Code Playground

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <body>
	<nav class="navbar navbar-expand-sm navbar-dark fixed-top bg-dark">
		<div class="container-fluid">
			<ul class="navbar-nav me-auto mb-2 mb-md-0">
				<li class="nav-item">
					<a class="nav-link active" aria-current="page" href="#sunlight">Sunlight</a>
				</li>
				<li class="nav-item">
					<a class="nav-link active" aria-current="page" href="#twilight">Twilight</a>
				</li>
				<li class="nav-item">
					<a class="nav-link active" aria-current="page" href="#midnight">Midnight</a>
				</li>
				<li class="nav-item">
					<a class="nav-link active" aria-current="page" href="#abyss">Abyss</a>
				</li>
				<li class="nav-item">
					<a class="nav-link active" aria-current="page" href="#trench">Trench</a>
				</li>
				<li class="nav-item elements">
					<div class="nav-link active">Items discovered : <span id="elementsNumber">0</span>/27</div>
				</li>
				<li class="showAll nav-item">
					<div id="showAll" class="btn btn-primary nav-link active">Show All</div>
				</li>
				<li class="hideAll nav-item">
					<div id="hideAll" class="btn btn-primary nav-link active">Hide All</div>
				</li>
			</ul>
		</div>
	</nav>
	<div class="sky">
		<div class="main-title row d-flex justify-content-center align-items-center">
			<div class="col-12">
				<div class="d-flex justify-content-center">
					<h1>Scroll to the Abyss</h1>
				</div>
			</div>
			<div class="col-12">
				<div class="d-flex justify-content-center">
					<span>Uncover Hidden Treasures and Marine Wonders</span>
				</div>
			</div>
			<div class="col-12 mt-5">
				<div class="d-flex justify-content-center">
					<div class="mouse-scroll">
						<div class="mouse">
							<div class="wheel"></div>
						</div>
						<div class="arrow"></div>
					</div>
				</div>
			</div>
		</div>
	</div>
	<div class="container deep">
		<div class="row">
			<div class="col">
				<div class="d-flex justify-content-center">
					<div class="container">
						<img id="image" src="https://drive.google.com/thumbnail?id=1w7Jx-qQ1lvv5IGht1FNd7Zbudo6tnlKB&sz=w1000">
						<div class="deep"></div>
						<div class="titles sunlight" id="sunlight">
							<div class="title">
								<h1 class="no-span">Sunlight Zone</h1>
								<span>0-200m</span>
							</div>
						</div>
						<div class="titles twilight" id="twilight">
							<div class="title">
								<h1 class="no-span">Twilight Zone</h1>
								<span>200-1000m</span>
							</div>
						</div>
						<div class="titles midnight" id="midnight">
							<div class="title">
								<h1 class="no-span">Midnight Zone</h1>
								<span>1000-4000m</span>
							</div>
						</div>
						<div class="titles abyss" id="abyss">
							<div class="title">
								<h1 class="no-span">The Abyss</h1>
								<span>4000-6000m</span>
							</div>
						</div>
						<div class="titles trench" id="trench">
							<div class="title">
								<h1 class="no-span">The Trench</h1>
								<span>6000-11000m</span>
							</div>
						</div>
						<div class="species coelacanth">
							<img src="https://drive.google.com/thumbnail?id=1G5YadSz_wl_CDe-1kUHqU_q5BF53DKPe&sz=w1000">
							<div class="description">
								<h2>Coelacanth</h2>
								<p>200m</p>
							</div>
						</div>
						<div class="species japanese-spider-crab">
							<img src="https://drive.google.com/thumbnail?id=1F7RFIoCdd4Q5tsGnYbXZaeOG2tbo2uG6&sz=w1000">
							<div class="description">
								<h2>Japanese Spider Crab</h2>
								<p>610m</p>
							</div>
						</div>
						<div class="species cuttlefish">
							<img src="https://drive.google.com/thumbnail?id=1qqBHqYdVvmWdhmnpWSjeszmUoEGvFB3U&sz=w1000">
