CSS
/* Important styles */
#toggle {
display: block;
width: 30px;
height: 30px;
margin: 100px auto 10px;
}
#toggle span:after,
#toggle span:before {
content: "";
position: absolute;
left: 0;
top: -9px;
}
#toggle span:after{
top: 9px;
}
#toggle span {
position: relative;
display: block;
}
#toggle span,
#toggle span:after,
#toggle span:before {
width: 100%;
height: 5px;
background-color: #888;
transition: all 0.3s;
backface-visibility: hidden;
border-radius: 2px;
}
/* on activation */
#toggle.on span {
background-color: transparent;
}
#toggle.on span:before {
transform: rotate(45deg) translate(5px, 5px);
}
#toggle.on span:after {
transform: rotate(-45deg) translate(7px, -8px);
}
#toggle.on + #menu {
opacity: 1;
visibility: visible;
}
/* menu appearance*/
#menu {
position: relative;
color: #999;
width: 200px;
padding: 10px;
margin: auto;
font-family: "Segoe UI", Candara, "Bitstream Vera Sans", "DejaVu Sans", "Bitstream Vera Sans", "Trebuchet MS", Verdana, "Verdana Ref", sans-serif;
text-align: center;
border-radius: 4px;
background: white;
box-shadow: 0 1px 8px rgba(0,0,0,0.05);
/* just for this demo */
opacity: 0;
visibility: hidden;
transition: opacity .4s;
}
#menu:after {
position: absolute;
top: -15px;
left: 95px;
content: "";
display: block;
border-left: 15px solid transparent;
border-right: 15px solid transparent;
border-bottom: 20px solid white;
}
ul, li, li a {
list-style: none;
display: block;
margin: 0;
padding: 0;
}
li a {
padding: 5px;
color: #888;
text-decoration: none;
transition: all .2s;
}
li a:hover,
li a:focus {
background: #1ABC9C;
color: #fff;
}
/* demo styles */
body { margin-top: 3em; background: #eee; color: #555; font-family: "Open Sans", "Segoe UI", Helvetica, Arial, sans-serif; }
p, p a { font-size: 12px;text-align: center; color: #888; }
JAVASCRIPT
var theToggle = document.getElementById('toggle');
// hasClass
function hasClass(elem, className) {
return new RegExp(' ' + className + ' ').test(' ' + elem.className + ' ');
}
// addClass
function addClass(elem, className) {
if (!hasClass(elem, className)) {
elem.className += ' ' + className;
}
}
// removeClass
function removeClass(elem, className) {
var newClass = ' ' + elem.className.replace( /[\t\r\n]/g, ' ') + ' ';
if (hasClass(elem, className)) {
while (newClass.indexOf(' ' + className + ' ') >= 0 ) {
newClass = newClass.replace(' ' + className + ' ', ' ');
}
elem.className = newClass.replace(/^\s+|\s+$/g, '');
}
}
// toggleClass
function toggleClass(elem, className) {
var newClass = ' ' + elem.className.replace( /[\t\r\n]/g, " " ) + ' ';
if (hasClass(elem, className)) {
while (newClass.indexOf(" " + className + " ") >= 0 ) {
newClass = newClass.replace( " " + className + " " , " " );
}
elem.className = newClass.replace(/^\s+|\s+$/g, '');
} else {
elem.className += ' ' + className;
}
}
theToggle.onclick = function() {
toggleClass(this, 'on');
return false;
}
