Product Comparison Layout and Effect

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    The HTML

    
    
    Product 1

    Chryseia

    2011 Douro Touriga Nacional 13% $55.90

    The CSS

    .view {
    	-webkit-transition: -webkit-transform 0.4s ease-in-out;
    	transition: transform 0.4s ease-in-out;
    }
    
    .view--compare {
    	-webkit-transform: scale3d(0.9,0.9,1);
    	transform: scale3d(0.9,0.9,1);
    }
    
    /* product grid */
    .grid {
    	margin: 0 auto;
    	padding: 4em 1em;
    	max-width: 1200px;
    	text-align: center;
    	overflow: hidden;
    	-webkit-touch-callout: none;
    	-webkit-user-select: none;
    	-khtml-user-select: none;
    	-moz-user-select: none;
    	-ms-user-select: none;
    	user-select: none;
    }
    
    /* if flexbox is supported, let's use it to lay out the products */
    .flexbox .grid {
    	display: -ms-flexbox;
    	display: -webkit-flex;
    	display: flex;
    	-webkit-flex-direction: row;
    	-ms-flex-direction: row;
    	flex-direction: row;
    	-webkit-flex-wrap: wrap;
    	-ms-flex-wrap: wrap;
    	flex-wrap: wrap;
    	-webkit-justify-content: center;
    	-ms-flex-pack: center;
    	justify-content: center;
    	-webkit-align-content: stretch;
    	-ms-flex-line-pack: stretch;
    	align-content: stretch;
    	-webkit-align-items: flex-start;
    	-ms-flex-align: start;
    	align-items: flex-start;
    }
    
    /* product */
    .product {
    	position: relative;
    	display: inline-block;
    	vertical-align: top;
    	min-width: 16em;
    	margin: 0 1em 2.5em;
    	padding: 1.5em 1.5em 2em;
    	background: #24252A;
    	border-radius: 5px;
    }
    
    .product--selected {
    	box-shadow: 0 0 0 2px #5C5EDC;
    }
    
    .flexbox .product {
    	display: block;
    	-webkit-flex: 0 0 16em;
    	-ms-flex: 0 0 16em;
    	flex: 0 0 16em;
    }
    
    /* product info */
    .product__info > span {
    	display: block;
    	padding: 1em 0;
    }
    
    /* since we'll be using the product info inside of the comparison, we'll hide the extra info for the grid view */
    .grid .extra {
    	display: none;
    }
    
    .product__image {
    	display: block;
    	margin: 0 auto;
    	max-width: 100%;
    	-webkit-transform-origin: 50% 100%;
    	transform-origin: 50% 100%;
    }
    
    .product:hover .product__image {
    	-webkit-animation: swing 0.6s forwards;	
    	animation: swing 0.6s forwards;	
    }
    
    /* https://daneden.github.io/animate.css/ */
    @-webkit-keyframes swing {
    	25% {
    		-webkit-transform: rotate3d(0, 0, 1, 6deg);
    		transform: rotate3d(0, 0, 1, 6deg);
    	}
    
    	50% {
    		-webkit-transform: rotate3d(0, 0, 1, -4deg);
    		transform: rotate3d(0, 0, 1, -4deg);
    	}
    
    	75% {
    		-webkit-transform: rotate3d(0, 0, 1, 2deg);
    		transform: rotate3d(0, 0, 1, 2deg);
    	}
    
    	100% {
    		-webkit-transform: rotate3d(0, 0, 1, 0deg);
    		transform: rotate3d(0, 0, 1, 0deg);
    	}
    }
    
    @keyframes swing {
      25% {
    		-webkit-transform: rotate3d(0, 0, 1, 6deg);
    		transform: rotate3d(0, 0, 1, 6deg);
    	}
    
    	50% {
    		-webkit-transform: rotate3d(0, 0, 1, -4deg);
    		transform: rotate3d(0, 0, 1, -4deg);
    	}
    
    	75% {
    		-webkit-transform: rotate3d(0, 0, 1, 2deg);
    		transform: rotate3d(0, 0, 1, 2deg);
    	}
    
    	100% {
    		-webkit-transform: rotate3d(0, 0, 1, 0deg);
    		transform: rotate3d(0, 0, 1, 0deg);
    	}
    }
    
    .product__title {
    	font-size: 150%;
    	margin: 1em 0 0;
    	min-height: 3em;
    }
    
