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HTML

              
                <body data-spy="scroll" data-target="#scroll-spy">
	
	<!-- Navigation - Fixed Top -->
	<nav class="navbar navbar-fixed-top">
		<div class="container-fluid">
			<!-- Brand and toggle get grouped for better mobile display -->
			<div class="navbar-header">
				<a class="navbar-home" href="#home" role="button">
					<svg class="lnr lnr-home"><use xlink:href="#lnr-home"></use></svg>
				</a>	
				<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#scroll-spy" aria-expanded="false">
					<span class="sr-only">Toggle navigation</span>
					<i class="material-icons">&#xE5D2;</i>
				</button>
<!-- 				<a class="navbar-brand" href="#home">Boom Scroll
					<i class="material-icons">mouse</i>
				</a> -->
			</div>

			<!-- Collect the nav links, forms for toggling -->
			<div class="collapse navbar-collapse" id="scroll-spy">

				<!-- navbar-nav -->
				<ul class="nav navbar-nav ">
					<li><a href="#about">About</a></li>
					<li><a href="#demo">Demo</a></li>
					<li><a href="#features">Features</a></li>
					<li><a href="#howto">How to</a></li>					
				</ul><!-- /.navbar-nav -->
			</div><!-- /.navbar-collapse -->		
		</div><!-- /.container-fluid -->
	</nav><!-- /.fixed navigation -->
	
	<section id="home">
		<div class="container">
			<div class="row">
				<div class="col-xs-12">
					<div class="mouse"></div>
					<h1>ScrollSpy</h1>
					<h4>by Boomer</h4>
				</div><!-- /.col -->
			</div><!-- /.row -->
			<div class="row">
				<div class="col-xs-10 col-xs-offset-1 col-sm-8 col-sm-offset-2">
					<p>Best implementation of Bootstraps Scroll Spy for animated scrolling and page location</p>
				</div><!-- /.col -->
			</div><!-- /.row -->
			<div class="row">
				<div class="col-xs-12">
					<a class="tutorials-link" href="" role="button">Watch Videos</a>
				</div>
			</div>
		</div><!-- /.container -->
	</section><!-- /#home -->
	
	<section id="about">
		<div class="container">
			<div class="row">
				<div class="col-xs-12">
					<div class="section-header">
						About
					</div>
				</div><!-- /.col -->
			</div><!-- /.row -->	
			<div class="row">
				<div class="col-xs-10 col-xs-offset-1 col-sm-8 col-sm-offset-2">
					<p>ScrollSpy.js highlights page position by applying an 'active' class to the Navigation link within a Bootstrap nav component. It does this by monitoring the #target element of the nav link within the window, waiting for it to reach a given 'Y' position, usually zero.</p>
						
						<p><highlight>This example</highlight> demonstrates some rich, additional features including <strong>animated scrolling</strong>, <strong>focus events</strong> as well as how to offset with a fixed navigation bar.</p>
					
					<p>It also shows how to ensure that the 'last' #target element is able to scroll to the top for a better user experience (UX)</p>					
				</div><!-- /.col -->
			</div><!-- /.row -->
		</div><!-- /.container -->
	</section><!-- /#about -->	
	
	<section id="demo">
		<div class="container">
			<div class="row">
				<div class="col-xs-12">
					<div class="section-header">
						Demo
					</div>
				</div><!-- /.col -->
			</div><!-- /.row -->	
			<div class="row">
				<div class="video-roll--container col-xs-12">
					<ul class="video-roll">
						<li><a href="https://youtu.be/kLiMpaMKal8" target="_blank"></a></li>
						<li><a href="https://youtu.be/aVFYHGtf6So" target="_blank"></a></li>
						<li><a href="https://youtu.be/OKxASY7ABfs" target="_blank"></a></li>
					</ul>				
				</div><!-- /.col -->
			</div><!-- /.row -->
			<div class="row">
				<div class="col-xs-12 text-center">		
					<a class="tutorials-link" href="https://www.youtube.com/channel/UCydykDsTWRIVnxKHW3SHPQA" role="button">Watch Videos</a>	
					<h4>Check out my YouTube tutorials</h4>
				</div><!-- /.col -->
			</div><!-- /.row -->
		</div><!-- /.container -->
	</section>	

	<section id="features">
		<div class="container">
			<div class="row">
				<div class="col-xs-12">
					<div class="section-header">
						Features
					</div>
				</div><!-- /.col -->
			</div><!-- /.row -->
			
			<div class="row">
				<div class="feature-container col-xs-12">
					<div class="row">
						<div class="feature col-xs-8 col-xs-offset-2 col-sm-4 col-sm-offset-0 text-center">
							<svg class="lnr lnr-magic-wand"><use xlink:href="#lnr-magic-wand"></use></svg>
							<h4>Animated Scroll</h4>
							<p>Smooth, animated scroll between navigation links</p>
						</div><!-- /.feature -->

