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Multi-Level Radial Nav Menu with jQuery and CSS3

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License: MIT
   
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Multi-Level Radial Nav Menu with jQuery and CSS3

A cool navigation experiment created by aardrian that helps you create a multi-level radius popup menu using jQuery and CSS3.

How to use it:

1. Create a multi-level menu from a nested nav list.

<nav role="navigation">
  <h1 id="NavLbl">Menu</h1>
  <ol>
    <li><a href="#Bio">Home</a>
      <ol>
        <li><a href="#">Contact</a></li>
        <li><a href="#">Policy</a></li>
      </ol>
    </li>
    <li><a href="#">Blog</a></li>
    <li><a href="#">Services</a>
      <ol>
        <li><a href="#">Service 1</a></li>
        <li><a href="#">Service 2</a></li>
	<li><a href="#">Service 3</a></li>
      </ol>
    </li>
    <li><a href="#">Social</a>
      <ol>
        <li><a href="#">Facebook</a></li>
        <li><a href="#">Twitter</a></li>
        <li><a href="#">Goolge+</a></li>
      </ol>
    </li>
    <li><a href="#">Category</a>
      <ol>
        <li><a href="#">Category 1</a></li>
        <li><a href="#">Category 2</a></li>
	<li><a href="#">Category 3</a></li>
      </ol>
    </li>
    <li><a href="#">About</a></li>
  </ol>
</nav>

2. The core CSS/CSS3 styles for the radial menu.

@media (max-width:23em), (max-height:22em) {

nav {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
  background-color: #000;
}

nav::after {
  content: "";
  display: block;
  clear: both;
}

nav h1 { display: none; }

nav ol,
nav li {
  margin: 0;
  padding: 0;
  list-style-type: none;
}

nav ol ol { display: none; }

nav a {
  display: block;
  box-sizing: border-box;
  width: 50%;
  float: left;
  margin: 0;
  padding: 1em 0;
  text-align: center;
  color: #fff;
  background-color: #000;
  text-decoration: none;
  outline: none;
  border: .07em solid #333;
}

nav li:hover a,
nav li:focus a,
nav li.focus a {
  background-color: #222;
  outline: none;
}

nav>ol>li a[aria-label^="Current"],
nav>ol>li:hover a[aria-label^="Current"],
nav>ol>li:focus a[aria-label^="Current"] { color: #444; }
}

/* Short, wide display */

@media (min-width:23em) and (max-height:22em) {

nav a { width: 33.333%; }
}

/* Short, wider display */

@media (min-width:32em) and (max-height:22em) {

nav a { width: 25%; }
}

/* Short, wider display */

@media (min-width:40em) and (max-height:22em) {

nav a { width: 20%; }
}

/* Short, even wider display */

@media (min-width:48em) and (max-height:22em) {

nav a { width: 16.666667%; }
}

/* The screen is now wide and tall enough to show the entire menu without cutting anything off. */

@media (min-width:23em) and (max-width:1800px) and (min-height:22em) {

nav {
  box-sizing: border-box;
  position: fixed;
  top: 0;
  right: 0;
  padding: 0;
  border-radius: 0 0 0 100%;
  width: 2em;
  height: 2em;
  transition: all .25s ease-in;
}

nav:hover,
nav:focus,
nav.focus {
  background-color: rgba(0, 0, 0, 0.4);
  width: 18em;
  height: 17em;
  outline: none;
}

nav h1 {
  box-sizing: border-box;
  font-size: 100%;
  text-transform: uppercase;
  font-weight: normal;
  position: fixed;
  top: 0;
  right: 0;
  margin: 0;
  padding: 1em .5em 2.3em 1.8em;
  border-left: .15em solid #fff;
  border-bottom: .15em solid #fff;
  background-color: #000;
  border-radius: 0 0 0 100%;
  z-index: 50;
}

nav ol,
nav li {
  margin: 0;
  padding: 0;
  list-style-type: none;
}

nav li { position: absolute; }

nav li,
nav a {
  display: block;
  box-sizing: border-box;
  top: -5em;
  right: -5em;
  transition: all 0.2s ease-in;
}

