我正在帮助一位 friend 为他的网站设置一个响应式菜单,从一些初步研究中我们未能找到使用 CSS3 实现此目的的方法,而且似乎只能通过 javascript/jquery 来实现。我从未使用过此类语言,希望您能帮助我们实现这一目标:
每当屏幕分辨率为 1200 像素或更小时,我们希望通过单击其父级 li 来扩展子菜单。
下面是当前在鼠标悬停时展开的相关菜单的 HTML 和 CSS。
HTML
<nav id="main_navbar_container" class="navbar navbar-default ">
<div class="container">
<div class="row">
<!-- Brand and expand button get grouped for better mobile display -->
<div id="main_logo_container" class="navbar-header">
<!--Main logo container-->
<div="container">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false"> <span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button> <a id="brand_name_header" class="navbar-brand" href='http://localhost/wordpress/' title='test' rel='home'>
<div>
<img src='http://localhost/wordpress/wp-content/uploads/2015/10/2015.10.13-jbits.png'width="100px">
</div><!-- site-logo -->
</a>
</div>
<!--main logo container-->
<!-- Collect the nav links, forms, and other content for toggling -->
<div id="menu_container">
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<nav id="primary_menu" class="nav navbar-nav">
<div class="menu-home-screen-menu-container">
<ul id="menu-home-screen-menu" class="menu">
<li id="menu-item-447" class="menu-item-447"><a href="http://localhost/wordpress/index.php/home-2/">Home</a>
</li>
<li id="menu-item-428" class="menu-item-428"><a href="http://localhost/wordpress/index.php/about-us/">About us</a>
</li>
<li id="menu-item-429" class="menu-item-429"><a href="http://localhost/wordpress/index.php/recommendations/">Recommendations</a>
</li>
<li id="menu-item-427" class="menu-item-427"><a href="http://localhost/wordpress/index.php/slogans/">Gallery</a>
</li>
<li id="menu-item-13" class="menu-item-13"><a>Services</a>
<ul class="sub-menu">
<li id="menu-item-421" class="menu-item-421"><a href="http://localhost/wordpress/index.php/evacuation-plans/">Evacuation Plans</a>
</li>
<li id="menu-item-425" class="menu-item-425"><a href="http://localhost/wordpress/index.php/risk-assessment/">Risk Assessment</a>
</li>
<li id="menu-item-417" class="menu-item-417"><a href="http://localhost/wordpress/index.php/fire-safety-advice/">Fire safety advice</a>
</li>
<li id="menu-item-424" class="menu-item-424"><a href="http://localhost/wordpress/index.php/risk-management/">Risk Management</a>
</li>
<li id="menu-item-423" class="menu-item-423"><a href="http://localhost/wordpress/index.php/fire-training/">Fire Training</a>
</li>
<li id="menu-item-422" class="menu-item-422"><a href="http://localhost/wordpress/index.php/fire-drills/">Fire Drills</a>
</li>
</ul>
</li>
<li id="menu-item-16" class="menu-item-16"><a>Products</a>
<ul class="sub-menu">
<li id="menu-item-430" class="menu-item-430"><a href="http://localhost/wordpress/index.php/fire-blankets/">Fire blankets</a>
</li>
<li id="menu-item-431" class="menu-item-431"><a href="http://localhost/wordpress/index.php/fire-extinguishers/">Fire extinguishers</a>
</li>
<li id="menu-item-432" class="menu-item-432"><a href="http://localhost/wordpress/index.php/fire-alarms/">Fire alarms</a>
</li>
</ul>
</li>
<li id="menu-item-426" class="menu-item-426"><a href="http://localhost/wordpress/index.php/faqs/">FAQs</a>
</li>
<li id="menu-item-420" class="menu-item-420"><a href="http://localhost/wordpress/index.php/contact-us/">Contact Us</a>
</li>
</ul>
</div>
</ul>
</div>
</div>
</div>
</div>
</nav>
CSS
#main_navbar_container{
margin-bottom:0;
background:white;
}
.navbar-collapse {
text-align:center;
}
#menu_container{
width:80%;
float:right;
display:block;
}
#primary_menu{
display:block;
float:left;
width:100%;
}
#primary_menu ul{
list-style: none;
margin: 0;
padding-left: 0;
}
#primary_menu a,
#primary_menu a:visited,
#primary_menu a:link{
color:#ea474b;
font-weight: 600;
display: block;
text-decoration: none;
padding: 15px 20px;
margin:auto;
}
#primary_menu a:hover{
color:#F9690E;
background: #f1f1f1;
}
#primary_menu li{
float:left;
position:relative;
margin:0
}
#primary_menu ul ul {
box-shadow: 0 3px 3px rgba(0, 0, 0, 0.4);
border-radius: 0 0 4px 4px;
border-width:0 !important;
border: 1px solid #dadada;
background: #fff;
width:100%;
