如何通过html和css完成下拉菜单的制作？-H5 튜토리얼-php.cn

回复内容：

집

웹 프론트엔드

H5 튜토리얼

如何通过html和css完成下拉菜单的制作？

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jun 07, 2016 am 08:43 AM

例如这种，当然这只是一个例子，其他的也行，如果可以，请简要说明一下用到哪些技能点和原理。

回复内容：

几个下拉菜单display:none
按钮 :hover 给下拉菜单display:block
也许可以无脚本，纯HTML和 CSS 实现的多级下拉菜单，在非 IE 内核浏览器和 IE8+ 表现完美。

主体使用ul>li>ul>li>......嵌套定义多级。

<span class="cp"><!DOCTYPE HTML></span>
<span class="nt"><html></span>
<span class="nt"><head></span>
  <span class="nt"><meta</span> <span class="na">http-equiv=</span><span class="s">"Content-Type"</span> <span class="na">content=</span><span class="s">"text/html; charset=utf-8"</span><span class="nt">></span>
  <span class="nt"><title></span>纯 CSS 多级菜单<span class="nt"></title></span>
  <span class="nt"><style></span>
    <span class="nc">.menu</span><span class="p">{}</span>
    <span class="nc">.menu</span> <span class="nt">ul</span><span class="o">,</span><span class="nc">.menu</span> <span class="nt">li</span><span class="p">{</span><span class="k">margin</span><span class="o">:</span><span class="m">0</span><span class="p">;</span> <span class="k">padding</span><span class="o">:</span><span class="m">0</span><span class="p">;</span><span class="k">list-style</span><span class="o">:</span><span class="k">none</span> <span class="k">outside</span><span class="p">;}</span>
    <span class="nc">.menu</span><span class="o">></span><span class="nt">ul</span><span class="p">{</span><span class="k">overflow</span><span class="o">:</span><span class="k">auto</span><span class="p">;</span> <span class="k">display</span><span class="o">:</span><span class="k">inline</span><span class="o">-</span><span class="k">block</span><span class="p">;}</span>
    <span class="nc">.menu</span> <span class="nt">a</span><span class="o">,</span><span class="nc">.menu</span> <span class="nt">span</span><span class="p">{</span> <span class="k">cursor</span><span class="o">:</span><span class="k">default</span><span class="p">;</span> <span class="k">height</span><span class="o">:</span><span class="m">30px</span><span class="p">;</span> <span class="k">line-height</span><span class="o">:</span><span class="m">30px</span><span class="p">;</span> <span class="k">padding</span><span class="o">:</span><span class="m">0</span> <span class="m">5px</span><span class="p">;</span> <span class="k">display</span><span class="o">:</span><span class="k">block</span><span class="p">;</span> <span class="k">text</span><span class="o">-</span><span class="k">overflow</span><span class="o">:</span><span class="n">ellipsis</span><span class="p">;</span> <span class="k">overflow</span><span class="o">:</span><span class="k">hidden</span><span class="p">;</span> <span class="k">text-decoration</span><span class="o">:</span><span class="k">none</span><span class="p">;</span> <span class="k">color</span><span class="o">:</span><span class="n">MenuText</span><span class="p">;}</span>
    <span class="nc">.menu</span> <span class="nt">a</span><span class="nd">:hover</span><span class="o">,</span><span class="nc">.menu</span> <span class="nt">span</span><span class="nd">:hover</span><span class="o">,</span><span class="nc">.menu</span> <span class="nt">li</span><span class="nd">:hover</span><span class="o">></span><span class="nt">a</span><span class="o">,</span><span class="nc">.menu</span> <span class="nt">li</span><span class="nd">:hover</span><span class="o">></span><span class="nt">span</span><span class="p">{</span><span class="k">color</span><span class="o">:</span><span class="n">HighlightText</span><span class="p">;}</span>
    <span class="nc">.menu</span> <span class="nt">li</span><span class="nd">:hover</span><span class="p">{</span><span class="k">background-color</span><span class="o">:</span><span class="n">Highlight</span><span class="p">;}</span>
    <span class="nc">.menu</span> <span class="nt">li</span><span class="nd">:hover</span><span class="o">></span><span class="nt">ul</span><span class="p">{</span><span class="k">display</span><span class="o">:</span><span class="k">block</span><span class="p">;}</span>
