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HTML

            
              <div class="menu">
	<span class="bar"></span>
	<span class="bar"></span>
</div>

<a href="https://github.com/alikinvv/hamburger-animation"  target="_blank" class="github"></a>
!

CSS

            
              @t: 0.2s;
@delay: 0.05s;

.menu {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	overflow: hidden;
	padding: 15px;
	cursor: pointer;
	&.active {
		&:before {
			animation: slideLeft @t @delay ease-out forwards; 
		}
		&:after {animation: slideRight @t @delay ease-out forwards}
		.bar {
			animation: rotate45 @t ease-out forwards;
			&:last-child {animation: rotate135 @t @t ease-out forwards}
		}
	}
	&.back {
		&:before {
			transform: translateX(-120%);
			animation: slideBack @t @delay ease-out forwards;
		}
		&:after {
			transform: translateX(120%);
			animation: slideBack @t @delay ease-out forwards;
		}
		.bar {
			transform: rotate(-45deg);
			animation: rotateBack @t ease-out forwards;
			&:last-child {
				transform: rotate(-135deg);
				animation: rotateBack @t @t ease-out forwards;
			}
		}
	}
	&:before {
		content: '';
		display: block;
		width: 75px;
		height: 10px;
		background: #000;		
	}
	&:after {
		content: '';
		display: block;
		width: 75px;
		height: 10px;
		background: #000;		
	}
	.bar {
		display: block;
		width: 75px;
		height: 10px;
		background: #000; 
		margin: 14px 0;		
		&:last-child {
			opacity: 0;
			transform: rotate(-45deg);
			position: absolute;
			top: 25px;			
		}
	}
}

@keyframes rotate135 {
	form {
		opacity: 1;
		transform: rotate(-45deg);
	}
	to {
		opacity: 1;
		transform: rotate(-135deg);
	}
}

@keyframes rotate45 {to {transform: rotate(-45deg)}}
@keyframes rotateBack {to {transform: rotate(0)}}
@keyframes slideRight {to {transform: translateX(122%)}}
@keyframes slideLeft {to {transform: translateX(-122%)}}
@keyframes slideBack {to {transform: translateX(0)}}


.github {
	width: 40px;
	height: 40px;
	background: url(http://alikinvv.github.io/github.svg) no-repeat center;
	position: fixed;
	bottom: 40px;
	right: 40px;
	animation: github 3s cubic-bezier(0.68, -0.55, 0.27, 1.55) 0s infinite;
}

@keyframes github {
	0% {
		transform: scale(1);
	}
	50% {
		transform: scale(1.2);
	}
	100% {
		transform: scale(1);
	}
}
!

JS

            
              $('.menu').click(function() {
	if($(this).is('.active:not(.back)')) {
		 $(this).addClass('back');
	} else if ($(this).is('.back')) {
		$(this).removeClass('back');
	} else {
		$(this).addClass('active');
	}
});
!
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