Collapsible category listing without jQuery - html

Question

I'm working on an ebay shop. I need to make categories collapsible after I click the root item (if that is even possible) following ebay's guidelines.
Rules:
Ebay doesn't want us to use active content, that means no JavaScript, flash.
It only allows us to use CSS3.
We can't even change the output HTML for categories. So only option available is CSS.
HTML:
<div id="org-categories">
<div class="ttl">Shop home</div>
<ul class="lev1">
<li>CAT A</li>
<ul class="lev2">
<li>sub cat 1</li>
<li>sub cat 2</li>
</ul>
<li>CAT B</li>
<ul class="lev2">
<li>sub cat 1</li>
<li>sub cat 2</li>
</ul>
<li>CAT C</li>
<ul class="lev2">
<li>sub cat 1</li>
<li>sub cat 2</li>
</ul>
</ul>
</div>

Answer 1

Nice question! Because of this, I just discovered the magic of :focus-within.
<div id="org-categories">
<div class="ttl">Shop home</div>
<ul class="lev1">
<li>CAT A</li>
<ul class="lev2">
<li>sub cat 1</li>
<li>sub cat 2</li>
</ul>
<li>CAT B</li>
<ul class="lev2">
<li>sub cat 1</li>
<li>sub cat 2</li>
</ul>
<li>CAT C</li>
<ul class="lev2">
<li>sub cat 1</li>
<li>sub cat 2</li>
</ul>
</ul>
</div>
Then here comes the magic:
li + .lev2 {
display: none;
}
li:focus-within + .lev2 {
display: block;
}
Check it out in a fiddle

Answer 2

So after digging into this subject, your request seems impossible with this markup. BUT with minor adjustments to the html you provide, you can achieve it with this minimal style:
<style>
.lev1 li { display:block; }
.lev1 ul { display:none; }
.lev1 ul:target { display:block; }
</style>
<div id="org-categories">
<div class="ttl">Shop home</div>
<ul class="lev1">
<li>CAT A</li>
<ul id="lev2a">
<li>sub cat 1</li>
<li>sub cat 2</li>
</ul>
<li>CAT B</li>
<ul id="lev2b">
<li>sub cat 1</li>
<li>sub cat 2</li>
</ul>
<li>CAT C</li>
<ul id="lev2c">
<li>sub cat 1</li>
<li>sub cat 2</li>
</ul>
</ul>
</div>
*Minor adjustments = change ul's classes to an unique id's. That way the :target pseudo element can affect it.
Hope it solve it, and good luck!