    <span class="nc">.menu</span><span class="o">></span><span class="nt">ul</span><span class="o">></span><span class="nt">li</span><span class="p">{</span><span class="k">float</span><span class="o">:</span><span class="k">left</span><span class="p">;}</span>
    <span class="nc">.menu</span><span class="o">></span><span class="nt">ul</span><span class="o">></span><span class="nt">li</span> <span class="nt">ul</span><span class="p">{</span><span class="k">display</span><span class="o">:</span><span class="k">none</span><span class="p">;</span><span class="k">float</span><span class="o">:</span><span class="k">left</span><span class="p">;</span> <span class="k">background-color</span><span class="o">:</span><span class="m">#fff</span><span class="p">;</span> <span class="k">border</span><span class="o">:</span><span class="m">1px</span> <span class="k">solid</span> <span class="n">Highlight</span><span class="p">;</span> <span class="k">position</span><span class="o">:</span><span class="k">absolute</span><span class="p">;}</span>
    <span class="nc">.menu</span><span class="o">></span><span class="nt">ul</span><span class="o">></span><span class="nt">li</span> <span class="nt">li</span><span class="p">{</span><span class="k">padding-left</span><span class="o">:</span><span class="m">25px</span><span class="p">;</span><span class="k">margin</span><span class="o">:</span><span class="m">2px</span><span class="p">;</span><span class="k">background</span><span class="o">:</span><span class="k">transparent</span> <span class="sx">url(data:image/gif;base64,R0lGODlhEAAQAIAAAJmZmf///yH5BAAAAAAALAAAAAAQABAAAAIjhI9pwe2+nmRRIQrmjBrmYB1Y93Ak+IXVd6LtiIZwa5JqWAAAOw==)</span> <span class="k">no-repeat</span> <span class="m">5px</span> <span class="k">center</span><span class="p">;</span> <span class="k">width</span><span class="o">:</span><span class="m">150px</span><span class="p">;}</span>
    <span class="nc">.menu</span><span class="o">></span><span class="nt">ul</span><span class="o">></span><span class="nt">li</span><span class="o">></span><span class="nt">ul</span><span class="o">></span><span class="nt">li</span> <span class="nt">ul</span><span class="p">{</span><span class="k">margin-left</span><span class="o">:</span><span class="m">140px</span><span class="p">;</span> <span class="k">margin-top</span><span class="o">:-</span><span class="m">30px</span><span class="p">;}</span>
    <span class="nc">.menu</span> <span class="nt">li</span><span class="nc">.expand</span><span class="o">></span><span class="nt">a</span><span class="o">,</span><span class="nc">.menu</span> <span class="nt">li</span><span class="nc">.expand</span><span class="o">></span><span class="nt">span</span><span class="p">{</span><span class="k">background</span><span class="o">:</span><span class="k">transparent</span> <span class="sx">url(data:image/png;base64,R0lGODlhAwAQAIABAAAAAP///yH5BAEAAAEALAAAAAADABAAAAIKjI8JBtv/wko0FQA7)</span> <span class="k">no-repeat</span> <span class="k">right</span> <span class="k">center</span><span class="p">;</span> <span class="k">padding-right</span><span class="o">:</span><span class="m">10px</span><span class="p">;</span> <span class="k">margin-right</span><span class="o">:</span><span class="m">5px</span><span class="p">;}</span>
    <span class="nc">.menu</span><span class="o">></span><span class="nt">ul</span><span class="o">></span><span class="nt">li</span><span class="nc">.expand</span><span class="o">></span><span class="nt">a</span><span class="o">,</span><span class="nc">.menu</span><span class="o">></span><span class="nt">ul</span><span class="o">></span><span class="nt">li</span><span class="nc">.expand</span><span class="o">></span><span class="nt">span</span><span class="p">{</span> <span class="k">background-image</span><span class="o">:</span><span class="sx">url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAYAAAADCAYAAACwAX77AAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAaSURBVBhXY2BgYPiPAwOFMSXBgjAA0wnmAwASVQv19UVKmwAAAABJRU5ErkJggg==)</span><span class="p">;}</span>
  <span class="nt"></style></span>
<span class="nt"></head></span>

