Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

+ add another resource

JavaScript

Babel includes JSX processing.

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

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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

              
                  <section class="score">
    <span class="correct">0</span>/<span class="total">0</span>
    <button id="play-again-btn">Play Again</button>
  </section>
  <section class="draggable-items">
    <!-- Will be dynamically populated - Example Element: -->
    <!-- <i class="fab fa-codepen draggable" draggable="true" style="color: #111111;" id="codepen"></i> -->
  </section>
  <section class="matching-pairs">
    <!-- Will be dynamically populated - Example Element: -->
    <!-- <div class="matching-pair">
      <span class="label">Codepen</span><span class="droppable" data-brand="codepen"></span>
    </div> -->
  </section>
              
            
!

CSS

              
                @import url('https://fonts.googleapis.com/css?family=Montserrat');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Montserrat', sans-serif;
  background-color: #eee;
  color: #111;
}

.score {
  font-family: monospace;
  text-align: center;
  font-size: 2rem;
  font-weight: bold;
  letter-spacing: 0.25rem;
  margin: 1rem;
  position: relative;
  transition: opacity 0.2s;
}
#play-again-btn {
  position: absolute;
  top: -0.5rem;
  left: 50%;
  margin-left: -50px;
  font-size: 1rem;
  font-weight: bold;
  color: #fff;
  background-color: #111;
	border: 5px double #fff; 
	border-radius: 14px;
	padding: 8px 10px;  
  outline: none;
  letter-spacing: .05em;
  cursor: pointer;
  display: none;
  opacity: 0;
  transition: opacity 0.5s, transform 0.5s, background-color 0.2s;
}
#play-again-btn:hover {
  background-color: #333;
}
#play-again-btn:active {
  background-color: #555;
}
#play-again-btn.play-again-btn-entrance {
  opacity: 1;
  transform: translateX(6rem);
}
.draggable-items {
  display: flex;
  justify-content: center;
  margin: 1rem 1rem 1.5rem 1rem;
  transition: opacity 0.5s;
}
.draggable {
  height: 5rem;
  width: 5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  font-weight: bold;
  margin: 0rem 0.5rem;
  cursor: move;
  transition: opacity 0.2s;
}
.draggable:hover {
  opacity: 0.5;
}
.matching-pairs {
  transition: opacity 0.5s;
}
.matching-pair {
  height: 6rem;
  width: 22rem;
  margin: 1rem auto;
  display: flex;
  justify-content: space-between;
}
.matching-pair span {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  user-select: none;
}
.label {
  width: 15rem;
  font-size: 2rem;
}
.droppable {
  width: 6rem;
  font-size: 4rem;
  background-color: #fff;
  border: 3px dashed #111;
  transition: 0.2s;
}
.droppable-hover {
  background-color: #bee3f0;
  transform: scale(1.1);
}
.dropped {
  border-style: solid;
}
.dragged {
  user-select: none;
  opacity: 0.1;
  cursor: default;
}
.draggable.dragged:hover {
  opacity: 0.1;
}

@media (max-width: 600px) {
  html { font-size: 14px; }
  #play-again-btn { top: -0.4rem; }
  #play-again-btn.play-again-btn-entrance { transform: translateX(7rem); }
}
              
            
!