						<div class="feature col-xs-10 col-xs-offset-1 col-sm-4 col-sm-offset-0 text-center">
							<svg class="lnr lnr-map-marker"><use xlink:href="#lnr-map-marker"></use></svg>
							<h4>Page Location</h4>
							<p>Track page locations when scrolling</p>
						</div><!-- /.feature -->

						<div class="feature col-xs-10 col-xs-offset-1 col-sm-4 col-sm-offset-0 text-center">
							<svg class="lnr lnr-bullhorn"><use xlink:href="#lnr-bullhorn"></use></svg>
							<h4>Focus Events</h4>
							<p>Draw user attention to navigated sections</p>
						</div><!-- /.feature -->
					</div><!-- /.row -->
				</div><!-- /.feature-container -->

			</div><!-- /.row -->
		</div><!-- /.container -->
		
		<div class="container-fluid">
			<div class="banner row">
				<div class="banner-child bc-left col-sm-6">
					<div class="section-sub-header">
						Animated Scroll
					</div>
					
					<div class="animated-scroll">
						<div class="scroll-header">
							<div class="scroll-nav sn-1"></div>
							<div class="scroll-nav sn-2"></div>
							<div class="scroll-nav sn-3"></div>
							<svg class="cursor" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" enable-background="new 0 0 24 24" id="Layer_1" version="1.0" viewBox="0 0 24 24" xml:space="preserve"><path d="M7,2l12,11.2l-5.8,0.5l3.3,7.3l-2.2,1l-3.2-7.4L7,18.5V2"/></svg>
						</div><!-- /.scroll-header -->
						
						<div class="scroll-body">
							<div class="scroll-child sc-1"></div>
							<div class="scroll-child sc-2"></div>		
							<div class="scroll-child sc-3"></div>
							<div class="scroll-child sc-back-to-top"></div>
						</div><!-- /.scroll-body -->
					</div><!-- /.animated scroll -->
				</div><!-- /.banner-child -->
				
				<div class="banner-child bc-right col-sm-6">
					<div class="section-sub-header">
						Focus Events | UX
					</div>			
					
					<div class="focus-events">
						<div class="scroll-header">
							<div class="scroll-nav sn-1"></div>
							<div class="scroll-nav sn-2"></div>
							<svg class="cursor" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" enable-background="new 0 0 24 24" id="Layer_1" version="1.0" viewBox="0 0 24 24" xml:space="preserve"><path d="M7,2l12,11.2l-5.8,0.5l3.3,7.3l-2.2,1l-3.2-7.4L7,18.5V2"/></svg>
						</div><!-- /.scroll-header -->
						
						<div class="scroll-body">
							<div class="scroll-child sc-1">
								<div class="header"></div>
								<div class="sub-header"></div>
								<div class="body"></div>
								<div class="body"></div>
								<div class="body"></div>
							</div>
							<div class="scroll-child sc-2">
								<div class="header"></div>
								<div class="sub-header"></div>
								<div class="body"></div>
								<div class="body"></div>
								<div class="body"></div>							
							</div>
						</div><!-- /.scroll-body -->
					</div><!-- /.animated scroll -->				
				</div><!-- /.banner-child -->
			</div><!-- /.row -->
		</div><!-- /.container-fluid -->
	</section><!-- /#features -->
	
	<section id="howto">
		<div class="container">
			<div class="row">
				<div class="col-xs-12">
					<div class="section-header">
						How To
					</div>
				</div><!-- /.col -->
			</div><!-- /.row -->
			
			<div class="row">
				<div class="col-xs-12">			
					<div class="section-sub-header">
						Offest a Fixed Navbar
					</div>
				</div><!-- /.col -->
			</div><!-- /.row -->
			
<div class="row">
	<div class="col-xs-12">
<figure class="highlight"><pre><code class="language-html" data-lang="html"><span class="nt">&lt;body</span> <span class="na">data-spy=</span><span class="s">"scroll"</span> <span class="na">data-target=</span><span class="s">"#navbar-example"</span> <span class="na">data-offset=</span><span class="s">"70"</span><span class="nt">&gt;</span>
  ...
<span class="nt">&lt;/body&gt;</span></code></pre>
</figure>	
	</div><!-- /.col -->
</div><!-- /.row -->		