							<div class="description">
								<h2>Cuttlefish</h2>
								<p>600m</p>
							</div>
						</div>
						<div class="species sea-angel">
							<img src="https://drive.google.com/thumbnail?id=1CeU-0N9PBCCK9AhvkArvrOEesvkItvPL&sz=w1000">
							<div class="description">
								<h2>Sea Angel</h2>
								<p>600m</p>
							</div>
						</div>
						<div class="species nautilus">
							<img src="https://drive.google.com/thumbnail?id=13fkdRcgc0sWUsoJquKRxHazEOnxEjQVo&sz=w1000">
							<div class="description">
								<h2>Nautilus</h2>
								<p>700m</p>
							</div>
						</div>
						<div class="species cockatoo-squid">
							<img src="https://drive.google.com/thumbnail?id=12vUDJnST5M03vCnexc3rCPOC9OXJG40k&sz=w1000">
							<div class="description">
								<h2>Cockatoo Squid</h2>
								<p>1300m</p>
							</div>
						</div>
						<div class="species headless-chicken-fish">
							<img src="https://drive.google.com/thumbnail?id=1vzbE80rnGLG74sZ2osby8GYZbwbFu9fa&sz=w1000">
							<div class="description">
								<h2>Headless Chicken Fish</h2>
								<p>1000m</p>
							</div>
						</div>
						<div class="species vampire-squid">
							<img src="https://drive.google.com/thumbnail?id=18GWkOeom4Nq5xPswldWrfWmh9AyXCVLY&sz=w1000">
							<div class="description">
								<h2>Vampire Squid</h2>
								<p>1200m</p>
							</div>
						</div>
						<div class="species goblin-shark">
							<img src="https://drive.google.com/thumbnail?id=10Sd73fDfGAJnlpzERRpGfdCHmkK5wA9C&sz=w1000">
							<div class="description">
								<h2>Goblin Shark</h2>
								<p>1300m</p>
							</div>
						</div>
						<div class="species firework-jellyfish">
							<img src="https://drive.google.com/thumbnail?id=1yKKAAxr2pXG4GfFV7DmklOMfOtm6176L&sz=w1000">
							<div class="description">
								<h2>Firework Jellyfish</h2>
								<p>1500m</p>
							</div>
						</div>
						<div class="species dragonfish">
							<img src="https://drive.google.com/thumbnail?id=1IV7cX9A3r1hnQivlw3--6MMZjKbcYHka&sz=w1000">
							<div class="description">
								<h2>Dragonfish</h2>
								<p>1500m</p>
							</div>
						</div>
						<div class="species barreleye-fish">
							<img src="https://drive.google.com/thumbnail?id=1dkkAPYqq-CU5JrghehUnVRo4RT6uADet&sz=w1000">
							<div class="description">
								<h2>Barreleye Fish</h2>
								<p>2500m</p>
							</div>
						</div>
						<div class="species anglerfish">
							<img src="https://drive.google.com/thumbnail?id=1u5zJdTHwjkE-rIJMCT8NqD40qgVDj0WU&sz=w1000">
							<div class="description">
								<h2>Anglerfish</h2>
								<p>2500m</p>
							</div>
						</div>
						<div class="species chimaera">
							<img src="https://drive.google.com/thumbnail?id=1lf3PX4lhWFxjwvd_HJUKKizfqY3BcR4K&sz=w1000">
							<div class="description">
								<h2>Chimaera</h2>
								<p>2600m</p>
							</div>
						</div>
						<div class="species pelican-eel">
							<img src="https://drive.google.com/thumbnail?id=1HAAga3FrhKYkRIplM2x06ZOYxOtRz37d&sz=w1000">
							<div class="description">
								<h2>Pelican Eel</h2>
								<p>3000m</p>
							</div>
						</div>
						<div class="species deepsea-lizardfish">
							<img src="https://drive.google.com/thumbnail?id=1YbWxQGSJiv2qOPJxC3v0Gy0z1gDYXuaI&sz=w1000">
							<div class="description">
								<h2>Deepsea Lizardfish</h2>
								<p>3500m</p>
							</div>
						</div>
						<div class="species titanic">
							<img src="https://drive.google.com/thumbnail?id=1IwppmFLfCXoLxF3HXJq3KQn9TIPLe4cP&sz=w1000">
							<div class="description">
								<h2>Titanic</h2>
								<p>3800m</p>
							</div>
						</div>
						<div class="species atolla-jellyfish">