<span class="nt"><body></span>

  <span class="nt"><div</span> <span class="na">id=</span><span class="s">"mainnav"</span> <span class="na">class=</span><span class="s">"menu"</span><span class="nt">></span>
    <span class="nt"><ul></span>
      <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
      <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
      <span class="nt"><li</span> <span class="na">class=</span><span class="s">"expand"</span><span class="nt">><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></span>
        <span class="nt"><ul></span>
          <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
          <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
          <span class="nt"><li</span> <span class="na">class=</span><span class="s">"expand"</span><span class="nt">><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>很长很长很长很长很长很长很长很长很长很长<span class="nt"></a></span>
            <span class="nt"><ul></span>
              <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
              <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
              <span class="nt"><li</span> <span class="na">class=</span><span class="s">"expand"</span><span class="nt">><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>LinkLink<span class="nt"></a></span>
                <span class="nt"><ul></span>
                  <span class="nt"><li</span> <span class="na">class=</span><span class="s">"expand"</span><span class="nt">><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></span>
                    <span class="nt"><ul></span>
                      <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
                      <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
                      <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
                      <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
                      <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
                    <span class="nt"></ul></span>
                  <span class="nt"></li></span>
                  <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
                  <span class="nt"><li</span> <span class="na">class=</span><span class="s">"expand"</span><span class="nt">><span></span>span 菜单项<span class="nt"></span></span>
                    <span class="nt"><ul></span>
                      <span class="nt"><li><span></span>span 菜单项<span class="nt"></span></li></span>
                      <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
                      <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
                      <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
                      <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
                    <span class="nt"></ul></span>
                  <span class="nt"></li></span>
                  <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
                  <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
                <span class="nt"></ul></span>
              <span class="nt"></li></span>
              <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
              <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
            <span class="nt"></ul></span>
          <span class="nt"></li></span>
          <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
          <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
        <span class="nt"></ul></span>
      <span class="nt"></li></span>
      <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
      <span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Link<span class="nt"></a></li></span>
    <span class="nt"></ul></span>
  <span class="nt"></div></span>

<span class="nt"></body></span>
<span class="nt"></html></span>

로그인 후 복사

既然你这么问了，我就当你是新手了，还好，我也是新手。

下面开说：
感觉用select标签效果好像不是很好，效果如下：

不如直接像 @周黎伟所说的，用一个button加上4个div

首先复习一下基本知识：
display：

所以这里我用inline－block

代码如下：

希望大神们能批评指正

最后的效果如图：

<span class="cp"><!DOCTYPE html></span>
<span class="nt"><html</span> <span class="na">lang=</span><span class="s">"en"</span><span class="nt">></span>
<span class="nt"><head></span>
    <span class="nt"><meta</span> <span class="na">charset=</span><span class="s">"UTF-8"</span><span class="nt">></span>
    <span class="nt"><title></span>下拉菜单<span class="nt"></title></span>
    <span class="nt"><style </span><span class="na">type=</span><span class="s">"text/css"</span><span class="nt">></span>
    
    <span class="nc">.bt</span><span class="p">{</span>
        <span class="k">width</span><span class="o">:</span> <span class="m">50px</span><span class="p">;</span><span class="k">height</span><span class="o">:</span> <span class="m">28px</span><span class="p">;</span>
        <span class="k">border</span><span class="o">:</span> <span class="m">1px</span> <span class="k">solid</span> <span class="m">#ddd</span><span class="p">;</span>
        <span class="k">background-color</span><span class="o">:</span> <span class="m">#eee</span><span class="p">;</span>
        <span class="k">font</span><span class="o">:</span><span class="m">12px</span> <span class="s2">"宋体"</span><span class="p">;</span>
    <span class="p">}</span>
    <span class="nc">.ct</span><span class="p">{</span>
        <span class="k">display</span><span class="o">:</span> <span class="k">none</span><span class="p">;}</span>

    <span class="nc">.dt</span><span class="p">{</span>
        <span class="k">height</span><span class="o">:</span> <span class="m">30px</span><span class="p">;</span>
        <span class="k">margin-top</span><span class="o">:</span> <span class="m">0px</span><span class="p">;</span>
        <span class="k">border</span><span class="o">:</span> <span class="m">1px</span> <span class="k">solid</span> <span class="m">#ddd</span><span class="p">;</span>
        <span class="k">background-color</span><span class="o">:</span> <span class="nb">white</span><span class="p">;</span>
        <span class="k">padding</span><span class="o">:</span><span class="k">auto</span> <span class="m">10px</span><span class="p">;</span>
       <span class="p">}</span>