nav a {
  border-radius: 100%;
  border: .15em solid #fff;
  padding: 1.5em 0;
  width: 4.5em;
  height: 4.5em;
  overflow: hidden;
  text-align: center;
  box-shadow: 0 0 1.5em rgba(50, 50, 50, 0.75);
  color: #fff;
  background-color: #000;
  text-decoration: none;
  outline: none;
}

nav>ol>li,
nav>ol>li>a { z-index: 10; }

nav li:hover a,
nav li:focus a,
nav li.focus a {
  background-color: #222;
  box-shadow: 0 0 1.5em rgba(0, 0, 0, 1);
  outline: none;
  position: relative;
  left: 0;
  top: auto;
}

nav>ol>li:hover,
nav>ol>li:focus,
nav>ol>li.focus { z-index: 25; }

/* Just hide anything beyond 5*/

nav>ol>li:nth-child(n+6) { display: none; }

/* Positioning the first tier */

nav:hover>ol>li:nth-child(1),
nav:focus>ol>li:nth-child(1),
nav.focus>ol>li:nth-child(1) {
  right: 13.5em;
  top: .2em;
}

nav:hover>ol>li:nth-child(2),
nav:focus>ol>li:nth-child(2),
nav.focus>ol>li:nth-child(2) {
  right: 12em;
  top: 4.75em;
}

nav:hover>ol>li:nth-child(3),
nav:focus>ol>li:nth-child(3),
nav.focus>ol>li:nth-child(3) {
  right: 9.0em;
  top: 8.5em;
}

nav:hover>ol>li:nth-child(4),
nav:focus>ol>li:nth-child(4),
nav.focus>ol>li:nth-child(4) {
  right: 5em;
  top: 11.25em;
}

nav:hover>ol>li:nth-child(5),
nav:focus>ol>li:nth-child(5),
nav.focus>ol>li:nth-child(5) {
  right: .4em;
  top: 12.5em;
}

/* Positioning the second tier */

nav>ol>li>ol {
  background-color: rgba(0, 0, 0, 0);
  width: 0;
  height: 0;
  display: block;
  position: absolute;
  border-radius: 100%;
  transition: all .2s ease-in;
  left: 2.25em;
  top: 2.25em;
  left: 0;
  top: 0;
}

nav>ol>li:hover>ol,
nav>ol>li:focus>ol,
nav>ol>li.focus>ol {
  width: 15em;
  height: 15em;
  margin-top: -5.25em;
  margin-left: -5.25em;
  background-color: rgba(0, 0, 0, 0.6);
}

nav>ol>li>ol>li,
nav>ol>li>ol>li a {
  position: absolute;
  transition: all .2s ease-in;
  top: 0;
  left: 0;
}

nav>ol>li>ol>li a {
  border-color: #f60;
  box-shadow: none;
  transition: all .2s ease-in;
  display: none;
}

nav>ol>li:hover>ol>li,
nav>ol>li:focus>ol>li,
nav>ol>li.focus>ol>li { z-index: 5; }

nav>ol>li:hover>ol>li a,
nav>ol>li:focus>ol>li a,
nav>ol>li.focus>ol>li a {
  background-color: #000;
  box-shadow: none;
  z-index: 5;
  display: block;
}

nav>ol>li>ol>li a:hover,
nav>ol>li>ol>li a:focus {
  background-color: #222;
  box-shadow: 0 0 1.5em rgba(0, 0, 0, 1);
}

/* Position individual items */

nav>ol>li:hover>ol>li:nth-child(1),
nav>ol>li:focus>ol>li:nth-child(1),
nav>ol>li.focus>ol>li:nth-child(1),
nav>ol>li:nth-child(5):hover>ol>li:nth-child(3),
nav>ol>li:nth-child(5):focus>ol>li:nth-child(3),
nav>ol>li:nth-child(5).focus>ol>li:nth-child(3) {
  left: 2.75em;
  top: 1em;
}

nav>ol>li:hover>ol>li:nth-child(2),
nav>ol>li:focus>ol>li:nth-child(2),
nav>ol>li.focus>ol>li:nth-child(2) {
  left: 7.75em;
  top: 1em;
}