							<img src="https://drive.google.com/thumbnail?id=1EdVK4XEOr2Q99HuFMd2fUY88vDvLcuTX&sz=w1000">
							<div class="description">
								<h2>Atolla Jellyfish</h2>
								<p>4000m</p>
							</div>
						</div>
						<div class="species fangtooth">
							<img src="https://drive.google.com/thumbnail?id=10qlp51i2dgMnfZ1u0_Ep7I0aIj7Wn32F&sz=w1000">
							<div class="description">
								<h2>Fangtooth</h2>
								<p>5000m</p>
							</div>
						</div>
						<div class="species faceless-fish">
							<img src="https://drive.google.com/thumbnail?id=16BIpdj0C-TIUgcSIyDFyOazA74g9kY3t&sz=w1000">
							<div class="description">
								<h2>Faceless Fish</h2>
								<p>5100m</p>
							</div>
						</div>
						<div class="species grenadier">
							<img src="https://drive.google.com/thumbnail?id=1A_Ex-WmSCJEJTSQOD-GJNTiXtJ9SnIGY&sz=w1000">
							<div class="description">
								<h2>Grenadier</h2>
								<p>7000m</p>
							</div>
						</div>
						<div class="species dumbo-octopus">
							<img src="https://drive.google.com/thumbnail?id=1VI4Tx9veEiDqL-XrrtuHoevDTwiDj4v0&sz=w1000">
							<div class="description">
								<h2>Dumbo Octopus</h2>
								<p>7000m</p>
							</div>
						</div>
						<div class="species comb-jelly">
							<img src="https://drive.google.com/thumbnail?id=1621lwws-oHXXjD6g9aB50hNOomyjkceI&sz=w1000">
							<div class="description">
								<h2>Comb Jelly</h2>
								<p>7210m</p>
							</div>
						</div>
						<div class="species hadal-snailfish">
							<img src="https://drive.google.com/thumbnail?id=1EMoN5woTf0cBul3Gr1uQfNu6QOo_Gmjw&sz=w1000">
							<div class="description">
								<h2>Hadal Snailfish</h2>
								<p>8100m</p>
							</div>
						</div>
						<div class="species sea-pig">
							<img src="https://drive.google.com/thumbnail?id=1nMBs6pWasPlfzH_69iyqZOcbjoB1lXtE&sz=w1000">
							<div class="description">
								<h2>Sea Pig</h2>
								<p>10 000m</p>
							</div>
						</div>
						<div class="species alicella">
							<img src="https://drive.google.com/thumbnail?id=1lSahE2dMVzxEsSVIZiMn43lc22dNsmE-&sz=w1000">
							<div class="description">
								<h2>Alicella</h2>
								<p>10 300m</p>
							</div>
						</div>
						<div class="species deepsea">
							<img src="https://drive.google.com/thumbnail?id=1qKyARbM8fb3XSqAtrC2AOzqU2pf5-lIR&sz=w1000">
							<div class="description">
								<h2>Deepsea Challenger</h2>
								<p>10 898m</p>
							</div>
						</div>
					</div>
				</div>
			</div>
		</div>
	</div>
	<div class="end">
		<div class="main-title row d-flex justify-content-center align-items-center">
			<div class="col-12">
				<div class="d-flex justify-content-center">
					<h1>Thanks</h1>
				</div>
			</div>
			<div class="col-12">
				<div class="d-flex justify-content-center">
					<span>Credits:</span>
				</div>
			</div>
			<div class="col-12">
				<div class="d-flex justify-content-center">
					<span>Beach: <a href="https://freepik.com">Freepik</a> / Items: <a href="https://commons.wikimedia.org/wiki/Main_Page">Wikimedia</a></span>
				</div>
			</div>
			<div class="col-12 mt-5">
				<div class="d-flex justify-content-center">
					<div class="mouse-scroll">
						<div class="mouse">
							<div class="wheel"></div>
						</div>
						<div class="arrow"></div>
					</div>
				</div>
			</div>
		</div>
	</div>
	<div class="measures">
		<div id="distance">
			Depth: 0m
		</div>
		<div id="pressure">Pressure: 101325 Pa</div>
	</div>
	<div id="custom-cursor">
		<img src="img/submarine1.png" alt="Submarine" id="submarine">
	</div>
	<div id="custom-pointer-cursor">
		<img src="img/pointer1.png" alt="Pointer" id="pointer">
	</div>
</body>
</body>
</html>