    <span class="nc">.dt1</span><span class="p">{</span>
        <span class="k">height</span><span class="o">:</span> <span class="m">30px</span><span class="p">;</span>
        <span class="k">margin-top</span><span class="o">:</span> <span class="m">1px</span><span class="p">;</span>
        <span class="k">border</span><span class="o">:</span> <span class="m">1px</span> <span class="k">solid</span> <span class="m">#ddd</span><span class="p">;</span>
        <span class="k">background-color</span><span class="o">:</span> <span class="nb">white</span><span class="p">;</span>
        <span class="k">padding</span><span class="o">:</span><span class="k">auto</span> <span class="m">10px</span><span class="p">;}</span>
 
    <span class="nc">.dt</span><span class="nd">:hover</span><span class="o">,</span><span class="nc">.dt1</span><span class="nd">:hover</span><span class="p">{</span><span class="k">background-color</span><span class="o">:</span> <span class="m">#ddd</span><span class="p">;}</span>
    <span class="nc">.bt</span><span class="nd">:hover</span><span class="p">{</span><span class="k">background-color</span><span class="o">:</span> <span class="nb">green</span><span class="p">;}</span>
    <span class="nc">.at</span><span class="nd">:hover</span> <span class="nc">.ct</span><span class="p">{</span><span class="k">display</span><span class="o">:</span> <span class="k">inline</span><span class="o">-</span><span class="k">block</span><span class="p">;}</span>
 
    <span class="nt"></style></span>
<span class="nt"></head></span>
<span class="nt"><body></span>
<span class="nt"><div</span> <span class="na">class=</span><span class="s">"at"</span><span class="nt">></span>
    <span class="nt"><div></span>
        <span class="nt"><button</span> <span class="na">class=</span><span class="s">"bt"</span> <span class="na">type=</span><span class="s">"button"</span> <span class="nt">></span>按钮<span class="nt"></button></span>
    <span class="nt"></div></span>
    <span class="nt"><div</span> <span class="na">class=</span><span class="s">"ct"</span> <span class="nt">></span>
        <span class="nt"><div</span> <span class="na">class=</span><span class="s">"dt1"</span><span class="nt">></span>下拉菜单<span class="nt"></div></span>
        <span class="nt"><div</span> <span class="na">class=</span><span class="s">"dt"</span><span class="nt">></span>下拉菜单<span class="nt"></div></span>
        <span class="nt"><div</span> <span class="na">class=</span><span class="s">"dt"</span><span class="nt">></span>下拉菜单<span class="nt"></div></span>
        <span class="nt"><div</span> <span class="na">class=</span><span class="s">"dt"</span><span class="nt">></span>下拉菜单<span class="nt"></div></span>
    <span class="nt"></div></span>
    <span class="nt"></div></span>  
<span class="nt"></div></span>  
<span class="nt"></body></span>
<span class="nt"></html></span>