JS

              
                const brands = [
  {
    iconName: "adobe",
    brandName: "Adobe",
    color: "#ff0000"
  },
  {
    iconName: "airbnb",
    brandName: "Airbnb",
    color: "#fd5c63"
  },
  {
    iconName: "amazon",
    brandName: "Amazon",
    color: "#333333"
  },
  {
    iconName: "android",
    brandName: "Android",
    color: "#a4c639"
  },
  {
    iconName: "angellist",
    brandName: "AngelList",
    color: "#000000"
  },
  {
    iconName: "angular",
    brandName: "Angular",
    color: "#b52e31"
  },
  {
    iconName: "app-store-ios",
    brandName: "App Store",
    color: "#5fc9f8"
  },
  {
    iconName: "apple",
    brandName: "Apple",
    color: "#aaaaaa"
  },
  {
    iconName: "bitcoin",
    brandName: "Bitcoin",
    color: "#d4af37"
  },
  {
    iconName: "blackberry",
    brandName: "BlackBerry",
    color: "#000000" 
  },
  {
    iconName: "blogger",
    brandName: "Blogger",
    color: "#f57d00" 
  },
  {
    iconName: "bluetooth",
    brandName: "Bluetooth",
    color: "#3b5998" 
  },
  {
    iconName: "bootstrap",
    brandName: "Bootstrap",
    color: "#553c7b" 
  },
  {
    iconName: "chrome",
    brandName: "Google Chrome",
    color: "#333333" 
  },
  {
    iconName: "codepen",
    brandName: "CodePen",
    color: "#111111" 
  },
  {
    iconName: "cpanel",
    brandName: "cPanel",
    color: "#ff6c2c" 
  },
  {
    iconName: "css3-alt",
    brandName: "CSS3",
    color: "#264de4" 
  },
  {
    iconName: "dev",
    brandName: "Dev",
    color: "#111111" 
  },
  {
    iconName: "dhl",
    brandName: "DHL",
    color: "#ba0c2f" 
  },
  {
    iconName: "digital-ocean",
    brandName: "DigitalOcean",
    color: "#008bcf" 
  },
  {
    iconName: "discord",
    brandName: "Discord",
    color: "#7289da"
  },
  {
    iconName: "docker",
    brandName: "Docker",
    color: "#0db7ed" 
  },
  {
    iconName: "dribbble",
    brandName: "Dribbble",
    color: "#ea4c89" 
  },
  {
    iconName: "dropbox",
    brandName: "Dropbox",
    color: "#007ee5" 
  },
  {
    iconName: "drupal",
    brandName: "Drupal",
    color: "#0077c0" 
  },
  {
    iconName: "ebay",
    brandName: "eBay",
    color: "#333333" 
  },
  {
    iconName: "edge",
    brandName: "Microsoft Edge",
    color: "#0078d7" 
  },
  {
    iconName: "ember",
    brandName: "Ember.js",
    color: "#f23819" 
  },
  {
    iconName: "ethereum",
    brandName: "Ethereum",
    color: "#666666" 
  },
  {
    iconName: "etsy",
    brandName: "Etsy",
    color: "#d5641c" 
  },
  {
    iconName: "evernote",
    brandName: "Evernote",
    color: "#2dbe60" 
  },
  {
    iconName: "facebook-square",
    brandName: "Facebook",
    color: "#3b5998" 
  },
  {
    iconName: "fedex",
    brandName: "FedEx",
    color: "#4d148c"
  },
  {
    iconName: "firefox",
    brandName: "Firefox",
    color: "#e66000" 
  },
  {
    iconName: "font-awesome",
    brandName: "Font Awesome",
    color: "#228ae6" 
  },
  {
    iconName: "free-code-camp",
    brandName: "freeCodeCamp",
    color: "#006400" 
  },
  {
    iconName: "git-alt",
    brandName: "Git",
    color: "#f1502f" 
  },
  {
    iconName: "github",
    brandName: "GitHub",
    color: "#333333" 
  },
  {
    iconName: "google",
    brandName: "Google",
    color: "#333333" 
  },
  {
    iconName: "google-play",
    brandName: "Google Play",
    color: "#3bccff" 
  },
  {
    iconName: "grunt",
    brandName: "Grunt",
    color: "#fba919" 
  },
  {
    iconName: "gulp",
    brandName: "gulp.js",
    color: "#db4446" 
  },
  {
    iconName: "html5",
    brandName: "HTML5",
    color: "#e34f26" 
  },
  {
    iconName: "imdb",
    brandName: "IMDb",
    color: "#dba506"
  },
  {
    iconName: "instagram",
    brandName: "Instagram",
    color: "#e1306c" 
  },
  {
    iconName: "internet-explorer",
    brandName: "Internet Explorer",
    color: "#1ebbee" 
  },
  {
    iconName: "itunes",
    brandName: "iTunes",
    color: "#ea4cc0" 
  },
  {
    iconName: "java",
    brandName: "Java",
    color: "#5382a1" 
  },
  {
    iconName: "js-square",
    brandName: "JavaScript",
    color: "#333333" 
  },
  {
    iconName: "jsfiddle",
    brandName: "JSFiddle",
    color: "#333333" 
  },
  {
    iconName: "kickstarter",