    .product__price {
    	font-weight: bold;
    	color: #797BED;
    }
    
    .action {
    	display: inline-block;
    	font-size: 1em;
    	white-space: nowrap;
    	padding: 0.85em 1.25em;
    	cursor: pointer;
    	border: none;
    	background: transparent;
    	text-align: center;
    }
    
    .action:focus {
    	outline: none;
    }
    
    .action--button {
    	background: #2C2D34;
    	color: #fff;
    	border-radius: 2px;
    	-webkit-transition: background 0.2s;
    	transition: background 0.2s;
    }
    
    .action--button:hover {
    	background: #5C5EDC;
    }
    
    .action__text {
    	font-family: 'Raleway', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    	font-weight: bold;
    	letter-spacing: 1px;
    	font-size: .813em;
    	vertical-align: middle;
    	display: inline-block;
    }
    
    .action__text--invisible {
    	position: absolute;
    	top: 100%;
    	opacity: 0;
    	pointer-events: none;
    }
    
    .action--button i + span {
    	margin-left: 1em;
    }
    
    .flexbox .action--buy {
    	-webkit-align-self: center;
    	-ms-flex-item-align: center;
    	align-self: center;
    	margin-top: 1em;
    	-webkit-flex: none;
    	-ms-flex: none;
    	flex: none;
    }
    
    .action--close {
    	position: absolute;
    	overflow: hidden;
    	top: 0;
    	right: 0;
    	font-size: 1.5em;
    	color: #ddd;
    	pointer-events: none;
    	opacity: 0;
    	-webkit-transition: opacity 0.3s, background 0.2s;
    	transition: opacity 0.3s, background 0.2s;
    }
    
    .view--compare + .compare .action--close {
    	pointer-events: auto;
    	opacity: 1;
    	-webkit-transition-delay: 0.4s, 0s;
    	transition-delay: 0.4s, 0s;
    }
    
    .action--close:hover,
    .action--close:focus {
    	color: #797BED;
    }
    
    .action--compare {
    	margin: 0 0 0 4px;
    	opacity: 0;
    	pointer-events: none;
    	cursor: default;
    	background-color: #34363D;
    	color: #565B6C;
    	-webkit-transition: opacity 0.3s;
    	transition: opacity 0.3s;
    }
    
    .compare-basket--active .action--compare {
    	opacity: 1;
    }
    
    .compare-basket--active .action--compare:nth-child(3),
    .compare-basket--active .action--compare:nth-child(4) {
    	background-color: #494BC7;
    	color: #fff;
    	pointer-events: auto;
    	cursor: pointer;
    }
    
    .action--remove {
    	position: absolute;
    	overflow: hidden;
    	color: #ddd;
    	top: 0px;
    	right: 2px;
    	padding: 0;
    	font-size: 0.65em;
    }
    
    .action--compare-add {
    	color: #ddd;
    	position: absolute;
    	top: 10px;
    	right: 5px;
    }
    
    .action--compare-add:hover .action__text--invisible {
    	opacity: 1;
    	top: 35px;
    	right: 10px;
    	color: #ddd;
    	font-size: 75%;
    	letter-spacing: 0;
    	background: #2F3035;
    	border-radius: 2px;
    	padding: 3px 5px;
    }
    
    .action--remove:hover,
    .action--compare-add:hover {
    	color: #5C5EDC;
    }
    
    .action--compare-add .fa-check,
    .action--compare-add input[type=checkbox]:checked ~ .fa-plus {
    	display: none;
    }
    
    .action--compare-add input[type=checkbox]:checked ~ .fa-check {
    	display: block;
    	color: #5C5EDC;
    }
    
    .check-hidden {
    	position: absolute;
    	opacity: 0;
    }
    
    .compare-basket {
    	width: 100%;
    	padding: 0.75em;
    	text-align: right;
    	position: fixed;
    	top: 0;
    	left: 0;
    	background: #212227;
    	z-index: 1000;
    	-webkit-touch-callout: none;
    	-webkit-user-select: none;
    	-khtml-user-select: none;
    	-moz-user-select: none;
    	-ms-user-select: none;
    	user-select: none;
    	-webkit-transform: translate3d(0,-100%,0);
    	transform: translate3d(0,-100%,0);
    	-webkit-transition: -webkit-transform 0.3s cubic-bezier(0.2,1,0.3,1);
    	transition: transform 0.3s cubic-bezier(0.2,1,0.3,1);
    }
    
    .compare-basket--active {
    	-webkit-transform: translate3d(0,0,0);
    	transform: translate3d(0,0,0);
    }
    
