CodePen Embed - JavaScript Drum Kit

<main>
  <section class="main-wrapper">
    <div class="key-map-wrapper">
      <h2>Key Mapping</h2>
      <ul class="key-map-list">
        <li>
          <kbd class="key-code">E</kbd>
          <span class="key-sound">Crash</span>
        </li>
        <li>
          <kbd class="key-code">R</kbd>
          <span class="key-sound">Ride</span>
        </li>
        <li>
          <kbd class="key-code">F</kbd>
          <span class="key-sound">Floor tom</span>
        </li>
        <li>
          <kbd class="key-code">G</kbd>
          <span class="key-sound">Mid tom</span>
        </li>
        <li>
          <kbd class="key-code">H</kbd>
          <span class="key-sound">High tom</span>
        </li>
        <li>
          <kbd class="key-code">V</kbd>
          <kbd class="key-code">B</kbd>
          <span class="key-sound">Kick</span>
        </li>
        <li>
          <kbd class="key-code">J</kbd>
          <span class="key-sound">Snare</span>
        </li>
        <li>
          <kbd class="key-code">I</kbd>
          <span class="key-sound">Hi-Hat Open</span>
        </li>
        <li>
          <kbd class="key-code">K</kbd>
          <span class="key-sound">Hi-Hat Closed</span>
        </li>
      </ul>
    </div>
    <h1 class="main-title">JavaScript Drum Kit</h1>
    <div class="drum-kit-wrapper">
      <img id="crash-ride" class="crash-cymbal" src="https://raw.githubusercontent.com/ArunMichaelDsouza/javascript-30-course/master/src/01-javascript-drum-kit/img/crash.png" alt="Crash cymbal">
      <img id="hihat-top" class="hihat-top-cymbal" src="https://raw.githubusercontent.com/ArunMichaelDsouza/javascript-30-course/master/src/01-javascript-drum-kit/img/hihat-top.png" alt="Hi Hat cymbal">
      <div data-key="74" class="key snare">
        <kbd>J</kbd>
      </div>
      <div data-key="66" class="key kick">
        <kbd>B</kbd>
      </div>
      <div data-key="86" class="key kick2">
        <kbd>V</kbd>
      </div>
      <div data-key="72" class="key tom-high">
        <kbd>H</kbd>
      </div>
      <div data-key="71" class="key tom-mid">
        <kbd>G</kbd>
      </div>
      <div data-key="70" class="key tom-low">
        <kbd>F</kbd>
      </div>
      <div data-key="69" class="key crash">
        <kbd>E</kbd>
      </div>
      <div data-key="82" class="key ride">
        <kbd>R</kbd>
      </div>
      <div data-key="73" class="key hihat-open">
        <kbd>I</kbd>
      </div>
      <div data-key="75" class="key hihat-close">
        <kbd>K</kbd>
      </div>
      <img class="drum-kit" src="https://raw.githubusercontent.com/ArunMichaelDsouza/javascript-30-course/master/src/01-javascript-drum-kit/img/drum-kit.png" alt="Drum Kit" />
    </div>
  </section>
</main>
<audio data-key="74" src="https://raw.githubusercontent.com/ArunMichaelDsouza/javascript-30-course/master/src/01-javascript-drum-kit/sounds/snare.wav"></audio>
<audio data-key="66" src="https://raw.githubusercontent.com/ArunMichaelDsouza/javascript-30-course/master/src/01-javascript-drum-kit/sounds/kick.wav"></audio>
<audio data-key="86" src="https://raw.githubusercontent.com/ArunMichaelDsouza/javascript-30-course/master/src/01-javascript-drum-kit/sounds/kick.wav"></audio>
<audio data-key="72" src="https://raw.githubusercontent.com/ArunMichaelDsouza/javascript-30-course/master/src/01-javascript-drum-kit/sounds/tom-high.wav"></audio>
<audio data-key="71" src="https://raw.githubusercontent.com/ArunMichaelDsouza/javascript-30-course/master/src/01-javascript-drum-kit/sounds/tom-mid.wav"></audio>
<audio data-key="70" src="https://raw.githubusercontent.com/ArunMichaelDsouza/javascript-30-course/master/src/01-javascript-drum-kit/sounds/tom-low.wav"></audio>
<audio data-key="69" src="https://raw.githubusercontent.com/ArunMichaelDsouza/javascript-30-course/master/src/01-javascript-drum-kit/sounds/crash.wav"></audio>
<audio data-key="82" src="https://raw.githubusercontent.com/ArunMichaelDsouza/javascript-30-course/master/src/01-javascript-drum-kit/sounds/ride.wav"></audio>
<audio data-key="73" src="https://raw.githubusercontent.com/ArunMichaelDsouza/javascript-30-course/master/src/01-javascript-drum-kit/sounds/hihat-open.wav"></audio>
<audio data-key="75" src="https://raw.githubusercontent.com/ArunMichaelDsouza/javascript-30-course/master/src/01-javascript-drum-kit/sounds/hihat-close.wav"></audio>