@charset "UTF-8";
@import url(https://fonts.googleapis.com/css?family=Nunito+Sans:300,400,600,700,800);
*,
:after,
:before {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
body {
	background: #f5f5f5;
	font-family: "Plus Jakarta Sans", sans-serif;
	background: black;
}

h1,
h2,
h3,
h4,
h5 {
	font-weight: 700;
	color: #fff;
}

#navbarNav {
	background: transparent;
	margin-left: 2em;
}

.border-bottom {
	border-bottom: 1px solid #191919 !important;
}

.gallery {
	display: flex;
	justify-content: center;
	margin-bottom: 20px;
}

.container {
	max-width: 100vw;
	position: relative;
	margin-bottom: 500px;
}

.filter-range {
	display: flex;
	flex-direction: column;
	align-items: center;
}

#svg-filters {
	position: absolute;
}

.card {
	margin-top: 24px;
	margin-bottom: 24px;
	border-radius: 24px;
	padding: 24px;
	box-shadow: rgba(0, 0, 0, 0.1) 0px 10px 15px -3px,
		rgba(0, 0, 0, 0.05) 0px 4px 6px -2px;
	border: none;
}

#search {
	border-radius: 24px;
	border: none;
	padding: 12px;
	float: right;
	box-shadow: rgba(0, 0, 0, 0.1) 0px 10px 15px -3px,
		rgba(0, 0, 0, 0.05) 0px 4px 6px -2px;
}

#image {
	position: absolute;
	top: 0;
	width: 100%;
	height: 11000px;
	object-position: center bottom;
	margin-bottom: 2000px;
	z-index: -1;
}

.deep {
	cursor: url(https://drive.google.com/thumbnail?id=14ZwyOC0zZQLJwVVwNjAo-m4F7E44-bV5&sz=w96)
			48 48,
		auto;
}

.species img {
	cursor: url(https://drive.google.com/thumbnail?id=1w138J4r1-wCAGFIGBkOo9Ap7ObaO0t4f&sz=w96)
			48 48,
		auto;
}

.card h5 {
	margin-bottom: 24px;
}

.buttons {
	margin-bottom: 24px;
}

.btn {
	border-radius: 24px;
	box-shadow: rgba(0, 0, 0, 0.1) 0px 10px 15px -3px,
		rgba(0, 0, 0, 0.05) 0px 4px 6px -2px;
}

.measures {
	position: fixed;
	top: 80px;
	right: 48px;
	text-align: right;
	font-size: 2em;
	font-weight: 800;
	color: #ccc;
	mix-blend-mode: hard-light;
}

.active {
	opacity: 100%;
	transition: all 1s;
}

.sky {
	width: 100vw;
	height: 800px;
	background: url("https://drive.google.com/thumbnail?id=1ZLMVeoB0fG5KXgN4Q-rqIt9kAVxqrWcT&sz=w1000");
	background-size: cover;
	margin-bottom: -56px;
}

.sky h1 {
	font-size: 5rem;
	color: black;
	mix-blend-mode: multiply;
	text-align: center;
}

.end {
	width: 100vw;
	height: 100vh;

margin-bottom: -56px;
	position: absolute;
	top: 12800px;
}

.end h1 {
	font-size: 5rem;
	color: white;
	text-align: center;
}

.species,
.titles {
	opacity: 0;
	transition: all 2s;
}

.visible {
	opacity: 1;
}

.species:hover {
	opacity: 1;
	transition: all 2s;
}

.species {
	position: absolute;
	z-index: 1;
	padding-top: 56px;
}

.titles {
	position: absolute;
	z-index: 2;
	left: 0;
	padding-top: 56px;
}

.species.active,
.titles.active {
	opacity: 1;
}

.species img {
	display: block;
	margin: 0 auto;
	border-radius: 50%;
	width: 200px;
	/* Adjust size as needed */
	height: 200px;
	/* Adjust size as needed */
	transition: transform 0.5s ease-in-out;
	transition: all 1s;
	object-fit: cover;
	border: 10px solid rgba(255, 255, 255, 0.1);
}