로그인 후 복사

要求不高的话用bootstrap 就好了。

做这个功能不难，难的是如何封装和复用。

个人看好polymer这种解决方案。

<span class="cp"><!DOCTYPE html></span>
<span class="nt"><html></span>
<span class="nt"><head></span>
	<span class="nt"><meta</span> <span class="na">charset=</span><span class="s">"utf-8"</span><span class="nt">></span>
	<span class="nt"><title></span>css实现下拉菜单<span class="nt"></title></span>
	<span class="nt"><style </span><span class="na">type=</span><span class="s">"text/css"</span><span class="nt">></span>
	<span class="o">*</span><span class="p">{</span>
		<span class="k">margin</span><span class="o">:</span> <span class="m">0</span><span class="p">;</span>
		<span class="k">padding</span><span class="o">:</span> <span class="m">0</span><span class="p">;</span>
	<span class="p">}</span>
	<span class="nf">#nav</span><span class="p">{</span>
		<span class="k">background-color</span><span class="o">:</span> <span class="m">#eee</span><span class="p">;</span>
		<span class="k">width</span><span class="o">:</span> <span class="m">300px</span><span class="p">;</span>
		<span class="k">height</span><span class="o">:</span> <span class="m">40px</span><span class="p">;</span>
		<span class="k">margin</span><span class="o">:</span> <span class="m">0</span> <span class="k">auto</span><span class="p">;</span>
	<span class="p">}</span>
	<span class="nt">ul</span><span class="p">{</span>
		<span class="k">list-style</span><span class="o">:</span> <span class="k">none</span><span class="p">;</span>
	<span class="p">}</span>
	<span class="nt">ul</span> <span class="nt">li</span> <span class="p">{</span>
		<span class="k">float</span><span class="o">:</span> <span class="k">left</span><span class="p">;</span>
		<span class="k">line-height</span><span class="o">:</span> <span class="m">40px</span><span class="p">;</span>
		<span class="k">text-align</span><span class="o">:</span> <span class="k">center</span><span class="p">;</span>
	<span class="p">}</span>
	<span class="nt">a</span><span class="p">{</span>
		<span class="k">text-decoration</span><span class="o">:</span> <span class="k">none</span><span class="p">;</span>
		<span class="k">color</span><span class="o">:</span><span class="m">#000</span><span class="p">;</span>
		<span class="k">padding</span><span class="o">:</span> <span class="m">0</span> <span class="m">10px</span><span class="p">;</span>
		<span class="k">display</span><span class="o">:</span> <span class="k">block</span><span class="p">;</span>	
	<span class="p">}</span>
	<span class="nt">a</span><span class="nd">:hover</span><span class="p">{</span>
		<span class="k">color</span><span class="o">:</span> <span class="m">#fff</span><span class="p">;</span>
		<span class="k">background-color</span><span class="o">:</span> <span class="m">#666</span><span class="p">;</span>
	<span class="p">}</span>
	<span class="nt">ul</span> <span class="nt">li</span> <span class="nt">ul</span> <span class="nt">li</span><span class="p">{</span>
		<span class="k">float</span><span class="o">:</span> <span class="k">none</span><span class="p">;</span>
		<span class="k">background-color</span><span class="o">:</span> <span class="m">#eee</span><span class="p">;</span>
		<span class="k">margin-top</span><span class="o">:</span> <span class="m">2px</span><span class="p">;</span>
	<span class="p">}</span>
	<span class="nt">ul</span> <span class="nt">li</span> <span class="nt">ul</span> <span class="p">{</span>
		<span class="k">position</span><span class="o">:</span> <span class="k">absolute</span><span class="p">;</span>
		<span class="k">display</span><span class="o">:</span> <span class="k">none</span><span class="p">;</span>
	<span class="p">}</span>
	<span class="nt">ul</span> <span class="nt">li</span> <span class="nt">ul</span> <span class="nt">li</span> <span class="nt">a</span><span class="nd">:hover</span><span class="p">{</span>
		<span class="k">background-color</span><span class="o">:</span> <span class="m">#06f</span><span class="p">;</span>
	<span class="p">}</span>
	<span class="nt">ul</span> <span class="nt">li</span><span class="nd">:hover</span> <span class="nt">ul</span><span class="p">{</span>
		<span class="k">display</span><span class="o">:</span> <span class="k">block</span><span class="p">;</span>
	<span class="p">}</span>
	<span class="nt"></style></span>
<span class="nt"></head></span>
<span class="nt"><body></span>
<span class="nt"><div</span> <span class="na">id=</span><span class="s">"nav"</span><span class="nt">></span>
	<span class="nt"><ul></span>
		<span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>按钮1<span class="nt"></a></li></span>
		<span class="nt"><li></span>
			<span class="nt"><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>按钮2<span class="nt"></a></span>
			<span class="nt"><ul></span>
				<span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>下拉菜单项<span class="nt"></a></li></span>
				<span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>下拉菜单项<span class="nt"></a></li></span>
			<span class="nt"></ul></span>
		<span class="nt"></li></span>
		<span class="nt"><li></span>
			<span class="nt"><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>按钮3<span class="nt"></a></span>
			<span class="nt"><ul></span>
				<span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>下拉菜单项<span class="nt"></a></li></span>
				<span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>下拉菜单项<span class="nt"></a></li></span>
				<span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>下拉菜单项<span class="nt"></a></li></span>
			<span class="nt"></ul></span>
		<span class="nt"></li></span>
		<span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>按钮4<span class="nt"></a></li></span>
		<span class="nt"><li><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>按钮5<span class="nt"></a></li></span>
	<span class="nt"></ul></span>
<span class="nt"></div></span>
<span class="nt"></body></span>
<span class="nt"></html></span>

로그인 후 복사

这个是网易云课堂前端微专业的页面布局的期末测试题。我也试一下。
这里大部分答案都是hover事件触发下拉菜单出现。其实我总觉得这样不太自然，所以我尽力去做成（伪）点击触发。
---------------------------------------------------------------------
# 具体想法：
菜单是，下拉菜单的容器是

...