    brandName: "Kickstarter",
    color: "#2bde73" 
  },
  {
    iconName: "laravel",
    brandName: "Laravel",
    color: "#f55247" 
  },
  {
    iconName: "less",
    brandName: "Less",
    color: "#00316e" 
  },
  {
    iconName: "linkedin",
    brandName: "LinkedIn",
    color: "#0077b5" 
  },
  {
    iconName: "linux",
    brandName: "Linux",
    color: "#000000" 
  },
  {
    iconName: "mailchimp",
    brandName: "Mailchimp",
    color: "#239ab9" 
  },
  {
    iconName: "medium",
    brandName: "Medium",
    color: "#00ab6c" 
  },
  {
    iconName: "meetup",
    brandName: "Meetup",
    color: "#e0393e" 
  },
  {
    iconName: "microsoft",
    brandName: "Microsoft",
    color: "#111111" 
  },
  {
    iconName: "napster",
    brandName: "Napster",
    color: "#111111" 
  },
  {
    iconName: "node",
    brandName: "Node.js",
    color: "#68a063"
  },
  {
    iconName: "npm",
    brandName: "npm",
    color: "#cc3534" 
  },
  {
    iconName: "opera",
    brandName: "Opera",
    color: "#cc0f16" 
  },
  {
    iconName: "patreon",
    brandName: "Patreon",
    color: "#f96854" 
  },
  {
    iconName: "paypal",
    brandName: "PayPal",
    color: "#003087" 
  },
  {
    iconName: "php",
    brandName: "PHP",
    color: "#8892be" 
  },
  {
    iconName: "pinterest",
    brandName: "Pinterest",
    color: "#bd081c" 
  },
  {
    iconName: "playstation",
    brandName: "PlayStation",
    color: "#003087" 
  },
  {
    iconName: "product-hunt",
    brandName: "Product Hunt",
    color: "#da552f" 
  },
  {
    iconName: "python",
    brandName: "Python",
    color: "#4584b6" 
  },
  {
    iconName: "quora",
    brandName: "Quora",
    color: "#a82400" 
  },
  {
    iconName: "react",
    brandName: "React",
    color: "#00d8ff" 
  },
  {
    iconName: "reddit",
    brandName: "reddit",
    color: "#ff4500" 
  },
  {
    iconName: "safari",
    brandName: "Safari",
    color: "#0fb5ee" 
  },
  {
    iconName: "sass",
    brandName: "Sass",
    color: "#cd6799" 
  },
  {
    iconName: "skype",
    brandName: "Skype",
    color: "#00aff0" 
  },
  {
    iconName: "slack",
    brandName: "Slack",
    color: "#3eb991" 
  },
  {
    iconName: "snapchat-square",
    brandName: "Snapchat",
    color: "#fffc00" 
  },
  {
    iconName: "soundcloud",
    brandName: "SoundCloud",
    color: "#ff8800" 
  },
  {
    iconName: "spotify",
    brandName: "Spotify",
    color: "#1db954" 
  },
  {
    iconName: "squarespace",
    brandName: "Squarespace",
    color: "#222222" 
  },
  {
    iconName: "stack-overflow",
    brandName: "Stack Overflow",
    color: "#f48024" 
  },
  {
    iconName: "stripe",
    brandName: "Stripe",
    color: "#00afe1" 
  },
  {
    iconName: "trello",
    brandName: "Trello",
    color: "#0079bf" 
  },
  {
    iconName: "tripadvisor",
    brandName: "TripAdvisor",
    color: "#00af87" 
  },
  {
    iconName: "twitch",
    brandName: "Twitch",
    color: "#6441a5" 
  },
  {
    iconName: "twitter",
    brandName: "Twitter",
    color: "#1da1f2" 
  },
  {
    iconName: "uber",
    brandName: "Uber",
    color: "#09091a" 
  },
  {
    iconName: "viber",
    brandName: "Viber",
    color: "#59267c" 
  },
  {
    iconName: "vimeo",
    brandName: "Vimeo",
    color: "#1ab7ea" 
  },
  {
    iconName: "vk",
    brandName: "VKontakte",
    color: "#45668e"
  },
  {
    iconName: "vuejs",
    brandName: "Vue.js",
    color: "#42b883" 
  },
  {
    iconName: "whatsapp",
    brandName: "WhatsApp",
    color: "#075e54" 
  },
  {
    iconName: "wikipedia-w",
    brandName: "Wikipedia",
    color: "#000000" 
  },
  {
    iconName: "windows",
    brandName: "Microsoft Windows",
    color: "#0078d7" 
  },
  {
    iconName: "wix",
    brandName: "Wix.com",
    color: "#333333" 
  },
  {
    iconName: "wordpress",
    brandName: "WordPress",
    color: "#21759b" 
  },
  {
    iconName: "xbox",
    brandName: "Xbox",
    color: "#52b043" 
  },
  {
    iconName: "yahoo",
    brandName: "Yahoo!",
    color: "#410093" 
  },
  {
    iconName: "youtube",
    brandName: "YouTube",
    color: "#ff0000" 
  }
];
let correct = 0;
let total = 0;
const totalDraggableItems = 5;
const totalMatchingPairs = 5; // Should be <= totalDraggableItems