<div class="row">
	<div class="col-xs-12">
<figure class="highlight"><pre><code class="language-js" data-lang="js"><span class="nx">$</span><span class="p">(</span><span class="s1">'body'</span><span class="p">).</span><span class="nx">scrollspy</span><span class="p">({</span>
  <span class="na">offset</span><span class="p">:</span> <span class="s1">offsetHeight</span> <span class="c1">/*A numeric representing pixel count*/</span>
<span class="p">})</span></code></pre>
</figure>	
	</div><!-- /.col -->
</div><!-- /.row -->				

			<div class="row">
				<div class="col-xs-12">			
					<div class="section-sub-header">
						Ensure last #target scrolls to top
					</div>
					<p>A common problem I see with scrollspy implementations is when the last navigation target doesn't navigation to the top of the screen. This causes issues for scrollspy as well as confusing the user if the target they clicked is half way down the page.</p>
					<p>The problem is simple, the document isn't long enough to allow it to scroll to the top.</p>
					
					<p>A simple solution is to dynamically add padding-bottom to the body via JQuery, which increases the height to the pixel perfect minimum. We need to do this both at render/page load and if the window is resized. The below code is a simplified and calculates the height of all sibling elements (after the target) to calculate</p>
					
					
				</div><!-- /.col -->
			</div><!-- /.row -->

<div class="row">
	<div class="col-xs-12">
<figure class="highlight"><pre><code class="language-js" data-lang="js">
<span class="kd">var</span> <span class="vg">height</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="s1">'#targetId'</span><span class="p">).</span><span class="nx">innerHeight</span><span class="p">(</span><span class="p">)</span>
<span class="kd">var</span> <span class="vg">windowHeight</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="s1">window</span><span class="p">).</span><span class="nx">height</span><span class="p">(</span><span class="p">)</span>
<span class="kd">var</span> <span class="vg">navHeight</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="s1">'nav.navbar'</span><span class="p">).</span><span class="nx">innerHeight</span><span class="p">(</span><span class="p">)</span>
<span class="kd">var</span> <span class="vg">siblingHeight</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="s1">'#targetId'</span><span class="p">).</span><span class="nx">nextAll</span><span class="p">(</span><span class="p">).</span><span class="nx">innherHeight</span><span class="p">(</span><span class="p">)</span>

<span class="nx">if</span><span class="p">(</span><span class="nx">height </span><span class="nx">&lt;</span><span class="nx"> windowHeight</span><span class="p">)</span><span class="p">(</span><span class="p">{</span>
  <span class="nx">$</span><span class="p">(</span><span class="s1">'body'</span><span class="p">).</span><span class="nx">css</span><span class="p">(</span><span class="na">"padding-bottom"</span><span class="p">,</span> <span class="nx">windowHeight</span><span class="p">-</span><span class="nx">navHeight</span><span class="p">-</span><span class="nx">height</span><span class="p">-</span><span class="nx">siblingHeight</span> <span class="p">+</span> <span class="p">"</span><span class="s1">px</span><span class="p">"</span><span class="p">)</span>
<span class="p">}</span>	
</code></pre>
</figure>	
	</div><!-- /.col -->
</div><!-- /.row -->		
		</div><!-- /.container -->
	</section>
	<footer>
		<div class="container">
			<div class="row">
				<div class="col-xs-12">
					<h4>
						This is a footer
					</h4>
				</div>
			</div>
		</div>	
	</footer>
	<a href="#home" role="button" class="scrollTop">
		<svg class="lnr lnr-chevron-up"><use xlink:href="#lnr-chevron-up"></use></svg>
	</a>
</body>
              
            
!

CSS

              
                // Variables ==========================
$font-family: "Open Sans", Helvetica, Arial, sans-serif

$primary: #907dda
$primary-dark: darken(#907dda,4%)
$accent: #e5e4ea
$font-light: #e7e6f1
$font-dark: #333
$grey: #BDC4D0
$background-light: #F3F4F8
$background-dark: #2F3032
$border-light: darken($background-light, 2%)
$border-dark: darken($background-dark, 2%)

// Mixins =============================
=absolute($top, $left, $right, $bottom)
	position: absolute
	top: $top
	left: $left
	right: $right
	bottom: $bottom

=translate($x,$y)
	-webkit-transform: translate($x,$y)
	-webkit-transform: translate3d($x,$y,0)
	-ms-transform: translate($x,$y)
	-ms-transform: translate3d($x,$y,0)
	transform: translate($x,$y)
	transform: translate3d($x,$y,0)

// Base ===============================

div,h1,h2,h3,h4,h5,h6,p
	font-family: $font-family

html
	height: 100%
	font:
		size: 14px
	
	@media (min-width: 768px)
		font:
			size: 16px
	
body
	position: relative
	min-height: 100%
	background: $background-dark
	box-shadow: inset 0 0 200px rgba(0,0,0,0.1), inset 0 0 20px rgba(0,0,0,0.08)