    .flexbox .compare-basket {
    	display: -webkit-flex;
    	display: -ms-flex;
    	display: flex;
    	-webkit-justify-content: flex-end;
    	-ms-flex-pack: end;
    	justify-content: flex-end;
    }
    
    .product-icon {
    	display: inline-block;
    	vertical-align: middle;
    	background: #42444F;
    	width: 50px;
    	height: 50px;
    	padding: 5px;
    	margin: 0 3px;
    	border-radius: 2px;
    	position: relative;
    }
    
    .product-icon::after {
    	content: '';
    	position: absolute;
    	width: 100%;
    	height: 100%;
    	top: 0;
    	left: 0;
    	border-radius: 4px;
    	z-index: -1;
    	box-shadow: -56px 0 #2C2D34;
    }
    
    .compare-basket--full .product-icon::after {
    	display: none;
    }
    
    .flexbox .product-icon {
    	display: block;
    }
    
    /* comparison overlay */
    .compare {
    	position: fixed;
    	z-index: 100;
    	width: 100%;
    	height: 0;
    	overflow: hidden;
    	top: 0;
    	left: 0;
    	z-index: 1001;
    	-webkit-transition: height 0s 0.4s;
    	transition: height 0s 0.4s;
    }
    
    .flexbox .compare {
    	display: -webkit-flex;
    	display: -ms-flex;
    	display: flex;
    }
    
    .view--compare + .compare {
    	pointer-events: auto;
    	height: 100%;
    	-webkit-transition: none;
    	transition: none;
    }
    
    .compare::before {
    	content: '';
    	position: absolute;
    	width: 100%;
    	height: 100%;
    	top: 0;
    	left: 0;
    	background: rgba(0,0,0,0.5);
    	opacity: 0;
    	-webkit-transition: opacity 0.4s;
    	transition: opacity 0.4s;
    }
    
    .view--compare + .compare::before {
    	opacity: 1;
    }
    
    .compare__item {
    	height: 100%;
    	width: 50%;
    	background: #24252A;
    	text-align: center;
    	cursor: default;
    	padding: 2em 0;
    	-webkit-transition: -webkit-transform 0.4s ease-in-out;
    	transition: transform 0.4s ease-in-out;
    }
    
    .no-flexbox .compare__item {
    	display: inline-block;
    	width: 50%;
    }
    
    .compare__item:nth-of-type(2) {
    	background: #212227;
    }
    
    .compare__item .product__title {
    	margin: 1em 0;
    	min-height: 0;
    }
    
    .compare__item .product__price {
    	color: #CECECE;
    }
    
    .compare__item span[class^="product__"] {
    	display: block;
    	padding: 0.85em 0;
    	-webkit-transition: background-color 0.3s;
    	transition: background-color 0.3s;
    }
    
    .compare__item span[class^="product__"].hover {
    	background: #000;
    }
    
    /* three items */
    .compare__item:first-of-type:nth-last-of-type(3),
    .compare__item:first-of-type:nth-last-of-type(3) ~ .compare__item {
        width: 33.3333%;
    }
    
    .flexbox .compare__item {
    	-webkit-flex: auto;
    	-ms-flex: auto;
    	flex: auto;
    }
    
    .compare__item:nth-child(odd) {
    	-webkit-transform: translate3d(0,-100vh,0);
    	transform: translate3d(0,-100vh,0);
    }
    
    .compare__item:nth-child(even) {
    	-webkit-transform: translate3d(0,100vh,0);
    	transform: translate3d(0,100vh,0);
    }
    
    .view--compare + .compare .compare__item:nth-child(odd),
    .view--compare + .compare .compare__item:nth-child(even) {
    	-webkit-transform: translate3d(0,0,0);
    	transform: translate3d(0,0,0);
    }
    
    .compare__effect {
    	width: 100%;
    	height: 100%;
    	opacity: 0;
    	-webkit-transition: -webkit-transform 1s cubic-bezier(0.2, 1, 0.3, 1), opacity 1s cubic-bezier(0.2, 1, 0.3, 1);
    	transition: transform 1s cubic-bezier(0.2, 1, 0.3, 1), opacity 1s cubic-bezier(0.2, 1, 0.3, 1);
    }
    
    .compare__item:nth-child(odd) .compare__effect {
    	-webkit-transform: translate3d(0,-250px,0);
    	transform: translate3d(0,-250px,0);
    }
    
    .compare__item:nth-child(even) .compare__effect {
    	-webkit-transform: translate3d(0,250px,0);
    	transform: translate3d(0,250px,0);
    }
    
