cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

⚠️ This feature can only be used by logged in users.

Code Indentation

     

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

            
              <div class="anim" id="anim">
	<img src="https://dl.dropboxusercontent.com/s/0zdz0tfet3w0ov0/2ecf462b1b.png" id="card0" class="card0 card" crossorigin="anonymous">
	<div class="shadow1 shadow"></div>
	<img src="https://dl.dropboxusercontent.com/s/5mcga437ozwplst/d6f0903c43.png" id="card1" class="card1 card" crossorigin="anonymous">
	<div class="shadow2 shadow"></div>
	<img src="https://dl.dropboxusercontent.com/s/z5vmbn98kog5klh/de31d264c2.png" id="card2" class="card2 card" crossorigin="anonymous">
	<div class="title">CSS</div>
</div>
            
          
!
            
              $width: 336;
$height: 460;
body { box-sizing: border-box; margin: 0; background: grey; }
#anim {
	position: absolute;
	width: $width*1px; height: $height*1px;
	left: 356px; top: 0;
	perspective: 1500px;
	perspective-origin: 50% -30%;
}
.anim .card, .anim .shadow {
	position: absolute;
	display: block;
	left: 0; top: 0;
	width: $width*1px; height: $height*1px;
	transform-origin: 0 0;
	transform: scale(0.84);
}
.anim .shadow {
	opacity: 0.6;
}
#anim .title {
	position: absolute;
	display: block;
	left: 0.05 * $width * 1px; top: 0.7 * $height * 1px;
	width: 0.9 * $width * 1px; height: 0.2 * $height * 1px;
	border: 1.5px solid #9d8275;
	background-color: rgba(0,0,0,0.65);
	color: #fff;
	font: $width*0.15px "Proxima Nova Cn Rg";
	line-height: 0.2 * $height * 1px;
	text-align: center;
  text-shadow:
   -1px -1px 0 #000,  
    1px -1px 0 #000,
    -1px 1px 0 #000,
     1px 1px 0 #000;
}
	
$progress: 1.0;
$xOffset: 0.08*$width;

.anim .card0 { animation: fanout_card0 1s infinite alternate; }
.anim .shadow1 { animation: fanout_shadow1 1s infinite alternate; }
.anim .card1 { animation: fanout_card1 1s infinite alternate; }
.anim .shadow2 { animation: fanout_shadow2 1s infinite alternate; }
.anim .card2 { animation: fanout_card2 1s infinite alternate; }

@keyframes fanout_card0 {
	from {transform: skewY(0deg) rotateY(0 * 0 * 0.25 * -90deg) translateX($xOffset*2*1px) scale(0.84); }
	to { transform: skewY(0deg) rotateY(1 * 0 * 0.25 * -90deg) translateX($xOffset*2*1px) scale(0.84); }
}
@keyframes fanout_shadow1 {
	from {transform: skewY(0deg) rotateY(0 * 1 * 0.20 * -90deg) translateX($xOffset*1*1px) scale(0.84); }
	to { transform: skewY(5deg) rotateY(1 * 1 * 0.20 * -90deg) translateX($xOffset*1*1px) scale(0.84); }
}
@keyframes fanout_card1 {
	from {transform: skewY(0deg) rotateY(0 * 1 * 0.25 * -90deg) translateX($xOffset*1*1px) scale(0.84); }
	to { transform: skewY(0deg) rotateY(1 * 1 * 0.25 * -90deg) translateX($xOffset*1*1px) scale(0.84); }
}
@keyframes fanout_shadow2 {
	from {transform: skewY(0deg) rotateY(0 * 2 * 0.20 * -90deg) translateX($xOffset*0*1px) scale(0.84); }
	to { transform: skewY(10deg) rotateY(1 * 2 * 0.20 * -90deg) translateX($xOffset*0*1px) scale(0.84); }
}
@keyframes fanout_card2 {
	from {transform: rotateY(0 * 2 * 0.25 * -90deg) translateX($xOffset*0*1px) scale(0.84); }
	to { transform: rotateY(1 * 2 * 0.25 * -90deg) translateX($xOffset*0*1px) scale(0.84); }
}


            
          
!
            