const scoreSection = document.querySelector(".score");
const correctSpan = scoreSection.querySelector(".correct");
const totalSpan = scoreSection.querySelector(".total");
const playAgainBtn = scoreSection.querySelector("#play-again-btn");

const draggableItems = document.querySelector(".draggable-items");
const matchingPairs = document.querySelector(".matching-pairs");
let draggableElements;
let droppableElements;

initiateGame();

function initiateGame() {
  const randomDraggableBrands = generateRandomItemsArray(totalDraggableItems, brands);
  const randomDroppableBrands = totalMatchingPairs<totalDraggableItems ? generateRandomItemsArray(totalMatchingPairs, randomDraggableBrands) : randomDraggableBrands;
  const alphabeticallySortedRandomDroppableBrands = [...randomDroppableBrands].sort((a,b) => a.brandName.toLowerCase().localeCompare(b.brandName.toLowerCase()));
  
  // Create "draggable-items" and append to DOM
  for(let i=0; i<randomDraggableBrands.length; i++) {
    draggableItems.insertAdjacentHTML("beforeend", `
      <i class="fab fa-${randomDraggableBrands[i].iconName} draggable" draggable="true" style="color: ${randomDraggableBrands[i].color};" id="${randomDraggableBrands[i].iconName}"></i>
    `);
  }
  