nav>ol>li:hover>ol>li:nth-child(3),
nav>ol>li:focus>ol>li:nth-child(3),
nav>ol>li.focus>ol>li:nth-child(3),
nav>ol>li:nth-child(1):hover>ol>li:nth-child(1),
nav>ol>li:nth-child(1):focus>ol>li:nth-child(1),
nav>ol>li:nth-child(1).focus>ol>li:nth-child(1) {
  left: 10.25em;
  top: 5.25em;
}

nav>ol>li:hover>ol>li:nth-child(4),
nav>ol>li:focus>ol>li:nth-child(4),
nav>ol>li.focus>ol>li:nth-child(4),
nav>ol>li:nth-child(1):hover>ol>li:nth-child(2),
nav>ol>li:nth-child(1):focus>ol>li:nth-child(2),
nav>ol>li:nth-child(1).focus>ol>li:nth-child(2) {
  left: 7.75em;
  top: 9.5em;
}

nav>ol>li:hover>ol>li:nth-child(5),
nav>ol>li:focus>ol>li:nth-child(5),
nav>ol>li.focus>ol>li:nth-child(5),
nav>ol>li:nth-child(1):hover>ol>li:nth-child(3),
nav>ol>li:nth-child(1):focus>ol>li:nth-child(3),
nav>ol>li:nth-child(1).focus>ol>li:nth-child(3),
nav>ol>li:nth-child(5):hover>ol>li:nth-child(1),
nav>ol>li:nth-child(5):focus>ol>li:nth-child(1),
nav>ol>li:nth-child(5).focus>ol>li:nth-child(1) {
  left: 2.75em;
  top: 9.5em;
}

nav>ol>li:hover>ol>li:nth-child(6),
nav>ol>li:focus>ol>li:nth-child(6),
nav>ol>li.focus>ol>li:nth-child(6),
nav>ol>li:nth-child(1):hover>ol>li:nth-child(4),
nav>ol>li:nth-child(1):focus>ol>li:nth-child(4),
nav>ol>li:nth-child(1).focus>ol>li:nth-child(4),
nav>ol>li:nth-child(5):hover>ol>li:nth-child(2),
nav>ol>li:nth-child(5):focus>ol>li:nth-child(2),
nav>ol>li:nth-child(5).focus>ol>li:nth-child(2) {
  left: .25em;
  top: 5.25em;
}

/* Just hide anything beyond 6. */

nav>ol>li>ol>li:nth-child(n+7),
nav>ol>li:hover>ol>li:nth-child(n+7),
nav>ol>li:focus>ol>li:nth-child(n+7),
nav>ol>li.focus>ol>li:nth-child(n+7) { display: none; }

/* Hide from 5 items and up on the first menu. */

nav>ol>li:nth-child(1):hover>ol>li:nth-child(n+5),
nav>ol>li:nth-child(1):focus>ol>li:nth-child(n+5),
nav>ol>li:nth-child(1).focus>ol>li:nth-child(n+5) { display: none; }

/* Hide from 4 items and up on the last menu.*/

nav>ol>li:nth-child(5):hover>ol>li:nth-child(n+4),
nav>ol>li:nth-child(5):focus>ol>li:nth-child(n+4),
nav>ol>li:nth-child(5).focus>ol>li:nth-child(n+4) { display: none; }

/* Style links that are current page/section. */

nav>ol>li a[aria-label^="Current"],
nav>ol>li:hover a[aria-label^="Current"],
nav>ol>li:focus a[aria-label^="Current"] {
  color: #666;
  border-color: #999;
}
}

@media screen and (-ms-high-contrast: active) {

nav>ol>li a[aria-label^="Current"],
nav>ol>li:hover a[aria-label^="Current"],
nav>ol>li:focus a[aria-label^="Current"] { background-color: #00c; }
}

3. Load the latest version of jQuery library at the end of the document.

<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

4. The JavaScript to enable the radial menu.

$(document).click(function(e) {
  $("nav *, nav").removeClass("focus");
});

function classy(){
  $("nav *, nav").removeClass("focus");
  $("nav:focus").addClass("focus");
  $("nav a:focus").addClass("focus");
  $("nav a:focus").parentsUntil("body").addClass("focus");
}

This awesome jQuery plugin is developed by aardrian. For more Advanced Usages, please check the demo page or visit the official website.