Pen Settings

HTML

CSS

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

JavaScript

Babel is required to process package imports. If you need a different preprocessor remove all packages first.

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

Behavior

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.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <div class="align-center">

    <h1 class="heading">Brainymo</h1>
    <p class="desc">Frontend Arsenal Memory Game</p>

    <button class="btn" id="btn-start">
        Start
    </button>

    <div class="cards-container">
        <div class="flip-container hide" id="card-template">
            <div class="flipper">
                <div class="front">
                    <label>frontend technologies</label>
                </div>
                <div class="back">
                    <label></label>
                </div>
            </div>
        </div>
    </div>

    <div class="timer">
        <label id="minutes"></label>:
        <label id="seconds"></label>
        <div class="time">
            MY BEST TIME: <span id="bestTime"></span>
        </div>
    </div>
</div>
              
            
!

CSS

              
                /* Colors */
$white: #FFFFEA;
$red: #FF5E5B;
$blue: #00CECB;
$yellow: #FFED66;

/* Fonts */
$abel: 'Abel', sans-serif;
$lobster: 'Lobster', cursive;

/* Background images */
$bgPattern: "https://www.transparenttextures.com/patterns/inspiration-geometry.png";


@mixin transform($transforms) {
	   -moz-transform: $transforms;
	     -o-transform: $transforms;
	    -ms-transform: $transforms;
	-webkit-transform: $transforms;
          transform: $transforms;
}

/* General */

body {
    background-color: $white;
    background-image: url($bgPattern);
    font-family: $abel;
    color: $red;
}



/* Main page */

.heading {
    font-size: 52px;
    font-family: $lobster;
    color: $red;
    margin-bottom: 0;
}

p.desc {
  letter-spacing: 0.5px;
  margin-top: 0;
  margin-bottom: 60px;
}



/* Cards */ 

.cards-container {
    display: block;
    margin: 40px;
}

.flip-container {
    position: relative;
    display: inline-block;
    margin: 15px;
    perspective: 1000px;
    cursor: pointer;
  
    .flipper {
        position: relative;
        -webkit-transform-style: preserve-3d;
        -webkit-transition: 0.5s;
        -moz-transform-style: preserve-3d;
        -moz-transition: 0.5s;
        -ms-transform-style: preserve-3d;
        -ms-transition: 0.5s;
        -o-transform-style: preserve-3d;
        -o-transition: 0.5s;
    }
  
    &.active .flipper {
        @include transform(rotateY(180deg)); 
    }
}
   

.flip-container, 
.front, 
.back {
    border-radius: 5px;
    color: $white;
    width: 180px;
    height: 220px;
}

.front, 
.back {
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility:    hidden;
    -ms-backface-visibility:     hidden;
    position: absolute;
    top: 0;
    left: 0;
}

.front {
    background-color: $red;
    z-index: 2;
    @include transform(rotateY(0));
  
    label {
      cursor: pointer;
      display: inline-block;
      font-size: 22px;
      padding-top: 15px;
    }
}

.back {
    background-color: $blue;
    text-align: center;
    vertical-align: middle;
    display: table-cell;
    @include transform(rotateY(180deg));
  
    label {
        display: block;
        width: 100%;
        font-size: 24px;
        margin-top: 10px;
    }
}



/* Timer */

.timer {
    display: none;
    position: fixed;
    pointer-events: none;
    left: 30px;
    top: 30px;
  
    label#minutes,
    label#seconds {
        display: inline-block;
        font-size: 20px;
    }
  
    .time {
        display: none;
        font-size: 13px;
    }
}


/* Buttons */

.btn {
    display: inline-block;
    background-color: $yellow;
    padding: 15px 40px;
    border: none;
    border-radius: 30px;

    font-family: $abel;
    font-size: 20px;
    text-decoration: none;
    text-transform: uppercase;
    color: $red;

    box-shadow: 0 3px 0 $red;
    cursor: pointer;
    transition: all 100ms linear;
    