// prevent margin collapse
h1,h2,h3,h4,h5,h6
	margin-top: 0

h1	
	font:
		size: 2rem
		weight: 300
	line-height: 2.5rem
	letter-spacing: 4px

	@media (min-width: 768px)
		font:
			size: 2.375rem
		line-height: 2.75rem
	
p
	margin-bottom: 20px
	font:
		size: 1rem
		weight: 300
	letter-spacing: 0.5px
	line-height: 1.6rem

	highlight
		font:
			weight: 600
			// size: 1.2rem
		color: $primary
	
	&:last-child
		margin-bottom: 0
	
code
	font: 
		size: 0.875rem
	
// Styles ================================

nav.navbar
	height: 70px
	background: transparent
	border: none
	transition: background-color 0.3s
	will-change: transform
	
	// Class based state
	&.show-color
		background: white
		box-shadow: 0px 6px 16px -2px rgba(0,0,0,0.3)
	
		.navbar-home
			visibility: visible
			+translate(100%,0)
			opacity: 1

.navbar-home
	visibility: hidden
	display: flex
	flex:
		direction: column
	align-items: center
	justify-content: center
	+absolute(0px,0px,null,null)
	height: 70px
	width: 10%
	+translate(100%,-50%)
	transition: transform 0.2s ease-in, opacity 0.2s ease-in, visibilit 0.2s ease-in
	opacity: 0
	
	svg
		width: 20px
		height: 20px
		fill: $grey
	
.navbar-brand
	position: relative
	height: 70px
	padding: 0 28px 0 15px
	padding: 0 28px 0 45px
	font:
		size: 20px
		weight: 300
	line-height: 80px
	letter-spacing: 1px
	color: $font-light
	vertical-align: middle

	// Pseudo Elements --------
	&:before
		display: block
		content: ''
		+absolute(50%,0,null,null)
		height: 44px
		width: 28px
		background: none
		border: 2px solid white
		border-radius: 16px
		+translate(0,-50%)

	// CSS States ======
	&:hover, &:focus
		color: white

	i.material-icons
		position: absolute
		top: 50%
		right: 0
		transform: translate(0,-50%)

.navbar-toggle
	height: 70px
	margin: 0
	padding: 0 20px
	color: white
	border: none

	&.collapsed
		color: $font-light

.navbar-collapse
	@media (max-width: 767px)
		background: $accent
	
ul.navbar-nav
	color: $font-dark
	
	@media (min-width: 768px)
		display: flex
		flex:
			direction: row
		align-items: center
		justify-content: center
		float: none
		text-align: center
		color: $grey

	> li
		@media (min-width: 768px)
			float: none
			display: inline-block
	
		> a
			padding: 0 20px
			font:
				size: 14px
				weight: 400
			text:
				transform: uppercase
			line-height: 70px
			letter-spacing: 1px
			color: currentColor
	
			// CSS States ========
			&:hover
				background: rgba(0,0,0,0.15)

			&:focus
				background: rgba(0,0,0,0.20)
	
	> li.active
		@media (max-width: 767px)
			background: rgba(0,0,0,0.10)
	
		@media (min-width: 768px)
			color: $primary
			background: rgba(255,255,255,0.15)
			box-shadow: inset 0 -3px 0 0 $primary
	
		> a
		
			// CSS States ========
			&:hover, &:focus
				background: none

section
	position: relative
	// min-height: 80vh
	padding: 30px 0 50px
	background: white

	&:last-of-type
		min-height: 20vh

	&.focus
		.page-header
			color: $primary
	
			&:after
				visibility: visible
				opacity: 1
	
.section-header
	position: relative
	margin-bottom: 40px
	font:
		size: 26px
		weight: 400
	color: #333
	text:
		align: center
	line-height: 60px
	letter-spacing: 1px
	
	&:after
		content: ''
		display: block
		+absolute(null,50%,null,0)
		width: 70px
		height: 2px
		background: $primary
		+translate(-50%,0)

.section-sub-header
	position: relative
	margin-bottom: 40px
	font:
		size: 22px
		weight: 300
	text:
		align: center
	line-height: 60px
	letter-spacing: 1px

.banner
	.banner-child
		padding: 25px 15px
		height: 500px
	
	.bc-left
		color: $font-light
		background: $primary
	
	.bc-right
		color: $font-dark
		background: $background-light

.page-header
	position: relative
	margin-top: 0
	margin-bottom: 50px
	letter-spacing: 1px
	color: $font-dark
	transition: color 0.2s ease-in