    .view--compare + .compare .compare__item:nth-child(odd) .compare__effect,
    .view--compare + .compare .compare__item:nth-child(even) .compare__effect {
    	opacity: 1;
    	-webkit-transform: translate3d(0,0,0);
    	transform: translate3d(0,0,0);
    	-webkit-transition-delay: 0.3s;
    	transition-delay: 0.3s;
    }
    
    @media screen and (min-width: 59.688em) {
    	.flexbox .compare__effect {
    		display: -webkit-flex;
    		display: -ms-flex;
    		display: flex;
    		-webkit-flex-direction: column;
    		-ms-flex-direction: column;
    		flex-direction: column;
    		-webkit-justify-content: space-between;
    		-ms-flex-pack: justify;
    		justify-content: space-between;
    	}
    
    	.flexbox .compare__item .product__image {
    		-webkit-align-self: center;
    		-ms-flex-align: center;
    		align-self: center;
    		-webkit-flex: none;
    		-ms-flex: none;
    		flex: none;
    	}
    }
    
    @media screen and (max-width: 59.688em) {
    	.grid {
    		padding: 2em 0.5em;
    		font-size: 65%;
    	}
    
    	.product {
    		margin: 0 0.5em 1em;
    		min-width: 13em;
    	}
    
    	.product__title {
    		font-size: 115%;
    	}
    
    	.flexbox .product {
    		-webkit-flex: 0 0 13em;
    		-ms-flex: 0 0 13em;
    		flex: 0 0 13em;
    	}
    
    	.flexbox .compare {
    		-webkit-flex-direction: column;
    		-ms-flex-direction: column;
    		flex-direction: column;
    	}
    
    	.no-flexbox .compare__item,
    	.compare__item,
    	.compare__item:first-of-type:nth-last-of-type(3),
    	.compare__item:first-of-type:nth-last-of-type(3) ~ .compare__item {
    		width: 100%;
    	}
    
    	.compare__item {
    		text-align: left;
    		padding: 1.5em;
    		font-size: 90%;
    	}
    
    	.compare__item .product__image {
    		height: 40px;
    		float: left;
    	}
    
    	.compare__item .product__title {
    		margin: 0 40px 0 43px;
    		font-size: 0.85em;
    		display: block;
    	}
    
    	.compare__item .product__year { border-bottom: 2px solid #2E294E; }
    	.compare__item .product__region { border-bottom: 2px solid #6D6FD2; }
    	.compare__item .product__varietal { border-bottom: 2px solid #4B5267; }
    	.compare__item .product__alcohol { border-bottom: 2px solid #3C3474; }
    
    	.action--close {
    		padding: 0.5em 0.75em;
    	}
    
    	.compare__item .action--buy {
    		margin: 0;
    		display: block;
    	}
    
    	.compare__item span[class^="product__"] {
    		display: inline-block;
    		padding: 0.25em;
    		margin: 0 0 0.5em 0;
    		font-size: 0.85em;
    	}
    
    	.compare__item:nth-child(odd) {
    		-webkit-transform: translate3d(-100%,0,0);
    		transform: translate3d(-100%,0,0);
    	}
    
    	.compare__item:nth-child(even) {
    		-webkit-transform: translate3d(100%,0,0);
    		transform: translate3d(100%,0,0);
    	}
    
    	.compare__item:nth-child(odd) .compare__effect {
    		-webkit-transform: translate3d(-250px,0,0);
    		transform: translate3d(-250px,0,0);
    	}
    
    	.compare__item:nth-child(even) .compare__effect {
    		-webkit-transform: translate3d(250px,0,0);
    		transform: translate3d(250px,0,0);
    	}
    }

    The JavaScript

    (function() {
    
    	var viewEl = document.querySelector('.view'),
    		gridEl = viewEl.querySelector('.grid'),
    		items = [].slice.call(gridEl.querySelectorAll('.product')),
    		basket;
    
    	// the compare basket
    	function CompareBasket() {
    		this.el = document.querySelector('.compare-basket');
    		this.compareCtrl = this.el.querySelector('.action--compare');
    		this.compareWrapper = document.querySelector('.compare'),
    		this.closeCompareCtrl = this.compareWrapper.querySelector('.action--close')
    		
    		this.itemsAllowed = 3;
    		this.totalItems = 0;
    		this.items = [];
    