    &:hover {
        @include transform(translateY(-4px));
        box-shadow: 0 7px 0 $red;
    }

    &:focus { outline: 0; }
}


/* Github ribbon */ 
#github {
    position: absolute;
    top: 0;
    right: 0;
    border: 0;
}

/* Helpers */

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

.hide {
    display: none !important;
}

.cursor-default {
    cursor: default !important;
}



/* Reponsive Rules */

@media screen and (max-width: 1200px) {
    .flip-container, .front, .back {
        width: 140px;
        height: 180px;
    }

    .timer {
        padding: 10px;
        border-radius: 5px;
        background-color: $white;
    }
}

@media screen and (max-width: 992px) {
    .flip-container, .front, .back {
        width: 100px;
        height: 140px;
    }

    .front label {
        display: inline-block;
        font-size: 16px;
        padding-top: 10px;
    }

    .cards-container {
        margin: 40px 10px;
    }

    .timer {
        top: 10px;
        left: 10px;
    }
}

@media screen and (max-width: 768px) {
    .flip-container, .front, .back {
        width: 80px;
        height: 120px;
    }
}



/* Animations */

@keyframes wobble {
    from { transform: none; }
    15% { transform: translate3d(-10%, 0, 0) rotate3d(0, 0, 1, -5deg); }
    30% { transform: translate3d(10%, 0, 0) rotate3d(0, 0, 1, 3deg); }
    45% { transform: translate3d(-5%, 0, 0) rotate3d(0, 0, 1, -3deg); }
    60% { transform: translate3d(5%, 0, 0) rotate3d(0, 0, 1, 2deg); }
    75% { transform: translate3d(-10%, 0, 0) rotate3d(0, 0, 1, -1deg); }
    to { transform: none; }
}

.wobble {
    animation: wobble 600ms ease-in-out;
}


              
            
!

JS

              
                var BRAINYMO = BRAINYMO || {};

BRAINYMO.Game = (function() {
  
    var activeCards = [];
    var numOfCards;
    var cardHitCounter = 0;
    var card;
    var timer;
    var storage;

    /**
     * Method that will be invoked on card click
     */
    function handleCardClick() {

        var connection = $(this).data('connection');
        var hit;

        // Set card in active state
        // 'this' needs to be attached to context of card which is clicked
        if ( !$(this).hasClass('active') ) {
            $(this).addClass('active');
            activeCards.push($(this));

            // If user click on two cards then check
            if (activeCards.length == 2) {
                hit = checkActiveCards(activeCards);
            }

            if (hit === true) {
                cardHitCounter++;
                activeCards[0].add(activeCards[1]).unbind().addClass('wobble cursor-default');
                activeCards = [];

                // Game End
                if(cardHitCounter === (numOfCards / 2)) {
                    // Reset active cards
                    activeCards = [];
                    // Reset counter
                    cardHitCounter = 0;
                    // End game
                    endGame();
                }
            }
            // In case when user open more then 2 cards then automatically close first two
            else if(activeCards.length === 3) {
                for(var i = 0; i < activeCards.length - 1; i++) {
                    activeCards[i].removeClass('active');
                }
                activeCards.splice(0, 2);
            }
        }
    }

    function endGame() {
        timer.stopTimer();

        // Retrieve current time
        var time = timer.retrieveTime();

        // Retrieve time from storage
        var timeFromStorage = storage.retrieveBestTime();

        // if there's already time saved in storage check if it's better than current one
        if (timeFromStorage != undefined && timeFromStorage != '') {
            // if current game time is better than one saved in store then save new one
            if (time.minutes < timeFromStorage.minutes || (time.minutes == timeFromStorage.minutes && time.seconds < timeFromStorage.seconds) ) {
                storage.setBestTime(time);
            }
        }
        // else if time is not saved in storage save it
        else {
            storage.setBestTime(time);
        }