	// CSS Pseudo elements ==========
	&:after
		visibility: hidden
		display: block
		content: "Boom!!! got your focus now ay :-)"
		position: absolute
		top: 100%
		padding-top: 25px
		font:
			size: 16px
		transition: opacity 0.2s ease-in, visibility 0.2s ease-in
		opacity: 0
	
footer
	min-height: 240px
	position: relative
	padding: 50px 0 150px
	font:
		size: 22px
	text:
		align: center
	letter-spacing: 1px
	color: $font-light
	background: $background-dark

a.tutorials-link
	display: block
	position: relative
	width: 180px
	margin: 0 auto 25px
	padding: 15px 0
	font:
		size: 0.875rem
		weight: 600	
	text:
		align: center
		transform: uppercase
		decoration: none
	letter-spacing: 2px
	color: $primary	
	border: 2px solid $primary
	transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease

	// CSS state ----
	&:hover
		color: $font-light
		background: $primary
		box-shadow: 0 6px 12px -4px rgba(0,0,0,0.3)
	
.scrollTop
	display: flex
	flex:
		direction: column
	align-items: center
	justify-content: center
	position: fixed
	right: 20px
	bottom: 20px
	width: 44px
	height: 44px
	text:
		decoration: none
	padding: 0
	color: $font-light
	background: $primary
	border: none
	border-radius: 100%
	box-shadow: 2px 2px 12px rgba(0,0,0,0.2)
	+translate(0,80px)
	transition: transform 0.2s ease-in
	opacity: 0.7

	&:hover
		color: $font-light
		opacity: 1

	&.show-button
		+translate(0,0)

	svg
		width: 20px
		height: 20px
		fill: currentColor

#home
	display: flex
	flex:
		direction: column
	align-items: center
	justify-content: center
	position: relative
	min-height: 400px
	height: 60vh
	padding: 50px 0
	
	// Media queries ----
	@media (min-width: 768px)
		height: 80vh
		min-height: 640px
	
	&:before
		content: ''
		display: block
		position: fixed
		top: 0
		left: 0
		width: 100%
		min-height: 400px
		height: 60vh
		background:
			image: url('https://hd.unsplash.com/photo-1457365050282-c53d772ef8b2') //Old version backup
			image: url('https://images.unsplash.com/photo-1457365050282-c53d772ef8b2')
			size: cover
			position: center bottom	
		will-change: transform
		z-index: 0
	
		// Media queries ----
		@media (min-width: 768px)
			height: 80vh
			min-height: 640px	
	
	// Pseudos ----
	&:after
		content: ''
		display: block
		+absolute(0,0,0,0)
		background: 
			image: radial-gradient(transparent, rgba(0,0,0,0.4))
		z-index: 0
	
	/* Layering due to Psuedo overlay */
	.container
		z-index: 1
	
	.mouse
		position: relative
		width: calc(28px * 2)
		height: calc(44px * 2)
		margin: 0 auto 20px
		background: none
		border: 2px solid white
		border-radius: calc(16px * 2) 
		z-index: 1
	
		// Media queries ----
		@media (min-width: 768px)
			width: calc(28px * 4)
			height: calc(44px * 4)
			margin: 0 auto 30px
			background: none
			border: 2px solid white
			border-radius: calc(16px * 4) 
	
		&:after
			display: block
			content: ''
			+absolute(10px,50%,null,null)
			width: calc(5px * 2)
			height: calc(5px * 2)
			background: none
			border: 2px solid white
			border-radius: 100%
			animation:
				name: scrollWheel
				duration: 1.4s
				fill-mode: forwards
				iteration-count: infinite
				timing-function: ease
			will-change: transform
	
			// Media queries ----
			@media (min-width: 768px)	
				+absolute(25px,50%,null,null)
				width: calc(5px * 4)
				height: calc(5px * 4)	
	h1
		text:
			align: center
			shadow: 0px 0px 20px rgba(0,0,0,0.5)	
		color: $font-light

	h4
		font:
			size: 14px
			weight: 600
		text:
			align: center	
			transform: uppercase
			shadow: 0px 0px 20px rgba(0,0,0,0.5)
		letter-spacing: 2px
		color: $primary
	
	p
		margin: 0
		padding: 25px 0
		text:
			align: center	
			shadow: 0px 0px 40px rgba(0,0,0,0.5), 1px 1px 3px rgba(0,0,0,0.3)
		line-height: 26px
		color: $font-light	
	
#about
	p
		text:
			align: center
		color: #333
	
#demo	
	background: $background-light

	h4
		margin-bottom: 20px
		margin-bottom: 0px
		font:
			size: 0.875rem
			weight: 400	
		text:
			transform: uppercase
		line-height: 24px
		letter-spacing: 1px
		color: $grey