    		// compares items in the compare basket: opens the compare products wrapper
    		this.compareCtrl.addEventListener('click', this._compareItems.bind(this));
    		// close the compare products wrapper
    		var self = this;
    		this.closeCompareCtrl.addEventListener('click', function() {
    			// toggle compare basket
    			classie.add(self.el, 'compare-basket--active');
    			// animate..
    			classie.remove(viewEl, 'view--compare');
    		});
    	}
    
    	CompareBasket.prototype.add = function(item) {
    		// check limit
    		if( this.isFull() ) {
    			return false;
    		}
    
    		classie.add(item, 'product--selected');
    
    		// create item preview element
    		var preview = this._createItemPreview(item);
    		// prepend it to the basket
    		this.el.insertBefore(preview, this.el.childNodes[0]);
    		// insert item
    		this.items.push(preview);
    
    		this.totalItems++;
    		if( this.isFull() ) {
    			classie.add(this.el, 'compare-basket--full');
    		}
    
    		classie.add(this.el, 'compare-basket--active');
    	};
    
    	CompareBasket.prototype._createItemPreview = function(item) {
    		var self = this;
    
    		var preview = document.createElement('div');
    		preview.className = 'product-icon';
    		preview.setAttribute('data-idx', items.indexOf(item));
    		
    		var removeCtrl = document.createElement('button');
    		removeCtrl.className = 'action action--remove';
    		removeCtrl.innerHTML = 'Remove product';
    		removeCtrl.addEventListener('click', function() {
    			self.remove(item);
    		});
    		
    		var productImageEl = item.querySelector('img.product__image').cloneNode(true);
    
    		preview.appendChild(productImageEl);
    		preview.appendChild(removeCtrl);
    
    		var productInfo = item.querySelector('.product__info').innerHTML;
    		preview.setAttribute('data-info', productInfo);
    
    		return preview;
    	};
    
    	CompareBasket.prototype.remove = function(item) {
    		classie.remove(this.el, 'compare-basket--full');
    		classie.remove(item, 'product--selected');
    		var preview = this.el.querySelector('[data-idx = "' + items.indexOf(item) + '"]');
    		this.el.removeChild(preview);
    		this.totalItems--;
    
    		var indexRemove = this.items.indexOf(preview);
    		this.items.splice(indexRemove, 1);
    
    		if( this.totalItems === 0 ) {
    			classie.remove(this.el, 'compare-basket--active');
    		}
    
    		// checkbox
    		var checkbox = item.querySelector('.action--compare-add > input[type = "checkbox"]');
    		if( checkbox.checked ) {
    			checkbox.checked = false;
    		}
    	};
    
    	CompareBasket.prototype._compareItems = function() {
    		var self = this;
    
    		// remove all previous items inside the compareWrapper element
    		[].slice.call(this.compareWrapper.querySelectorAll('div.compare__item')).forEach(function(item) {
    			self.compareWrapper.removeChild(item);
    		});
    
    		for(var i = 0; i < this.totalItems; ++i) {
    			var compareItemWrapper = document.createElement('div');
    			compareItemWrapper.className = 'compare__item';
    
    			var compareItemEffectEl = document.createElement('div');
    			compareItemEffectEl.className = 'compare__effect';
    
    			compareItemEffectEl.innerHTML = this.items[i].getAttribute('data-info');
    			compareItemWrapper.appendChild(compareItemEffectEl);
    
    			this.compareWrapper.insertBefore(compareItemWrapper, this.compareWrapper.childNodes[0]);
    		}
    
    		setTimeout(function() {
    			// toggle compare basket
    			classie.remove(self.el, 'compare-basket--active');
    			// animate..
    			classie.add(viewEl, 'view--compare');
    		}, 25);
    	};
    
    	CompareBasket.prototype.isFull = function() {
    		return this.totalItems === this.itemsAllowed;
    	};
    
    	function init() {
    		// initialize an empty basket
    		basket = new CompareBasket();
    		initEvents();
    	}
    
    	function initEvents() {
    		items.forEach(function(item) {
    			var checkbox = item.querySelector('.action--compare-add > input[type = "checkbox"]');
    			checkbox.checked = false;
    
    			// ctrl to add to the "compare basket"
    			checkbox.addEventListener('click', function(ev) {
    				if( ev.target.checked ) {
    					if( basket.isFull() ) {
    						ev.preventDefault();
    						return false;
    					}
    					basket.add(item);
    				}
    				else {
    					basket.remove(item);
    				}
    			});
    		});
    	}
    
    	init();
    
    })();

     

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