Luna: Schrödinger's Wolf

index.html

<!-- Original Image provided by Freepiks at https://www.freepik.com/free-vector/triangle-wolf-design_723866.htm#term=wolf&page=1&position=3 
I used enginethemes page for *inspiration* ¯\_(ツ)_/¯ 
 Shadow => https://static.enginethemes.com/main/img/shadow.png -->
<div id="hero">
	<div class="view view-after" style="width: 50vw;" id="viewAfter">
		<div class="wrapper-after">
			<div class="logo">
				<h2> <img src="http://res.cloudinary.com/dub9ykyuq/image/upload/v1517696936/wolfsvg_hxf2jz.png" alt=""> Jean Villalobos</h2>
			</div>
			<div class="img-wrapper">
				<img src="http://res.cloudinary.com/dub9ykyuq/image/upload/v1517697588/Untitled_wcfedl.png" alt="">
			</div>
			<div class="img-shadow"></div>
		</div>
	</div>
	<div class="view view-before" id="viewBefore">
		<div class="wrapper-before">
			<div class="logo">
				<h2> <img src="http://res.cloudinary.com/dub9ykyuq/image/upload/v1517696936/wolfsvg_hxf2jz.png" alt=""> Jean Villalobos</h2>
			</div>
			<div class="img-wrapper">
				<img src="http://res.cloudinary.com/dub9ykyuq/image/upload/v1517696936/wolfsvg_hxf2jz.png" alt="">
			</div>
			<div class="img-shadow"></div>
		</div>
	</div>
</div>

luna-schrodinger-s-wolf.markdown

Luna: Schrödinger's Wolf

Engaging dual overlay dynamic made possible with absolute positioning, overflows, and understanding the z-stacking context. Click anywhere to change the width of the blue overlay!

A Pen by Jean on CodePen.

License.

script.babel

const viewAfter = document.getElementById("viewAfter");

document.addEventListener("click", changeWidth);


function changeWidth(e) {
	viewAfter.style = "width: " + e.clientX + "px;";
}


// Particles with mojs

// count = 10 seems to be the magic number for  performance on mobile and older devices

let innerRadius;
let outerRadius;
let smallSize = 20;
let bigSize = 25;

function setRadius() {
	if(window.innerWidth <= 425 ) {
		innerRadius = parseInt(window.innerWidth * 0.1);
		outerRadius = parseInt(window.innerWidth * 0.6);
	} 
	else if(window.innerWidth > 425 && window.innerWidth < 1080) {
		innerRadius = parseInt(window.innerWidth * 0.07);
		outerRadius = parseInt(window.innerWidth * 0.28);
	} 
	else if (window.innerWidth > 1080) {
		innerRadius = parseInt(window.innerHeight * .15);
		outerRadius = parseInt(window.innerHeight * .3);
	} 
	else {
		
	}
}

setRadius();
const DURATION = 1000;
const count = 15;




let smoke = new mojs.Burst({
	opacity: .7,
	parent: "#viewAfter",
  left: 0, top: 0,
  degree:   270,
	angle: -135,
  count:    count,
  radius:   { [innerRadius] : outerRadius },
  children: {
    fill:       ['white', "#2A3A3F"],
    pathScale:  'rand(0.5, 1)',
    radius:     'rand(12, 13)',
    swirlSize:  'rand(20, 25)',
    swirlFrequency: 'rand(2, 4)',
    direction:  [ 1, -1 ],
    duration:   `rand(${1*DURATION}, ${2*DURATION})`,
    delay:      'rand(0, 2000)',
    easing:     'quad.out',
    isSwirl:    true,
    isForce3d:  true,
  }
});

let smokeBefore = new mojs.Burst({
	opacity: .7,
	parent: "#viewBefore",
  left: 0, top: 0,
  degree:   270,
	angle: -135,
  count:    count,
  radius:   { [innerRadius] : outerRadius },
  children: {
    fill:       ['#397fda', "#2A3A3F"],
    pathScale:  'rand(0.5, 1)',
    radius:     'rand(12, 13)',
    swirlSize:  `rand(20, 25)`,
    swirlFrequency: 'rand(2, 4)',
    direction:  [ 1, -1 ],
    duration:   `rand(${1*DURATION}, ${2*DURATION})`,
    delay:      'rand(0, 2000)',
    easing:     'quad.out',
    isSwirl:    true,
    isForce3d:  true,
  }
});