	.video-roll--container
		padding: 0
	
		@media (min-width: 768px)
			padding: 0 15px
	
	.video-roll
		display: flex
		flex:
			direction: row
			wrap: wrap
		align-items: center
		position: relative
		width: 100%
		max-width: 1000px 
		// height: 240px
		margin: 0 auto 80px
		padding: 25px 0 0
		list-style: none
	
		@media (min-width: 768px)
			margin: 0 auto 120px
	
		// Pseudo -------
		&:after
			content: ''
			display: block
			width: 30%
			height: 14px
			margin: -90px auto 0
			margin: -20px auto 0
			background: transparent
			border-radius: 50%
			box-shadow: 0 50px 40px rgba(0,0,0,0.4)
	
			@media (min-width: 768px)
				margin: 0px auto 0
	
		li
			display: flex
			flex:
				direction: column
				grow: 0
				shrink: 1
			align-items: stretch
			align-content: stretch
			position: relative
			background: transparent
	
			// Pseudo -------------
	
			&:before
				content: ''
				display: block
				padding-top: 56.25%
	
			&:after
				content: ''
				display: block
				+absolute(null,50%,null,0px)
				width: 60%
				height: 14px
				margin: -90px auto 0
				background: transparent
				border-radius: 50%
				box-shadow: 0 50px 40px rgba(0,0,0,0.25)
				+translate(-50%,0)
	
			// nth Child -----------
	
			&:first-child
				visibility: hidden
				flex:
					basis: 10%
				+translate(50%,0)
				opacity: 0
				
				@media (min-width: 768px)
					visibility: visible
					flex:
						basis: 30%	
					opacity: 1
				
				a
					background:
						image: url('https://i.ytimg.com/vi/kLiMpaMKal8/maxresdefault.jpg')			
					transform-origin: left center

			&:nth-child(2)
				flex:
					basis: 80%		
				z-index: 2

				@media (min-width: 768px)
					flex:
						basis: 40%	
		
				&:after
					display: none
		
				a
					flex:
						grow: 1
					background:
						image: url('https://i.ytimg.com/vi/aVFYHGtf6So/maxresdefault.jpg')			
					transform-origin: center center
	
			&:last-child
				visibility: hidden
				flex:
					basis: 10%		
				+translate(-50%,0)
				opacity: 0

				@media (min-width: 768px)
					visibility: visible
					flex:
						basis: 30%	
					opacity: 1
		
				a
					background:
						image: url('https://i.ytimg.com/vi/OKxASY7ABfs/maxresdefault.jpg')			
					transform-origin: right center
		
			a
				+absolute(0,0,0,0)
				background:
					// image: url('https://i.ytimg.com/vi/kLiMpaMKal8/maxresdefault.jpg')
					size: cover
					position: center center
				// box-shadow: 0px 6px 10px -2px rgba(0,0,0,0.2)
				+translate(0,0)
				transition: transform 0.2s ease-out
				will-change: transform
		
				&:hover
					+translate(0,-4px)
				
	
#features
	padding-bottom: 0
	color: #333

	.feature-container
		margin-bottom: 80px
	
		@media (min-width: 768px)
			margin-bottom: 80px

	.feature
		padding: 25px 0
	
		@media (min-width: 768px)
			padding: 50px 0
	
		svg
			width: 40px
			height: 40px
			margin-bottom: 15px
			fill: currentColor
	
			@media (min-width: 768px)
				width: 60px
				height: 60px
		
		h4
			font:
				size: 14px
				weight: 600	
			text:
				transform: uppercase
			line-height: 24px
			letter-spacing: 2px
			color: $primary
	
		p
			font:
				size: 14px
				weight: 300		
			color: $grey
			letter-spacing: 1px
	
	.animated-scroll
		display: flex
		flex:
			direction: column
		position: relative
		width: 80%
		max-width: 450px
		height: 315px
		margin: 0 auto
		border: 4px solid $primary-dark
		border-bottom-color: transparent
		border-radius: 6px
		overflow: hidden
		
		.scroll-header
			display: flex
			flex:
				direction: row
				grow: 0
				shrink: 0
				basis: 60px
			align-items: center
			justify-content: center
			background: $primary-dark
	
			.scroll-nav
				width: 15%
				height: 8px
				margin-right: 5%
				border-radius: 4px
		
			.sn-1
				animation:
					name: scrollColor-1
					iteration-count: infinite
					timing-function: linear
					duration: 5s
					// direction: alternate
					fill-mode: forwards	

			.sn-2
				animation:
					name: scrollColor-2
					iteration-count: infinite
					timing-function: linear
					duration: 5s
					// direction: alternate
					fill-mode: forwards	
		