        // Update best time
        timer.updateBestTime();
    }

    function checkActiveCards(connections) {
        return connections[0].data('connection') === connections[1].data('connection');
    }

    return function(config) {

        /**
         * Main method for game initialization
         */
        this.startGame = function() {
            card = new BRAINYMO.Card();
            timer = new BRAINYMO.Timer();
            storage = new BRAINYMO.Storage();
            numOfCards = config.cards.length;
            card.attachCardEvent(handleCardClick, config);
        };

        /**
         * After game initialization call this method in order to generate cards
         */
        this.generateCardSet = function() {
            // Generate new card set
            card.generateCards(config.cards);
            // Reset active cards array
            activeCards = [];

            // Reset timer
            timer.stopTimer();
            // Set timer
            timer.startTimer();
        };

        this.startGame();
    }

})();



BRAINYMO.Card = (function () {

    // Private variables
    var $cardsContainer = $('.cards-container');
    var $cardTemplate = $('#card-template');

    /**
     * Private method
     * Take card template from DOM and update it with card data
     * @param {Object} card - card object
     * @return {Object} template - jquery object
     */
    function prepareCardTemplate (card) {
        var template = $cardTemplate
                            .clone()
                            .removeAttr('id')
                            .removeClass('hide')
                            .attr('data-connection', card.connectionID);

        // If card has background image
        if (card.backImg != '' && card.backImg != undefined) {
            template.find('.back').css({
                'background': 'url(' + card.backImg + ') no-repeat center center',
                'background-size': 'cover'
            });
        }
        // Else if card has no background image but has text
        else if (card.backTxt != '' && card.backTxt != undefined) {
            template.find('.back > label').html(card.backTxt);
        }

        return template;
    }

    /**
     * Private method
     * Method for random shuffling array
     * @param {Object} cardsArray - array of card objects
     * @return {Object} returns random shuffled array
     */
    function shuffleCards(cardsArray) {
        var currentIndex = cardsArray.length, temporaryValue, randomIndex;

        while (0 !== currentIndex) {
            randomIndex = Math.floor(Math.random() * currentIndex);
            currentIndex -= 1;
            temporaryValue = cardsArray[currentIndex];
            cardsArray[currentIndex] = cardsArray[randomIndex];
            cardsArray[randomIndex] = temporaryValue;
        }

        return cardsArray;
    }
    
    return function() {

        /**
         * Public method
         * Prepare all cards and insert them into DOM
         * Before inserting new set of cards method will erase all previous cards
         * @param {Object} cards - array of card objects
         */
        this.generateCards = function(cards) {
            var templates = [];
            var preparedTemplate;

            // Prepare every card and push it to array
            cards.forEach(function (card) {
                preparedTemplate = prepareCardTemplate(card);
                templates.push(preparedTemplate);
            });

            // Shuffle card array
            templates = shuffleCards(templates);

            // Hide and empty card container
            $cardsContainer.hide().empty();

            // Append all cards to cards container
            templates.forEach(function(card) {
                $cardsContainer.append(card);
            });

            // Show card container
            $cardsContainer.fadeIn('slow');
        };

        /**
         * Public method
         * Attach click event on every card
         * Before inserting new set of cards method will erase all previous cards
         * @param {Function} func - function that will be invoked on card click
         */
        this.attachCardEvent = function(func) {
            $cardsContainer.unbind().on('click', '.flip-container', function() {
                func.call(this);
            });
        }
    }
    
})();

BRAINYMO.Timer = (function() {

    var $timer = $('.timer');
    var $seconds = $timer.find('#seconds');
    var $minutes = $timer.find('#minutes');
    var $bestTimeContainer = $timer.find('.time');


    var minutes, seconds;
    
    function decorateNumber(value) {
        return value > 9 ? value : '0' + value;
    }

    return function() {
        var interval;
        var storage = new BRAINYMO.Storage();
        
        this.startTimer = function() {
            var sec = 0;
            var bestTime;

            // Set timer interval
            interval = setInterval( function() {
                seconds = ++sec % 60;
                minutes = parseInt(sec / 60, 10);
                $seconds.html(decorateNumber(seconds));
                $minutes.html(decorateNumber(minutes));
            }, 1000);