smokeBefore.tune({ x: "50vw", y: "50vh" }).generate().replay();
smoke.tune({ x: "50vw", y: "50vh" }).generate().replay();


let leftParticles = new mojs.Tween({
  repeat: 99999,
	delay: 3000,
	onUpdate: function() {
		smokeBefore.tune({ x: "50vw", y: "50vh" }).generate().replay();
	}
}).play();

let rightParticles = new mojs.Tween({
  repeat: 99999,
	delay: 3000,
	onUpdate: function() {
		smoke.tune({ x: "50vw", y: "50vh" }).generate().replay();
	}
}).play(500);

scripts

<script src="https://cdn.jsdelivr.net/mojs/0.265.6/mo.min.js"></script>

style.css

body {
	font-family: sans-serif;
  margin: 0;
}

.logo {
	padding: 0 15px;
	margin: 0;
	width: 100%;
	color: white;
	position: absolute;
	left: 0;
	overflow: hidden;
}

.logo h2 {
	margin: 0;
}

.view-before .logo {
	color: black;
	
}

.logo img {
	width: 30px;
	vertical-align: bottom;
}

.view {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.view-before {
  z-index: 100;
}

.view-after {
  background-color: #397fda;
  z-index: 200;
	transition: width 1s ease-in-out;
}

.wrapper-after , .wrapper-before {
/* Make Wrapper take the whole screen for relative positioning of wrapper */
  height: 100%;
  width: 100vw;
	position: absolute;
}

.img-wrapper {
/*  Fixed width for consistency on resize & movement  */
  
  position: relative;
  top: 50%;
transform: translate(-4px, -50%);
  left: 0;
  right: 0;
  margin: 0 auto;
  width: 32vh;
  
}

/* Text */
.text-after, .text-before {
	overflow: hidden;
}

.text-after h2, .text-before h2 {
	position: absolute;
	width: 30%;
	padding: 0 2%;
	top: 50%;
	transform: translatey(-50%);
}

.text-after h2:nth-child(1) , .text-before h2:nth-child(1) {
	left: 0;
}

.text-after h2:nth-child(2) , .text-before h2:nth-child(2) {
	right: 0;
}

.text-after {
	color: white;
}

.text-before {
	color: black;
}

/* Exported to PNG */

.img-wrapper img {
  width: 100%;
	animation: float 3s infinite;
}

.img-shadow {
	background: url(https://static.enginethemes.com/main/img/shadow.png) no-repeat center center;
	width: 250px;
	height: 24px;
	left: 0;
  right: 0;
  margin: 0 auto;
	position: absolute;
	bottom: 18%;
	animation: shadowMagnify 3s infinite;
	
}

/* Menu */

.menu {
	position: absolute;
	right: 0;
	z-index: 1000;
}

.menu li {
	margin-right: 10px;
	display: inline-block;
}

.menu a {
	font-weight: bold;
	text-decoration: none;
	color: #2A3A3F;
}


/* Animations */

@keyframes shadowMagnify {
	0% {
		transform: scale(0.7);
		opacity: 0.7;
	}
	50% {
		transform: scale(1);
		opacity: 1;
	}
	100% {
		transform: scale(0.7);
		opacity: 0.7;
	}
	
}

@keyframes float {
	0% {
		transform: translatey(0%);
	}
	50% {
		transform: translatey(8%);
	}
	100% {
		transform: translatey(0%);
	}
}

/* Particles */

#viewBefore div[data-name="mojs-shape"] {
	position: absolute;
	z-index: -10;
}

#viewAfter div[data-name="mojs-shape"] {
	position: absolute;
	z-index: -10;
}

/* Media Queries */

 @media only screen
  and (min-width: 320px)
  and (max-width: 736px)
  and (-webkit-min-device-pixel-ratio: 1) {

	  /*Header*/
	  
	.text-after , .text-before {
		display: none;
	}

	.logo h2 {
		font-size: 18px;
		}
		
		.menu {
			display: none;
		}
}