Build a playable Piano using Html, CSS and JavaScript with source code

In this article, we will create a working piano using HTML, CSS and JavaScript.The piano is a keyboard musical instrument with strings that produce sound when struck by felt-covered hammers operated from a keyboard. It is also called the pianoforte.

01. HTML Code :-

<link rel="stylesheet" href="style.css">
<body>
    <section id="wrap">
      <header>
        <h1>Piano</h1>
        <h2>Use your keyboard to play piano</h2>
      </header>
      <section id="main">
        <div class="nowplaying"></div>
        <div class="keys">
          <div data-key="65" class="key" data-note="C">
              <span class="hints">A</span>
          </div>
          <div data-key="87" class="key sharp" data-note="C#">
              <span class="hints">W</span>
          </div>
          <div data-key="83" class="key" data-note="D">
              <span class="hints">S</span>
          </div>
          <div data-key="69" class="key sharp" data-note="D#">
              <span class="hints">E</span>
          </div>
          <div data-key="68" class="key" data-note="E">
              <span class="hints">D</span>
          </div>
          <div data-key="70" class="key" data-note="F">
              <span class="hints">F</span>
          </div>
          <div data-key="84" class="key sharp" data-note="F#">
              <span class="hints">T</span>
          </div>
          <div data-key="71" class="key" data-note="G">
              <span class="hints">G</span>
          </div>
          <div data-key="89" class="key sharp" data-note="G#">
              <span class="hints">Y</span>
          </div>
          <div data-key="72" class="key" data-note="A">
              <span class="hints">H</span>
          </div>
          <div data-key="85" class="key sharp" data-note="A#">
              <span class="hints">U</span>
          </div>
          <div data-key="74" class="key" data-note="B">
              <span class="hints">J</span>
          </div>
          <div data-key="75" class="key" data-note="C">
              <span class="hints">K</span>
          </div>
          <div data-key="79" class="key sharp" data-note="C#">
              <span class="hints">O</span>
          </div>
          <div data-key="76" class="key" data-note="D">
              <span class="hints">L</span>
          </div>
          <div data-key="80" class="key sharp" data-note="D#">
              <span class="hints">P</span>
          </div>
          <div data-key="186" class="key" data-note="E">
              <span class="hints">;</span>
          </div>
        </div>
  
        <audio data-key="65" src="http://carolinegabriel.com/demo/js-keyboard/sounds/040.wav"></audio>
        <audio data-key="87" src="http://carolinegabriel.com/demo/js-keyboard/sounds/041.wav"></audio>
        <audio data-key="83" src="http://carolinegabriel.com/demo/js-keyboard/sounds/042.wav"></audio>
        <audio data-key="69" src="http://carolinegabriel.com/demo/js-keyboard/sounds/043.wav"></audio>
        <audio data-key="68" src="http://carolinegabriel.com/demo/js-keyboard/sounds/044.wav"></audio>
        <audio data-key="70" src="http://carolinegabriel.com/demo/js-keyboard/sounds/045.wav"></audio>
        <audio data-key="84" src="http://carolinegabriel.com/demo/js-keyboard/sounds/046.wav"></audio>
        <audio data-key="71" src="http://carolinegabriel.com/demo/js-keyboard/sounds/047.wav"></audio>
        <audio data-key="89" src="http://carolinegabriel.com/demo/js-keyboard/sounds/048.wav"></audio>
        <audio data-key="72" src="http://carolinegabriel.com/demo/js-keyboard/sounds/049.wav"></audio>
        <audio data-key="85" src="http://carolinegabriel.com/demo/js-keyboard/sounds/050.wav"></audio>
        <audio data-key="74" src="http://carolinegabriel.com/demo/js-keyboard/sounds/051.wav"></audio>
        <audio data-key="75" src="http://carolinegabriel.com/demo/js-keyboard/sounds/052.wav"></audio>
        <audio data-key="79" src="http://carolinegabriel.com/demo/js-keyboard/sounds/053.wav"></audio>
        <audio data-key="76" src="http://carolinegabriel.com/demo/js-keyboard/sounds/054.wav"></audio>
        <audio data-key="80" src="http://carolinegabriel.com/demo/js-keyboard/sounds/055.wav"></audio>
        <audio data-key="186" src="http://carolinegabriel.com/demo/js-keyboard/sounds/056.wav"></audio>
        </section>
    </section>
    </video>
    </body>
    <script src="script.js"></script>

02. CSS Code :-

html  {
    background: #000;
    font-family: 'Noto Serif', serif;
    -webkit-font-smoothing: antialiased;
    text-align: center;
  }

header {
  position: relative;
  margin: 30px 0;
}

header:after {
  content: '';
  width: 460px;
  height: 15px;
  background: url(images/intro-div.svg) no-repeat center;
  display: inline-block;
  text-align: center;
  background-size: 70%;
}

h1 {
  color: #a94444;
  font-size: 50px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0;
}

h2 {
  color: #c9c5ac;
  font-size: 24px;
  font-style: italic;
  font-weight: 400;
  margin: 0 0 30px;
}

.nowplaying {
  font-size: 120px;
  line-height: 1;
  color: #eee;
  text-shadow: 0 0 5rem #ff03ff;
  transition: all .07s ease;
  min-height: 120px;
}

.keys {
  display: block;
  width: 100%;
  height: 350px;
  max-width: 880px;
  position: relative;
  margin: 40px auto 0;
  cursor: none;
}

.key {
  position: relative;
  border: 4px solid black;
  border-radius: .5rem;
  transition: all .07s ease;
  display: block;
  box-sizing: border-box;
  z-index: 2;
}

.key:not(.sharp) {
  float: left;
  width: 10%;
  height: 100%;
  background: rgba(255, 255, 255, .8);    
}

.key.sharp {
  position: absolute;
  width: 6%;
  height: 60%;
  background: #000;
  color: #eee;
  top: 0;
  z-index: 3;
}

.key[data-key="87"] {
  left: 7%;
}

.key[data-key="69"] {
  left: 17%;
}

.key[data-key="84"]  {
  left: 37%;
}

.key[data-key="89"] {
  left: 47%;
}

.key[data-key="85"] {
  left: 57%;    
}

.key[data-key="79"] {
  left: 77%;    
}

.key[data-key="80"] {
  left: 87%;    
}

.playing {
  transform: scale(.95);
  border-color: #ea02ff;
  box-shadow: 0 0 1rem #ea02ff;
}

.hints {
  display: block;
  width: 100%;
  opacity: 0;
  position: absolute;
  bottom: 7px;
  transition: opacity .3s ease-out;
  font-size: 20px;
}

.keys:hover .hints {
  opacity: 1;
}

03. JavaScript Code :-

const keys = document.querySelectorAll(".key"),
  note = document.querySelector(".nowplaying"),
  hints = document.querySelectorAll(".hints");

function playNote(e) {
  const audio = document.querySelector(`audio[data-key="${e.keyCode}"]`),
    key = document.querySelector(`.key[data-key="${e.keyCode}"]`);

  if (!key) return;

  const keyNote = key.getAttribute("data-note");

  key.classList.add("playing");
  note.innerHTML = keyNote;
  audio.currentTime = 0;
  audio.play();
}

function removeTransition(e) {
  if (e.propertyName !== "transform") return;
  this.classList.remove("playing");
}

function hintsOn(e, index) {
  e.setAttribute("style", "transition-delay:" + index * 50 + "ms");
}

hints.forEach(hintsOn);

keys.forEach(key => key.addEventListener("transitionend", removeTransition));

window.addEventListener("keydown", playNote);

OutPut :-

Piano codejuster