              function getAlphaAsCanvas(img) {
	var canvas = document.createElement('canvas');
	canvas.width = img.width;
	canvas.height = img.height;
	var ctx = canvas.getContext('2d');
	ctx.fillStyle = '#000';
	ctx.fillRect(0, 0, img.width, img.height);
	ctx.globalCompositeOperation = 'destination-in';
	ctx.drawImage(img, 0, 0);
	return canvas;
}

function blurShadow(img, amount) {
	var canvas = document.createElement('canvas');
	canvas.width = img.width;
	canvas.height = img.height;
	var ctx = canvas.getContext('2d');
	var total = amount;
	while(amount--) {
		var alpha = (amount+1) / total;
		var scale = 1+(1-((amount+1) / total))*total/img.height*2;
		ctx.globalAlpha = alpha;
		ctx.translate(-0.5*(scale*img.width-img.width), -0.5*(scale*img.height-img.height));
		ctx.scale(scale, scale);
		ctx.drawImage(img, 0, 0);
		ctx.setTransform(1,0,0,1,0,0);
	}
	return canvas;
}

function paintName(ctx, name) {
	var w = ctx.canvas.width;
	var h = ctx.canvas.height;
	ctx.beginPath();
	ctx.lineWidth = 1.5;
	ctx.strokeStyle = '#9d8275';
	ctx.fillStyle = 'rgba(0,0,0,0.65)';
	ctx.rect(
		w * 0.05, h * 0.7,
		w * 0.9, h * 0.2
	);
	ctx.fill();
	ctx.stroke();
	ctx.fillStyle = '#fff';
	ctx.font = (w*0.15)+'px "Proxima Nova Cn Rg"';
	ctx.textAlign = 'center';
	ctx.textBaseline = 'middle';
	ctx.strokeStyle = '#000';
	ctx.lineWidth = 4;
	ctx.strokeText(name, w * 0.5, h * 0.8);
	ctx.fillText(name, w * 0.5, h * 0.8);
}

function paintCards(ctx, imgs, alpha, progress) {
	var w = ctx.canvas.width;
	var h = ctx.canvas.height;
	function rotateCard(ctx, img, xOffset, yOffset, progress, shift) {
		shift = shift || 0;
		var scale = 0.84;
		var dw = scale * Math.min(1, Math.max(0, Math.cos(progress * Math.PI/2))) * w;
		var sh = h;
		var slice_sw = 1 * w / dw;
		var x = dw; while(x-- > 0) {
			var sx = x / dw * w;
			var dx = x + xOffset;
			var dh = x * 0.3 * progress / dw;
			var dy = (-0.5 + shift) * dh;
			ctx.drawImage(img,
				sx, 0, slice_sw, sh,
				dx, dy * scale * h + yOffset, 1, (1 + dh) * scale * h
			);
		}
	}
	for(var i = 0; i < imgs.length; i++) {
		var img = imgs[i];
		if(i > 0) { // Skip shadow for bottom card
			ctx.globalAlpha = 0.6;
			ctx.globalCompositeOperation = 'source-atop';
			rotateCard(ctx, alpha, (2-i) * (0.08*w), 0, progress * i * 0.20, 2);
		}
		ctx.globalAlpha = 1;
		ctx.globalCompositeOperation = 'source-over';
		rotateCard(ctx, img, (2-i) * (0.08*w), 0, progress * i * 0.25, 1);
	}
}

function startAnimation(ctx, name, imgs) {
	var frame = 0;
	var alpha = blurShadow(getAlphaAsCanvas(imgs[0]), 10);
	Array.prototype.forEach.call(
		document.getElementsByClassName('shadow'), function(el) {
			var shadow = document.createElement('canvas');
			shadow.width = alpha.width;
			shadow.height = alpha.height;
			shadow.getContext('2d').drawImage(alpha, 0, 0);
			el.appendChild(shadow);
		}
	);
	function drawFrame() {
		window.requestAnimationFrame(drawFrame);
		frame++;
		ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
		paintCards(ctx, imgs, alpha, Math.sin((frame % 120) / 120 * Math.PI));
		paintName(ctx, name);
	}
	window.requestAnimationFrame(drawFrame);
}

function main() {
	console.clear();
	var width = 336;
	var height = width * 460/336;
	return Promise.all(
		['card0', 'card1', 'card2']
		.map(function(id) { return imgToPromise(document.getElementById(id)); })
	)
	.then(function(imgs) {
		var canvas = document.createElement('canvas');
		canvas.width = width || 336;
		canvas.height = height || 460;
		document.body.appendChild(canvas);	
		var ctx = canvas.getContext('2d');
		startAnimation(ctx, 'Canvas', imgs);
	})
}

document.addEventListener('DOMContentLoaded', main);

// Helpers
	function imgToPromise(img) {
		return new Promise(function(resolve, reject) {
			if(img.complete) return resolve(img);
			img.onload = function() {
				resolve(img);
			};
			img.onerror = function() {
				reject(new Error('Error loading image: '+img.src));
			};
		});
	}
            
          
!
999px
🕑 One or more of the npm packages you are using needs to be built. You're the first person to ever need it! We're building it right now and your preview will start updating again when it's ready.
Loading ..................

Console