然后利用a:focus + .dropdown{ ... } 来实现。
---------------------------------------------------------------------
要点1：CSS如何实现影响其他元素？
看这里 > html - How to affect other elements when a div is hovered
要点2：如何做出（伪）点击触发？
基本用 a：focus，个人感觉自然一点。当然如果失去焦点，下拉菜单容器也会相应地隐藏。
--------------------------------------------------------------------
# HTML BODY 部分代码：

<span class="nt"><body></span>
     <span class="nt"><a</span> <span class="na">href=</span><span class="s">"#"</span><span class="nt">></span>Menu<span class="nt"></a></span>
	  <span class="nt"><div</span> <span class="na">class=</span><span class="s">"drop-down"</span> <span class="na">id=</span><span class="s">"drop-down"</span><span class="nt">></span>
		   <span class="nt"><ul></span>
			<span class="nt"><li></span>Option 1<span class="nt"></li></span>				
                        <span class="nt"><li></span>Option 2<span class="nt"></li></span>
			<span class="nt"><li></span>Option 3<span class="nt"></li></span>
			<span class="nt"><li></span>Option 4<span class="nt"></li></span>
		   <span class="nt"></ul></span>
	  <span class="nt"></div></span>
<span class="nt"></body></span>
로그인 후 복사

更正一点小错误，只有一个单选按钮时，选中后就不能取消选中了。所以最好用复选按钮。

原答案如下
===========================

楼上有同学写了css用伪类:hover实现的下拉菜单  这是一种  我再补充下  

下拉菜单抛开样式的不同  交互上无非两种  
鼠标移到button上出现菜单（如楼上）  
以及点击后出现菜单（我要说的） 

题主问的是html+css  而很多同学提到了用js添加click事件  这也是大多数下拉菜单的做法  
不过为了不跑题  就只用html+css  不用js  那就考css基本功了   

这里简单说下思路  

html结构如下
<span class="nt"><button></span>点击我出现下拉菜单<span class="nt"></button></span>
<span class="nt"><input</span> <span class="na">type=</span><span class="s">"checkbok"</span><span class="nt">></span> 
<span class="nt"><div></span>
	<span class="nt"><ul></span>
		<span class="nt"><li></span>XXX<span class="nt"></li></span>
		<span class="nt"><li></span>XXX<span class="nt"></li></span>
		<span class="nt"><li></span>XXX<span class="nt"></li></span>
		<span class="nt"><li></span>XXX<span class="nt"></li></span>
	<span class="nt"></ul></span>
<span class="nt"></div></span>
로그인 후 복사

用列表，隐藏，然后hover.的时候block就可以了

http://pepsized.com/css-only-alternative-to-the-select-element/

如果想用纯css实现click效果:
http://tympanus.net/codrops/2012/12/17/css-click-events/

본 웹사이트의 성명

본 글의 내용은 네티즌들의 자발적인 기여로 작성되었으며, 저작권은 원저작자에게 있습니다. 본 사이트는 이에 상응하는 법적 책임을 지지 않습니다. 표절이나 침해가 의심되는 콘텐츠를 발견한 경우 admin@php.cn으로 문의하세요.

핫 AI 도구

Video Face Swap

완전히 무료인 AI 얼굴 교환 도구를 사용하여 모든 비디오의 얼굴을 쉽게 바꾸세요!

뜨거운 도구

뜨거운 주제

Gmail 이메일의 로그인 입구는 어디에 있나요?

7645

Cakephp 튜토리얼

1392

Steam의 계정 이름 형식은 무엇입니까?

Win11 활성화 키 영구

NYT 연결 힌트와 답변

152

Related knowledge

H5 프로젝트를 실행하는 방법 Apr 06, 2025 pm 12:21 PM

H5 프로젝트를 실행하려면 다음 단계가 필요합니다. Web Server, Node.js, 개발 도구 등과 같은 필요한 도구 설치. 개발 환경 구축, 프로젝트 폴더 작성, 프로젝트 초기화 및 코드 작성. 개발 서버를 시작하고 명령 줄을 사용하여 명령을 실행하십시오. 브라우저에서 프로젝트를 미리보고 개발 서버 URL을 입력하십시오. 프로젝트 게시, 코드 최적화, 프로젝트 배포 및 웹 서버 구성을 설정하십시오.