.species.active img {
	transform: scale(1);
}

.species .description {
	text-align: center;
}

.species.active .description.active {
	opacity: 1;
}

.species .description h2 {
	font-size: 1.5em;
	margin-top: 10px;
	color: #fff;
}

.species .description p {
	font-size: 1em;
	color: #ccc;
}

.sunlight {
	top: 0;
}

.twilight {
	top: 200px;
}

.midnight {
	top: 1000px;
}

.abyss {
	top: 4000px;
}

.trench {
	top: 6000px;
}

.main-title {
	height: 100%;
	flex-direction: column;
}

.titles h1 {
	font-size: 3em;
	font-weight: 900;
	margin-top: 0px;
	text-align: left;
	color: white;
	border-top: 1px solid white;
}

.titles span {
	font-size: 1em;
	font-weight: 400;
	margin-top: 0px;
	text-align: left;
	color: #ccc;
}

.coelacanth {
	top: 200px;
	left: 50%;
	margin-left: -200px;
}

.japanese-spider-crab {
	top: 300px;
	left: 50%;
	margin-left: 100px;
}

.cuttlefish {
	top: 600px;
	left: 50%;
	margin-left: -100px;
}

.sea-angel {
	top: 600px;
	left: 50%;
	margin-left: 250px;
}

.nautilus {
	top: 700px;
	left: 50%;
	margin-left: -400px;
}

.cockatoo-squid {
	top: 1300px;
	left: 50%;
	margin-left: 100px;
}

.headless-chicken-fish {
	top: 1000px;
	left: 50%;
	margin-left: 200px;
}

.vampire-squid {
	top: 1200px;
	left: 50%;
	margin-left: -400px;
}

.goblin-shark {
	top: 1300px;
	left: 50%;
	margin-left: -150px;
}

.firework-jellyfish {
	top: 1500px;
	left: 50%;
	margin-left: -400px;
}

.dragonfish {
	top: 1500px;
	left: 50%;
	margin-left: 300px;
}

.barreleye-fish {
	top: 2500px;
	left: 50%;
	margin-left: -400px;
}

.anglerfish {
	top: 2500px;
	left: 50%;
	margin-left: -100px;
}

.chimaera {
	top: 2600px;
	left: 50%;
	margin-left: 200px;
}

.pelican-eel {
	top: 3000px;
	left: 50%;
	margin-left: -400px;
}

.deepsea-lizardfish {
	top: 3500px;
	left: 50%;
	margin-left: -100px;
}

.titanic {
	top: 3800px;
	left: 50%;
	margin-left: 200px;
}

.atolla-jellyfish {
	top: 4000px;
	left: 50%;
	margin-left: -400px;
}

.fangtooth {
	top: 5000px;
	left: 50%;
	margin-left: -400px;
}

.faceless-fish {
	top: 5100px;
	left: 50%;
	margin-left: 200px;
}

.grenadier {
	top: 7000px;
	left: 50%;
	margin-left: 200px;
}

.dumbo-octopus {
	top: 7000px;
	left: 50%;
	margin-left: -400px;
}

.comb-jelly {
	top: 7210px;
	left: 50%;
	margin-left: -100px;
}

.hadal-snailfish {
	top: 8100px;
	left: 50%;
	margin-left: 200px;
}

.sea-pig {
	top: 10000px;
	left: 50%;
	margin-left: -300px;
}

.alicella {
	top: 10300px;
	left: 50%;
	margin-left: 100px;
}

.deepsea {
	top: 10898px;
	left: 50%;
	margin-left: -200px;
}
.fangtooth img,
.faceless-fish img {
	object-position: left;
}

/* Existing styles for the custom cursors */
#custom-pointer-cursor,
#custom-cursor {
	position: absolute;
	top: 0;
	left: 0;
	pointer-events: none;
	transform: translate(-50%, -50%);
	transition: transform 0.1s ease-in-out;
	z-index: 9999;
	display: none;
}

#pointer,
#submarine {
	width: 96px;
	height: auto;
	margin-top: -48px;
	margin-left: -48px;
	transition: rotate 0s ease-in-out;
}

.mouse-scroll {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 10px;
}

.mouse {
	width: 48px;
	height: 80px;
	border: 4px solid #000;
	border-radius: 24px;
	display: flex;
	justify-content: center;
	align-items: start;
}

.wheel {
	width: 8px;
	height: 16px;
	background-color: #000;
	border-radius: 4px;
	animation: scroll 1s infinite;
	margin-top: 8px;
}