  // Create "matching-pairs" and append to DOM
  for(let i=0; i<alphabeticallySortedRandomDroppableBrands.length; i++) {
    matchingPairs.insertAdjacentHTML("beforeend", `
      <div class="matching-pair">
        <span class="label">${alphabeticallySortedRandomDroppableBrands[i].brandName}</span>
        <span class="droppable" data-brand="${alphabeticallySortedRandomDroppableBrands[i].iconName}"></span>
      </div>
    `);
  }
  
  draggableElements = document.querySelectorAll(".draggable");
  droppableElements = document.querySelectorAll(".droppable");
  
  draggableElements.forEach(elem => {
    elem.addEventListener("dragstart", dragStart);
    // elem.addEventListener("drag", drag);
    // elem.addEventListener("dragend", dragEnd);
  });
  
  droppableElements.forEach(elem => {
    elem.addEventListener("dragenter", dragEnter);
    elem.addEventListener("dragover", dragOver);
    elem.addEventListener("dragleave", dragLeave);
    elem.addEventListener("drop", drop);
  });
}

// Drag and Drop Functions

//Events fired on the drag target

function dragStart(event) {
  event.dataTransfer.setData("text", event.target.id); // or "text/plain"
}

//Events fired on the drop target

function dragEnter(event) {
  if(event.target.classList && event.target.classList.contains("droppable") && !event.target.classList.contains("dropped")) {
    event.target.classList.add("droppable-hover");
  }
}

function dragOver(event) {
  if(event.target.classList && event.target.classList.contains("droppable") && !event.target.classList.contains("dropped")) {
    event.preventDefault();
  }
}

function dragLeave(event) {
  if(event.target.classList && event.target.classList.contains("droppable") && !event.target.classList.contains("dropped")) {
    event.target.classList.remove("droppable-hover");
  }
}

function drop(event) {
  event.preventDefault();
  event.target.classList.remove("droppable-hover");
  const draggableElementBrand = event.dataTransfer.getData("text");
  const droppableElementBrand = event.target.getAttribute("data-brand");
  const isCorrectMatching = draggableElementBrand===droppableElementBrand;
  total++;
  if(isCorrectMatching) {
    const draggableElement = document.getElementById(draggableElementBrand);
    event.target.classList.add("dropped");
    draggableElement.classList.add("dragged");
    draggableElement.setAttribute("draggable", "false");
    event.target.innerHTML = `<i class="fab fa-${draggableElementBrand}" style="color: ${draggableElement.style.color};"></i>`;
    correct++;  
  }
  scoreSection.style.opacity = 0;
  setTimeout(() => {
    correctSpan.textContent = correct;
    totalSpan.textContent = total;
    scoreSection.style.opacity = 1;
  }, 200);
  if(correct===Math.min(totalMatchingPairs, totalDraggableItems)) { // Game Over!!
    playAgainBtn.style.display = "block";
    setTimeout(() => {
      playAgainBtn.classList.add("play-again-btn-entrance");
    }, 200);
  }
}

// Other Event Listeners
playAgainBtn.addEventListener("click", playAgainBtnClick);
function playAgainBtnClick() {
  playAgainBtn.classList.remove("play-again-btn-entrance");
  correct = 0;
  total = 0;
  draggableItems.style.opacity = 0;
  matchingPairs.style.opacity = 0;
  setTimeout(() => {
    scoreSection.style.opacity = 0;
  }, 100);
  setTimeout(() => {
    playAgainBtn.style.display = "none";
    while (draggableItems.firstChild) draggableItems.removeChild(draggableItems.firstChild);
    while (matchingPairs.firstChild) matchingPairs.removeChild(matchingPairs.firstChild);
    initiateGame();
    correctSpan.textContent = correct;
    totalSpan.textContent = total;
    draggableItems.style.opacity = 1;
    matchingPairs.style.opacity = 1;
    scoreSection.style.opacity = 1;
  }, 500);
}

// Auxiliary functions
function generateRandomItemsArray(n, originalArray) {
  let res = [];
  let clonedArray = [...originalArray];
  if(n>clonedArray.length) n=clonedArray.length;
  for(let i=1; i<=n; i++) {
    const randomIndex = Math.floor(Math.random()*clonedArray.length);
    res.push(clonedArray[randomIndex]);
    clonedArray.splice(randomIndex, 1);
  }
  return res;
}
              
            
!
999px

Console