			.sn-3
				margin-right: 0
				animation:
					name: scrollColor-3
					iteration-count: infinite
					timing-function: linear
					duration: 5s
					// direction: alternate
					fill-mode: forwards		
	
			svg.cursor
				+absolute(28px,50%,null,null)
				width: 20%
				height: 20px
				animation:
					name: scrollCursor
					iteration-count: infinite
					timing-function: linear
					duration: 5s
					fill-mode: forwards
				z-index: 2
	
		.scroll-body
			display: flex
			flex:
				direction: column
				grow: 1
				shrink: 1
				basis: auto
			padding-top: 20px
			overflow: hidden
	
		.scroll-child
			flex:
				grow: 0
				shrink: 0
				basis: 150px
			width: 90%
			margin: 0 auto 20px
			fill: lighten($font-dark, 5%)
			background: rgba(255,255,255,0.2)
			border-radius: 4px
			animation:
				name: scrollDemo
				iteration-count: infinite
				timing-function: linear
				duration: 5s
				fill-mode: forwards
		
		.sc-back-to-top
			flex:
				basis: 40px
			width: 40px
			margin: 0 auto
			border-radius: 100%
			animation:
				name: scrollBackToTop
				iteration-count: infinite
				timing-function: linear
				duration: 5s
				fill-mode: forwards	
			z-index: 0
	
			
	.focus-events
		display: flex
		flex:
			direction: column
		position: relative
		width: 80%
		max-width: 450px
		height: 315px
		margin: 0 auto
		border: 4px solid darken($background-light, 4%)
		border-bottom-color: transparent
		border-radius: 6px
		overflow: hidden
		
		.scroll-header
			display: flex
			flex:
				direction: row
				grow: 0
				shrink: 0
				basis: 60px
			align-items: center
			justify-content: center		
			background: darken($background-light, 4%)
	
			.scroll-nav
				width: 15%
				height: 8px
				margin-right: 5%
				border-radius: 4px	
				// background: darken($background-light, 12%)
		
			.sn-1
				animation:
					name: focusColor-1
					iteration-count: infinite
					timing-function: linear
					duration: 4s
					fill-mode: forwards	
		
			.sn-2
				animation:
					name: focusColor-2
					iteration-count: infinite
					timing-function: linear
					duration: 4s
					fill-mode: forwards			
	
			svg.cursor
				+absolute(28px,50%,null,null)
				width: 20%
				height: 20px
				animation:
					name: focusCursor
					iteration-count: infinite
					timing-function: linear
					duration: 4s
					fill-mode: forwards	
				z-index: 2
	
		.scroll-body
			display: flex
			flex:
				direction: column
				grow: 1
				shrink: 1
				basis: auto
			padding-top: 20px
			overflow: hidden
	
		.scroll-child
			flex:
				grow: 0
				shrink: 0
				basis: 150px
			width: 90%
			margin: 0 auto 20px
			padding: 10% 5%
			background: rgba(0,0,0,0.05)
			background: darken($background-light, 2%)
			border-radius: 4px
			animation:
				name: focusDemo
				iteration-count: infinite
				timing-function: ease-in
				duration: 4s
				fill-mode: forwards	
	
			.header
				height: 14px
				width: 50%
				margin: 0 auto 8px
				border-radius: 8px
				background: darken($background-light, 7%)

			.sub-header
				height: 10px
				width: 40%
				margin: 0 auto 22px
				border-radius: 6px
				background: darken($background-light, 5%)

			.body
				width: 70%
				height: 8px
				margin: 0 auto 8px
				background: darken($background-light, 6%)
		
		.sc-2
			.header
				animation:
					name: focusHeaderColor
					iteration-count: infinite
					timing-function: linear
					duration: 4s
					fill-mode: forwards	
		
#howto
		
@keyframes scrollWheel
	from
		+translate(-50%,0)
		opacity: 1

	to
		+translate(-50%,20px)
		opacity: 0	
	
	@media (min-width: 768px)
		from
			+translate(-50%,0)
			opacity: 1

		to
			+translate(-50%,40px)
			opacity: 0
	
@keyframes scrollDemo
	from, 30%
		+translate(0,0px)	
	40%, 60%
		+translate(0,-170px)
	70%, 90%
		+translate(0,-340px)
	to
		+translate(0,0px)
	
@keyframes scrollColor-1
	from, 39.9%
		background: rgba(255,255,255,0.7)	
	40%, to
		background: $primary
	
@keyframes scrollColor-2
	from, 24%
		background: $primary
	24.2%, 28%
		background: lighten($primary, 10%)
	28.2%, 39.9%
		background: $primary
	40%, 69.9%
		background: rgba(255,255,255,0.7)
	70%, to
		background: $primary
	
@keyframes scrollColor-3
	from, 53.8%
		background: $primary
	54%, 57.8%
		background: lighten($primary, 10%)
	58%, 69.9%
		background: $primary
	70%, 99.9%
		background: rgba(255,255,255,0.7)
	to
		background: $primary	
	