Answer 3

Here is one example on how to do this. Whilst this shows expanding menus, it also has some visual effects. Try it out and adapt yourself. The code itself is from http://www.dynamicdrive.com/
<style>
.bgslidemenu {
font: bold 16px 'Bitter', sans-serif; /* use google font */
position: relative;
width: 100%;
}
.bgslidemenu:after { /* clear menu */
content: '';
clear: both;
display: block;
}
/* Top Level Menu */
.bgslidemenu ul {
z-index: 100;
margin: 0;
padding: 0;
position: relative;
list-style: none;
float: right; /* change to "left" to left align menu */
}
/* Top level list items */
.bgslidemenu ul li {
position: relative;
display: inline;
margin-right: 20px; /* spacing between each top level menu item */
float: left;
}
/* Top level menu items link style */
.bgslidemenu ul li a {
display: block;
position: relative;
color: white;
padding: 14px 10px;
color: black;
text-decoration: none;
}
.bgslidemenu ul li a:link, .bgslidemenu ul li a:visited {
color: black;
}
/* Top level menu items link style on hover */
.bgslidemenu ul li:hover > a {
color: purple !important;
}
/* LIs links with a sub UL style */
.bgslidemenu ul li > a {
/* add padding to accomodate arrow inside LIs */
padding-right: 25px;
}
/* LIs links with NO sub UL style */
.bgslidemenu ul li > a:only-child {
/* undo padding for non submenu LIs */
padding-right: 10px;
}
/* LIs links with a sub UL pseudo class (Add down arrow) */
.bgslidemenu ul li > a:after {
/* add arrow inside LIs */
content: "";
position: absolute;
height: 0;
width: 0;
border: 5px solid transparent;
border-top-color: black;
top: 50%;
transform: translateY(-20%);
right: 8px;
}
/* LIs links with NO sub UL pseudo class */
.bgslidemenu ul li > a:only-child:after {
/* undo arrow for non submenu LIs */
display: none;
}
/* Sub ULs style */
.bgslidemenu ul li ul {
position: absolute;
left: -5000px;
top: auto;
opacity: 0;
width: 200px; /* width of drop down menus */
visibility: hidden;
padding-top: 80px; /* Add large top padding to drop down menu */
z-index: -1;
background: #F3F3F3;
transform: translateY(100px);
-webkit-transition: opacity .3s, transform .5s, visibility 0s .3s, left 0s .3s;
transition: opacity .3s, transform .5s, visibility 0s .3s, left 0s .3s;
}
/* Sub UL style on hover */
.bgslidemenu ul li:hover > ul {
visibility: visible;
left: -30px;
transform: translateY(-80px); /* move drop down menu upwards (should be smaller than padding-top value above) */
opacity: 1;
-webkit-transition: opacity 1s, transform .5s;
transition: opacity 1s, transform .5s;
}
/* Sub level Menu list items (alters style from Top level List Items) */
.bgslidemenu ul li ul li {
display: list-item;
float: none;
overflow: hidden;
}
/* Add animated line to sub menu item on Mouseover */
.bgslidemenu ul li ul li:after {
content: '';
position: absolute;
width: 30px;
height: 5px;
background: purple;
left: 0;
top: 50%;
transform: translate3d(-100%, -50%, 0);
transition: transform .3s;
}
.bgslidemenu ul ul li:hover:after {
transform: translate3d(0, -50%, 0);
}
/* Sub Levels link style on hover and when active */
.bgslidemenu ul ul li:hover > a {
color: purple !important;
}
/* Sub level menu links style */
.bgslidemenu ul li ul li a {
font: normal 16px 'Bitter', sans-serif;
padding: 10px;
padding-left: 40px; /* Add left padding to sub menu links to accommodate animated line */
position: relative;
margin: 0;
}
/* ####### responsive layout CSS ####### */
#media (max-width: 700px) {
/*
For mobile and screen browser windows
Get Sub ULs to expand entire width of document and drop down
Changes menu reveal type from "visibility" to "display" to overcome bug. See comments below
*/
.bgslidemenu ul {
float: none;
}
.bgslidemenu ul li {
position: relative;
display: block;
width: 100%;
}
.bgslidemenu ul li ul {
width: 100%;
position: relative;
border-top: 2px solid #eee;
/* change menu reveal type from "visibility" to "display". Former seems to cause browser to jump to top of page sometimes when menu header is tapped on */
display: none;
}
.bgslidemenu ul li:hover > ul {
display: block;
padding-top: 0;
transform: none;
z-index: 10000;
left: 0 !important;
top: auto;
}
.bgslidemenu ul ul li:hover > ul {
left: 0 !important;
top: auto;
}
}
</style>
<div class="bgslidemenu">
<ul>
<li>Item 1</li>
<li>Item 2
<ul>
<li>Sub Item 1.1</li>
<li>Sub Item 1.2</li>
<li>Sub Item 1.3</li>
<li>Sub Item 1.4</li>
<li>Sub Item 1.2</li>
<li>Sub Item 1.3</li>
<li>Sub Item 1.4</li>
</ul>
</li>
<li>Item 3</li>
<li>Item 4
<ul>
<li>Sub Item 3.1</li>
<li>Sub Item 3.2</li>
</ul>
</li>
<li>Home</li>
</ul>
</div>