6b6);
 border-bottom: 4px solid #005da2;
 -moz-box-shadow: 0 2px 1px #9c9c9c;
 -webkit-box-shadow: 0 2px 1px #9c9c9c;
 box-shadow: 0 2px 1px #9c9c9c;
}

.menu li
{
 float: left;
 padding: 0 0 10px 0;
 position: relative;
 line-height: 0;
 border-right: 1px solid #b6b6b6;
}

.menu li:hover {
 background: #0186ba;
 background: -moz-linear-gradient(#04acec,  #0186ba); 
 background: -webkit-gradient(linear, left top, left bottom, from(#04acec), to(#0186ba));
 background: -webkit-linear-gradient(#04acec,  #0186ba);
 background: -o-linear-gradient(#04acec,  #0186ba);
 background: -ms-linear-gradient(#04acec,  #0186ba);
 background: linear-gradient(#04acec,  #0186ba);
 /*-moz-box-shadow: 0 0 2px rgba(255,255,255,.5);
    -webkit-box-shadow: 0 0 2px rgba(255,255,255,.5);
    box-shadow: 0 0 2px rgba(255,255,255,.5); 
    -moz-border-radius: 5px;
    border-radius: 5px;*/
 z-index: 9999 !important;
}

.menu a 
{
 float: left;
 height: 25px;
 padding: 10px 25px 0 25px;
 color: #000;
 text-transform: uppercase;
 font: bold 12px/25px Arial, Helvetica;
 text-decoration: none;
}

.menu li:hover > a
{
 color: #fafafa;
}

*html .menu li a:hover /* IE6 */
{
 color: #fafafa;
}

.menu li:hover > ul
{
 display: block;
 z-index: 9999 !important;
}

/* Sub-menu */

.menu ul
{
    list-style: none;
    margin: 0;
    padding: 0;    
    display: none;
    position: absolute;
    top: 45px;
    left: 0;
    z-index: 9999 !important;    
    background: #444;
    background: -moz-linear-gradient(#444, #111);
    background: -webkit-gradient(linear,left bottom,left top,color-stop(0, #111),color-stop(1, #444));
    background: -webkit-linear-gradient(#444, #111);    
    background: -o-linear-gradient(#444, #111); 
    background: -ms-linear-gradient(#444, #111); 
    background: linear-gradient(#444, #111);
    -moz-box-shadow: 0 0 2px rgba(255,255,255,.5);
    -webkit-box-shadow: 0 0 2px rgba(255,255,255,.5);
    box-shadow: 0 0 2px rgba(255,255,255,.5);
}

.menu ul ul
{
  top: 0;
  left: 150px;
  z-index: 9999 !important;
}

.menu ul li
{
    float: none;
    margin: 0;
    padding: 0;
    display: block;  
    -moz-box-shadow: 0 1px 0 #111111, 0 2px 0 #777777;
    -webkit-box-shadow: 0 1px 0 #111111, 0 2px 0 #777777;
    box-shadow: 0 1px 0 #111111, 0 2px 0 #777777;
}

.menu ul li:last-child
{   
    -moz-box-shadow: none;
    -webkit-box-shadow: none;
    box-shadow: none;    
}

.menu ul a
{    
    padding: 10px;
 height: 40px;
 width: auto;
 height: auto;
    line-height: 1;
    display: block;
    white-space: nowrap;
    float: none;
 text-transform: none;
 color: #fff;

}

*html .menu ul a /* IE6 */
{    
 height: 10px;
}

*:first-child+html .menu ul a /* IE7 */
{    
 height: 10px;
}

.menu ul a:hover
{
    background: #0186ba;
 background: -moz-linear-gradient(#04acec,  #0186ba); 
 background: -webkit-gradient(linear, left top, left bottom, from(#04acec), to(#0186ba));
 background: -webkit-linear-gradient(#04acec,  #0186ba);
 background: -o-linear-gradient(#04acec,  #0186ba);
 background: -ms-linear-gradient(#04acec,  #0186ba);
 background: linear-gradient(#04acec,  #0186ba);
}

.menu ul li:first-child > a
{
    -moz-border-radius: 5px 5px 0 0;
    border-radius: 5px 5px 0 0;
}

.menu ul li:first-child > a:after
{
    content: '';
    position: absolute;
    left: 30px;
    top: -8px;
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-bottom: 8px solid #444;
}

.menu ul ul li:first-child a:after
{
    left: -8px;
    top: 12px;
    width: 0;
    height: 0;
    border-left: 0; 
    border-bottom: 5px solid transparent;
    border-top: 5px solid transparent;
    border-right: 8px solid #444;
}

.menu ul li:first-child a:hover:after
{
    border-bottom-color: #04acec; 
}

.menu ul ul li:first-child a:hover:after
{
    border-right-color: #04acec; 
    border-bottom-color: transparent;  
}


.menu ul li:last-child > a
{
    -moz-border-radius: 0 0 5px 5px;
    border-radius: 0 0 5px 5px;
}

/* Clear floated elements */
.menu:after 
{
 visibility: hidden;
 display: block;
 font-size: 0;
 content: " ";
 clear: both;
 height: 0;
}


ul.menu li.icon {display: none;}

/* When the screen is less than 680 pixels wide, hide all list items, except for the first one ("Home"). Show the list item that contains the link to open and close the topnav (li.icon) */
@media screen and (max-width:680px) {
  ul.menu li:not(:first-child) {display: none;}
  ul.menu li.icon {
    float: right;
    display: inline-block;
  }
}

/* The "responsive" class is added to the topnav with JavaScript when the user clicks on the icon. This class makes the topnav look good on small screens */
@media screen and (max-width:680px) {
  ul.menu.responsive {position: relative;}
  ul.menu.responsive li.icon {
    position: absolute;
    right: 0;
    top: 0;
    z-index: 10000;
  }
  ul.menu.responsive li {
    float: none;
    display: block;
  }
  ul.menu.responsive li a {
    display: block;
    text-align: left;
    float: none;
  }
}

* html .menu             { zoom: 1; } /* IE6 */
*:first-child+html .menu { zoom: 1; } /* IE7 */

<!--MENU-->
        <ul class="menu" id="myTopnav">
            <li><a href="#">Home</a></li>
            <li><a href="#">Videos</a>
              <ul>
      <li><a href="#">Videos 1</a></li>
      <li><a href="#">Videos 2</a></li>
      <li><a href="#">Videos 3</a></li>
               </ul>
         </li>
              
      <li><a href="#">Headlines</a>
             <ul>
 <li><a href="#">Headlines All</a></li>
<li><a href="#">Headlines Last Week</a></li>
               </ul>
            </li>
    <li><a href="#">Pictures</a></li>
          </li>
<li class="icon">
    <a href="javascript:void(0);" onclick="myFunction()">&#9776;</a>
  </li>

2 级响应菜单不显示块

2 level responsive menu doesn't display block

javascript

css

menu

responsive