@import url(https://fonts.googleapis.com/css?family=Handlee|Pacifico);

html,
body {
  padding: 0;
  margin: 0;
  background-color: #fff;
}

.main-wrapper {
  margin: 30px auto 0;
  width: 1080px;
  text-align: center;
}

.main-title {
  font-family: 'Pacifico', cursive;
  text-align: center;
  font-size: 3.2em;
  color: #cb2026;
  text-shadow: 1px 1px 1px #5a0b0d;
}

.drum-kit-wrapper {
  position: relative;
  width: 600px;
  margin: -100px auto 0;
}

.drum-kit {
  width: 100%;
  height: 520px;
  position: relative;
}

.crash-cymbal {
  position: absolute;
  top: 114px;
    left: 80px;
    transform: rotate(-7.2deg) scale(1.5);
    transition: all ease-in-out .042s;
}

.hihat-top-cymbal {
  position: absolute;
    top: 166px;
    right: 71px;
    transform: scale(1.35);
    z-index: 0;
    transition: all ease-in-out .042s;
}

.key {
  display: inline-block;
  transition: all ease-in-out .042s;
  position: absolute;
  background: #eaeaea;
    font-size: 1.5em;
    height: 32px;
    width: 32px;
    text-align: center;
    border-radius: 4px;
    border: 3px solid #aaa;
    color: #444;
    box-shadow: 1px 1px 1px rgba(0,0,0,.65);
    z-index: 2;
}

.key.kick {
  top: 355px;
    right: 250px;
}

.key.kick2 {
    top: 355px;
    right: 308px;
}

.key.snare {
  right: 145px;
    top: 280px;
}

.key.tom-high {
  right: 227px;
    top: 240px;
}

.key.tom-mid {
  left: 222px;
    top: 220px;
}

.key.tom-low {
  top: 320px;
    left: 133px;
}

.key.crash {
  top: 80px;
    left: 75px;
}

.key.ride {
  left: 165px;
    top: 87px;
}

.key.hihat-open {
  right: 165px;
    top: 144px;
}

.key.hihat-close {
  right: 60px;
    top: 150px;
}

.playing {
  transform: scale(1.12);
}

.key-map-wrapper {
  position: absolute;
    right: 0;
    top: 0;
    height: 700px;
    background: #111;
    width: 250px;
    z-index: 3;
}

.key-map-wrapper > h2 {
  color: #fff;
  font-family: 'Handlee', cursive;
  margin-bottom: 35px;
  border-bottom: 1px solid #fff;
    padding-bottom: 20px;
}

.key-map-list {
  list-style: none;
  color: #fff;
  text-align: left;
}

.key-map-list > li {
  margin-bottom: 25px;
}

.key-code {
  color: #444;
    background-color: #eaeaea;
    font-size: 1.25em;
    padding: 5px 10px;
    border-radius: 4px;
    border: 3px solid #aaa;
}

.key-sound {
  font-size: 1.2em;
  margin-left: 10px;
  font-family: 'Handlee', cursive;
  vertical-align: middle;
}

// JavaScript Drum Kit App

{
  const playingClass = 'playing',
    crashRide = document.getElementById('crash-ride'),
    hiHatTop = document.getElementById('hihat-top');

  const animateCrashOrRide = () => {
    crashRide.style.transform = 'rotate(0deg) scale(1.5)';
  };

  const animateHiHatClosed = () => {
    hiHatTop.style.top = '171px';
  };

  const playSound = e => {
    const keyCode = e.keyCode,
      keyElement = document.querySelector(`div[data-key="${keyCode}"]`);

    if(!keyElement) return;

    const audioElement = document.querySelector(`audio[data-key="${keyCode}"]`);
    audioElement.currentTime = 0;
    audioElement.play();

    switch(keyCode) {
      case 69:
      case 82:
        animateCrashOrRide();
        break;
      case 75:
        animateHiHatClosed();
        break;
    }

    keyElement.classList.add(playingClass);
  };

  const removeCrashRideTransition = e => {
    if(e.propertyName !== 'transform') return;

    e.target.style.transform = 'rotate(-7.2deg) scale(1.5)';
  };

  const removeHiHatTopTransition = e => {
    if(e.propertyName !== 'top') return;

    e.target.style.top = '166px';
  };  

  const removeKeyTransition = e => {
    if(e.propertyName !== 'transform') return;

    e.target.classList.remove(playingClass)
  };

  const drumKeys = Array.from(document.querySelectorAll('.key'));

  drumKeys.forEach(key => {
    key.addEventListener('transitionend', removeKeyTransition);
  });

  crashRide.addEventListener('transitionend', removeCrashRideTransition);
  hiHatTop.addEventListener('transitionend', removeHiHatTopTransition);

  window.addEventListener('keydown', playSound);
}

This Pen is owned by Arun Michael Dsouza on CodePen.

See more by @amdsouza92 on CodePen

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.