color: #8c9398;
position: absolute;
top: 3.5em;
max-height:0;
overflow-y: hidden;
}
#primary_menu ul li:hover ul {
box-shadow: 0 3px 3px rgba(0, 0, 0, 0.4);
border-radius: 0 0 4px 4px;
border-width:0 !important;
border: 1px solid #dadada;
background: #fff;
width: 200px;
position:absolute;
padding:0;
margin:0;
max-height:400px;
left:-50px;
z-index:999;
transition: max-height 1s;
-webkit-transition: max-height 1s;
-moz-transition: max-height 1s;
-o-transition: max-height 1s;
}
.sub-menu li{
width:100%;
}
#primary_menu ul li ul a{
color:#ea474b;
}
#primary_menu ul li ul li:hover a{
color:#F9690E;
background: #f1f1f1;
}
@media (max-width: 1200px){
#main_navbar_container .container, #menu_container { width: 100%;}
#menu_container .navbar-collapse { padding: 0;}
#primary_menu{
width:100%;
margin:0;
}
#primary_menu li{
width:100%;
margin:5px 0 0 0;
}
#primary_menu ul li ul {
border-radius: 0 !important;
border-color: transparent !important;
background-color:rgb(238,238,238);
display:block;
max-height:0;
-webkit-transition: all 0s;
transition: all 0s;
}
#primary_menu ul li:hover{
background:none;
}
#primary_menu ul li:hover a{
font-color:black;
/*\color:rgb(207,0,15);*/
}
#primary_menu ul li:hover ul{
display:block;
position:initial;
background-color:rgb(238,238,238);
width:100%;
padding:0;
margin:0;
max-height:400px;
transition:max-height 1s;
}
#primary_menu ul li:hover li:first-of-type{
border-top:1px solid rgb(238,238,238);
}
#primary_menu ul li:hover li:last-of-type{
border-bottom:1px solid rgb(238,238,238);
}
#primary_menu ul li:hover a:link,
#primary_menu ul li:hover a:visited{
color:#ea474b;
}
#menu-home-screen-menu{
margin-left:0;
}
}
fiddle 解释:http://jsfiddle.net/ee7zdtb4/
非常感谢您的帮助。
问候, J
最佳答案
We'd like to make the sub-menus expand by clicking their parent li whenever the screen resolution is 1200px or less
您需要使用媒体查询来检测屏幕尺寸,然后相应地更改您的 CSS。
it seems like it's only achievable through javascript / jquery
没有。一点也不。您可以通过将元素与相应的伪类和相邻的兄弟选择器巧妙地混合来很好地做到这一点。 提示:使用带有标签的隐藏复选框来控制兄弟元素。
这是一个小演示。它基于我的一个旧答案,更改为添加媒体查询以允许在屏幕大于 768px
时完全展开 Accordion 样式菜单(您可以根据您的用例进行调整1200)。它被折叠起来,然后由可点击的一级菜单项控制。没有 Javascript,只有 CSS。
在 fiddle 中,拖动并调整输出 Pane 的大小以查看其运行情况。在片段中,单击全屏并返回以查看它的运行情况。使用此演示,然后将其用于您的具体用例。
演示 fiddle :http://jsfiddle.net/abhitalks/Lqpc2Len/
演示片段:
* { box-sizing: border-box; padding: 0; margin: 0; }
body { font-family: sans-serif; font-size: 1em; }
div.accordion {
display: inline-block; vertical-align: top;
width: 240px; margin: 16px; border: 1px solid #ddd;
}
div.accordion label:last-of-type { border: none; }
input { display: none; }
input + label {
display: block; background-color: #eee;
padding: 8px; cursor: pointer; border-bottom: 1px solid #ddd;
font-family: 'segoe ui', sans-serif; font-weight: 300; transition: all 0.25s;
}
input + label:hover { background-color: #ddd; }
input + label::before {
content: '→';
display: inline-block; margin-right: 6px;
font-family: calibri, sans-serif; font-weight: 400; transition: all 0.5s;
}
div.content {
overflow: hidden; height: 0px; padding: 0px;
font-family: calibri, sans-serif; font-weight: 300;
background-color: rgba(250,250,250,0.6); transition: all 0.5s;
}
input:checked + label + div.content { height: 64px; padding: 6px; }
input:checked + label { background-color: #ddd; }
input:checked + label::before { font-weight: 600; transform: rotate(90deg); }
@media screen and (min-width: 768px) {
div.content { height: 64px; padding: 6px; }
input + label::before { font-weight: 600; transform: rotate(90deg); }
}
<div class="accordion">
<input id="i12" name="handle2" type="checkbox" />
<label for="i12">One</label>
<div class="content">Lorem ipsum</div>
<input id="i22" name="handle2" type="checkbox" />
<label for="i22">Two</label>
<div class="content">Lorem ipsum</div>
<input id="i32" name="handle2" type="checkbox" />
<label for="i32">Three</label>
<div class="content">Lorem ipsum</div>
<input id="i42" name="handle2" type="checkbox" />
<label for="i42">Four</label>
<div class="content">Lorem ipsum</div>
</div>
关于javascript - CSS/Javascript - 适用于较小屏幕的移动响应式菜单,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33515279/