            // Show timer
            $timer.delay(1000).fadeIn();

            this.updateBestTime();
        };

        this.updateBestTime = function() {
            // Check if user have saved best game time
            bestTime = storage.retrieveBestTime();
            if(bestTime != undefined && bestTime != '') {
                $bestTimeContainer
                    .find('#bestTime')
                    .text(bestTime.minutes + ':' + bestTime.seconds)
                    .end()
                    .fadeIn();
            }
        };
        
        this.stopTimer = function() {
            clearInterval(interval);  
        };

        this.retrieveTime = function() {
            return {
                minutes: decorateNumber(minutes),
                seconds: decorateNumber(seconds)
            }
        };
    }
})();


BRAINYMO.Storage = (function() {

    return function() {

        /**
         * Save best time to localStorage
         * key = 'bestTime'
         * @param {Object} time - object with keys: 'minutes', 'seconds'
         */
        this.setBestTime = function(time) {
            localStorage.setItem('bestTime', JSON.stringify(time));
        };

        /**
         * Retrieve best time from localStorage
         */
        this.retrieveBestTime = function() {
            return JSON.parse(localStorage.getItem('bestTime'));
        };

    }
})();



// Game init
$(function() {
  
        var brainymo = new BRAINYMO.Game({
            cards: [
                {
                    backImg: 'https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSexUDniZ8qYHFpbK4Xyjd4Vs_Fx60Zwe7_5INiYN5H5dNNWiJZ',
                    connectionID: 1
                },
                {
                    backTxt: 'GRUNT',
                    connectionID: 1
                },
                {
                    backImg: 'https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQS13Kjh3SeT8Fmcy73l5FKRiH8Tcq9w9SIAddixX-XHwODxe5C',
                    connectionID: 2
                },
                {
                    backTxt: 'REACT',
                    connectionID: 2
                },
                {
                    backImg: 'https://gravatar.com/avatar/5a224f121f96bd037bf6c1c1e2b686fb?s=512&d=https://codepen.io/assets/avatars/user-avatar-512x512-6e240cf350d2f1cc07c2bed234c3a3bb5f1b237023c204c782622e80d6b212ba.png',
                    connectionID: 3
                },
                {
                    backTxt: 'GSAP',
                    connectionID: 3
                },
                {
                    backImg: 'http://richardgmartin.me/wp-content/uploads/2014/11/ember-mascot.jpeg',
                    connectionID: 4
                },
                {
                    backTxt: 'EMBER',
                    connectionID: 4
                },
                {
                    backImg: 'https://odoruinu.files.wordpress.com/2014/11/3284117.png',
                    connectionID: 5
                },
                {
                    backTxt: 'KARMA', 
                    connectionID: 5
                },
                {
                    backImg: 'https://cdn.auth0.com/blog/webpack/logo.png',
                    connectionID: 6
                },
                {
                    backTxt: 'WEBPACK',
                    connectionID: 6
                },
                {
                    backImg: 'https://res.cloudinary.com/teepublic/image/private/s--JnfxjOP1--/t_Resized%20Artwork/c_fit,g_north_west,h_1054,w_1054/co_ffffff,e_outline:53/co_ffffff,e_outline:inner_fill:53/co_bbbbbb,e_outline:3:1000/c_mpad,g_center,h_1260,w_1260/b_rgb:eeeeee/c_limit,f_jpg,h_630,q_90,w_630/v1509564403/production/designs/2016815_1.jpg',
                    connectionID: 7
                },
                {
                    backTxt: 'ANGULAR',
                    connectionID: 7
                },
                {
                    backImg: 'https://smyl.es/wurdp/assets/mongodb.png',
                    connectionID: 8
                },
                {
                    backTxt: 'MONGO DB',
                    connectionID: 8
                },
            ]
        });

        $('#btn-start').click(function() {
            brainymo.generateCardSet();
            $(this).text('Restart');
        });

    });
              
            
!
999px

Console