@keyframes scrollBackToTop
	from, 30%
		+translate(0,0px)	
		background: rgba(255,255,255,0.2)
	40%, 60%
		+translate(0,-170px)
	70%, 90%
		+translate(0,-340px)
	84.8%
		background: rgba(255,255,255,0.2)
	85%, 88.8%
		background: rgba(255,255,255,0.5)
	89%
		background: rgba(255,255,255,0.2)
	to
		+translate(0,0px)
		background: rgba(255,255,255,0.2)	
	
@keyframes scrollCursor
	from
		+translate(-50%, 236px)
	15%, 30% 
		+translate(-50%,0)
	35%, 65%
		+translate(50%,0)
	78%, to
		+translate(-50%, 236px)

@keyframes focusDemo
	from, 30%
		+translate(0,0px)
	40%, to
		+translate(0,-170px)
	
@keyframes focusColor-1
	from, 39.9%
		background: darken($background-light,10%)	
	40%, to
		background: $background-light

@keyframes focusColor-2
	from, 24%
		background: $background-light
	24.2%, 28%
		background: darken($background-light,7%)
	28.2%, 40%
		background: $background-light
	40.1%, to
		background: darken($background-light,10%)
	
@keyframes focusHeaderColor
	from, 40%
		background: darken($background-light, 7%)	
	40.2%, 70%
		background: $primary
	75%, to
		background: darken($background-light, 7%)
	
@keyframes focusCursor
	from
		+translate(-50%, 200px)
		opacity: 0
	10%
		opacity: 1
	15%, 30%
		opacity: 1
		+translate(-10%, 0)
	45%, to
		opacity: 0
	
.highlight 
	padding: 9px 14px
	margin-bottom: 14px
	background-color: #f7f7f9
	border: 1px solid #e1e1e8
	border-radius: 4px

.highlight pre 
	padding: 0
	margin-top: 0
	margin-bottom: 0
	word-break: normal
	white-space: nowrap
	background-color: transparent
	border: 0

.highlight pre code 
	font-size: inherit
	color: #333 /* Effectively the base text color */

.highlight pre code:first-child
	display: inline-block
	padding-right: 45px
	
              
            
!

JS

              
                $(document).ready(function(){
	
	// Scrollspy initiation
	$('body').scrollspy({ 
		target: '#scroll-spy',
		offset: 70
	});

	// On render, adjust body padding to ensure last Scroll target can reach top of screen
	var height = $('#howto').innerHeight();
	var windowHeight = $(window).height();
	var navHeight = $('nav.navbar').innerHeight();
	var siblingHeight = $('#howto').nextAll().innerHeight();


	if(height < windowHeight){
		$('body').css("padding-bottom", windowHeight-navHeight-height-siblingHeight + "px");
	}

	// On window resize, adjust body padding to ensure last Scroll target can reach top of screen
	$(window).resize(function(event){
		var height = $('#howto').innerHeight();
		var windowHeight = $(window).height();
		var navHeight = $('nav.navbar').innerHeight();
		var siblingHeight = $('#howto').nextAll().innerHeight();
		
		
		if(height < windowHeight){
			$('body').css("padding-bottom", windowHeight-navHeight-height-siblingHeight + "px");
		}
	});
	
	$('nav.navbar a, .scrollTop').click(function(event){
		// Make sure this.hash has a value before overriding default behavior
		if (this.hash !== "") {
			// Prevent default anchor click behavior
			event.preventDefault();

			// Store hash (#)
			var hash = this.hash;
			
			// Ensure no section has relevant class
			$('section').removeClass("focus");

			// Add class to target
			$(hash).addClass("focus");

			// Remove thy class after timeout
			setTimeout(function(){
				$(hash).removeClass("focus");
			}, 2000);			
			
    // Using jQuery's animate() method to add smooth page scroll
    // The optional number (800) specifies the number of milliseconds it takes to scroll to the specified area (the speed of the animation)
			$('html, body').animate({
				scrollTop: $(hash).offset().top - 69
			}, 600, function(){
				
				// Add hash (#) to URL when done scrolling (default click behavior)
				window.location.hash = hash;				
			});
					
			// Collapse Navbar for mobile view
			$(".navbar-collapse").collapse('hide');			
		}

	});
	$(window).scroll(function(){
		var scrollPos = $('body').scrollTop();
		if(scrollPos > 0){
			$('.navbar').addClass('show-color');
			$('.scrollTop').addClass('show-button');
		} else{
			$('.navbar').removeClass('show-color');
			$('.scrollTop').removeClass('show-button');
		}
		
	});
});
              
            
!
999px

Console