/* Scroll animation */
@keyframes scroll {
	0% {
		transform: translateY(0);
	}

50% {
		transform: translateY(8px);
	}

100% {
		transform: translateY(0);
	}
}

.arrow {
	width: 10px;
	height: 10px;
	border-right: 2px solid #000;
	border-bottom: 2px solid #000;
	transform: rotate(45deg);
}

@media only screen and (max-width: 600px) {
	.deep {
		transform: scale(0.5);
		margin-top: -125px;
	}

.measures {
		display: none;
	}
}

@media only screen and (min-width: 600px) {
	.deep {
		transform: scale(0.5);
		margin-top: -125px;
	}

.measures {
		display: none;
	}
}

@media only screen and (min-width: 768px) {
	.deep {
		transform: scale(0.6);
		margin-top: -100px;
	}

.measures {
		display: none;
	}
}

@media only screen and (max-width: 992px) {
	.deep {
		transform: scale(0.6);
		margin-top: -100px;
	}

.measures {
		display: none;
	}
}

@media only screen and (min-width: 1200px) {
	.deep {
		transform: scale(1);
		margin-top: 56px;
	}

.measures {
		display: block;
	}
}

.hideAll {
	display: none;
}

a {
	color: #1f2226;
}

console.log("Event Fired")
$(document).ready(function () {
	getDistanceAndPressure();
	$(window).scroll(function () {
		getDistanceAndPressure();
	});
});

function depthToPressure(depth) {
	const gravity = 9.81; // Acceleration due to gravity in m/s^2
	const density = 1025; // Average density of seawater in kg/m^3
	const atmosphericPressure = 101325; // Atmospheric pressure at sea level in Pascals

let pressure = (density * gravity * depth + atmosphericPressure) / 100000;

return pressure;
}

function getDistanceAndPressure() {
	var imageTop = $("#image").offset().top;
	var scrollPosition = $(window).scrollTop();
	var distance = scrollPosition - imageTop;

distance = Math.max(0, Math.round(distance, 11000));

$("#distance").text("Depth: " + distance + " m");

var newPosition = imageTop + distance - scrollPosition;

$("#distance").css("top", newPosition + "px");

let pressure = depthToPressure(distance);
	$("#pressure").text("Pressure: " + Math.round(pressure) + " Bars");
}

$("#showAll").on("click", function () {
	$(".species").addClass("active");
	$(".elements").hide();
	$(".showAll").hide();
	$(".hideAll").show();
});

$("#hideAll").on("click", function () {
	$(".species").removeClass("active");
	$(".elements").show();
	$(".showAll").show();
	$(".hideAll").hide();
});

document.addEventListener("DOMContentLoaded", function () {
	const titlesElements = document.querySelectorAll(".titles");

// Create an intersection titlesobserver
	let titlesobserver = new IntersectionObserver(
		(entries, titlesobserver) => {
			entries.forEach((entry) => {
				if (entry.isIntersecting) {
					entry.target.classList.add("active");
					// Stop observing the element once it becomes visible
					titlesobserver.unobserve(entry.target);
				}
			});
		},
		{
			threshold: 0.1 // Trigger when 10% of the element is visible
		}
	);

// Observe each .titles element
	titlesElements.forEach((titles) => {
		titlesobserver.observe(titles);
	});
});

document.addEventListener("DOMContentLoaded", function () {
	var speciesElements = document.querySelectorAll(".species");
	var elementsNumber = document.getElementById("elementsNumber");
	var speciesCount = 0;

function updateSpeciesCount() {
		speciesCount = document.querySelectorAll(".species.visible").length;
		document.getElementById("elementsNumber").textContent = speciesCount;
	}

speciesElements.forEach(function (element) {
		element.addEventListener("mouseenter", function () {
			if (!element.classList.contains("visible")) {
				element.classList.add("visible");
				updateSpeciesCount();
			}
		});
	});

// Function to check if an element is in the viewport
	function isElementInViewport(el) {
		var rect = el.getBoundingClientRect();
		return (
			rect.top >= 0 &&
			rect.left >= 0 &&
			rect.bottom <=
				(window.innerHeight || document.documentElement.clientHeight) &&
			rect.right <= (window.innerWidth || document.documentElement.clientWidth)
		);
	}
});

Frontend Forever App