H5 페이지 제작은 정확히 무엇을 의미합니까? Apr 06, 2025 am 07:18 AM

H5 Page 프로덕션은 HTML5, CSS3 및 JavaScript와 같은 기술을 사용하여 크로스 플랫폼 호환 웹 페이지의 생성을 말합니다. 핵심은 브라우저의 구문 분석 코드, 렌더링 구조, 스타일 및 대화식 기능에 있습니다. 일반적인 기술에는 애니메이션 효과, 반응 형 디자인 및 데이터 상호 작용이 포함됩니다. 오류를 피하려면 개발자를 디버깅해야합니다. 성능 최적화 및 모범 사례에는 이미지 형식 최적화, 요청 감소 및 코드 사양 등이 포함됩니다. 로딩 속도 및 코드 품질을 향상시킵니다.

H5를 만드는 방법 아이콘을 클릭하십시오 Apr 06, 2025 pm 12:15 PM

H5 클릭 아이콘을 생성하는 단계에는 다음이 포함됩니다. 이미지 편집 소프트웨어에서 정사각형 소스 이미지 준비. H5 편집기에 상호 작용을 추가하고 클릭 이벤트를 설정하십시오. 전체 아이콘을 덮는 핫스팟을 만듭니다. 페이지로 점프하거나 애니메이션 트리거링과 같은 클릭 이벤트의 동작을 설정하십시오. h5 문서를 HTML, CSS 및 JavaScript 파일로 내보내십시오. 내보내는 파일을 웹 사이트 또는 기타 플랫폼에 배포하십시오.

H5 페이지 제작에 적합한 응용 프로그램 시나리오 Apr 05, 2025 pm 11:36 PM

H5 (HTML5)는 마케팅 캠페인 페이지, 제품 디스플레이 페이지 및 기업 프로모션 마이크로 웨스 사이트와 같은 가벼운 응용 프로그램에 적합합니다. 그것의 장점은 교차 성형 및 풍부한 상호 작용에있어 있지만, 그 한계는 복잡한 상호 작용 및 애니메이션, 로컬 리소스 액세스 및 오프라인 기능에 있습니다.

H5 페이지 제작은 프론트 엔드 개발입니까? Apr 05, 2025 pm 11:42 PM

예, H5 페이지 제작은 HTML, CSS 및 JavaScript와 같은 핵심 기술을 포함하는 프론트 엔드 개발을위한 중요한 구현 방법입니다. 개발자는 & lt; canvas & gt; 그래픽을 그리거나 상호 작용 동작을 제어하기 위해 JavaScript를 사용하는 태그.

H5 프로그래밍 언어는 무엇입니까? Apr 03, 2025 am 12:16 AM

H5는 독립형 프로그래밍 언어가 아니라 최신 웹 애플리케이션을 구축하기위한 HTML5, CSS3 및 JavaScript 모음입니다. 1. HTML5는 웹 페이지 구조와 컨텐츠를 정의하고 새로운 태그와 API를 제공합니다. 2. CSS3은 스타일과 레이아웃을 제어하고 애니메이션과 같은 새로운 기능을 소개합니다. 3. JavaScript는 동적 상호 작용을 구현하고 DOM 작업 및 비동기 요청을 통해 기능을 향상시킵니다.

H5는 무엇을 언급합니까? 맥락 탐색 Apr 12, 2025 am 12:03 AM

h5referstohtml5, apivotaltechnologyinwebdevelopment.1) html5introducesnewelements 및 dynamicwebapplications.2) itsupp ortsmultimediawithoutplugins, enovannangeserexperienceacrossdevices.3) SemanticLementsImproveContentsTructUreAndSeo.4) H5'Srespo

H5로 팝업 창을 만드는 방법 Apr 06, 2025 pm 12:12 PM

H5 팝업 창 생성 단계 : 1. 트리거링 메소드를 결정합니다 (클릭, 시간, 종료, 스크롤); 2. 디자인 컨텐츠 (제목, 텍스트, 액션 버튼); 3. 세트 스타일 (크기, 색상, 글꼴, 배경); 4. 코드 구현 (HTML, CSS, JavaScript); 5. 테스트 및 배포.

See all articles

핫 AI 도구

Undresser.AI Undress

AI Clothes Remover

Undress AI Tool

Clothoff.io

Video Face Swap

인기 기사

뜨거운 도구

메모장++7.3.1

SublimeText3 중국어 버전

스튜디오 13.0.1 보내기

드림위버 CS6

SublimeText3 Mac 버전

뜨거운 주제

如何通过html和css完成下拉菜单的制作？

回复内容：