JS Piano

by Paul Leech

HTML

<section>
  <button id="C2" data-note="C2" class="C keys oct2 wht"></button>
  <button id="Db2" data-note="Db2" class="Db keys oct2 blk"></button>
  <button id="D2" data-note="D2" class="D keys oct2 wht"></button>
  <button id="Eb2" data-note="Eb2" class="Eb keys oct2 blk"></button>
  <button id="E2" data-note="E2" class="E keys oct2 wht"></button>
  <button id="F2" data-note="F2" class="F keys oct2 wht"></button>
  <button id="Gb2" data-note="Gb2" class="Gb keys oct2 blk"></button>
  <button id="G2" data-note="G2" class="G keys oct2 wht"></button>
  <button id="Ab2" data-note="Ab2" class="Ab keys oct2 blk"></button>
  <button id="A2" data-note="A2" class="A keys oct2 wht"></button>
  <button id="Bb2" data-note="Bb2" class="Bb keys oct2 blk"></button>
  <button id="B2" data-note="B2" class="B keys oct2 wht"></button>

  <button id="C3" data-note="C3" class="C keys oct3 wht"></button>
  <button id="Db3" data-note="Db3" class="Db keys oct3 blk"></button>
  <button id="D3" data-note="D3" class="D keys oct3 wht"></button>
  <button id="Eb3" data-note="Eb3" class="Eb keys oct3 blk"></button>
  <button id="E3" data-note="E3" class="E keys oct3 wht"></button>
  <button id="F3" data-note="F3" class="F keys oct3 wht"></button>
  <button id="Gb3" data-note="Gb3" class="Gb keys oct3 blk"></button>
  <button id="G3" data-note="G3" class="G keys oct3 wht"></button>
  <button id="Ab3" data-note="Ab3" class="Ab keys oct3 blk"></button>
  <button id="A3" data-note="A3" class="A keys oct3 wht"></button>
  <button id="Bb3" data-note="Bb3" class="Bb keys oct3 blk"></button>
  <button id="B3" data-note="B3" class="B keys oct3 wht"></button>

  <button id="C4" data-note="C4" class="C keys oct4 wht"></button>
  <button id="Db4" data-note="Db4" class="Db keys oct4 blk"></button>
  <button id="D4" data-note="D4" class="D keys oct4 wht"></button>
  <button id="Eb4" data-note="Eb4" class="Eb keys oct4 blk"></button>
  <button id="E4" data-note="E4" class="E keys oct4 wht"></button>
 ...

CSS

body {
  background: #044;
}
section {
  font-family: sans-serif;
  width: 750px;
  margin: 0 auto;
  text-align: center;
  background-color: transparent;
}
.key {
  background-color: #00f;
}
.keys {
  padding: 0;
  position: relative;
  z-index: 1;
  background-position: top center;
  background-repeat: no-repeat;
  width: 20px;
  vertical-align: top;
  background-size: cover;
  /* background-color: transparent;  */
}
.wht {
  width: 20px;
  height: 150px;
}
.blk {
  width: 15px;
  height: 95px;
  z-index: 2;
}

.C {
  margin-left: -3.5px;
}
.Db {
  margin-left: -14px;
  width: 15px;
}
.D {
  margin-left: -8.5px;
}
.Eb {
  margin-left: -10px;
  width: 15px;
}
.E {
  margin-left: -11.75px;
}
.F {
  margin-left: -3.25px;
}
.Gb {
  margin-left: -14px;
  width: 15px;
}
.G {
  margin-left: -9px;
}
.Ab {
  margin-left: -12px;
  width: 15px;
}
.A {
  margin-left: -10.5px;
}
.Bb {
  margin-left: -12px;
}
.B {
  margin-left: -11px;
}
.C8 {
  margin-left: -3px;
}

.C,
.F {
  background-image: url(https://notation.netcentrx.net/piano-grid/img/w01.svg);
}
.D,
.G,
.A {
  background-image: url(https://notation.netcentrx.net/piano-grid/img/w02.svg);
}
.E,
.B {
  background-image: url(https://notation.netcentrx.net/piano-grid/img/w03.svg);
}
.Db,
.Eb,
.Gb,
.Ab,
.Bb {
  background-image: url(https://notation.netcentrx.net/piano-grid/img/b02.svg);
}
.A1 {
  background-image: url(https://notation.netcentrx.net/player/img/w00.svg);
}
.C8 {
  background-image: url(https://notation.netcentrx.net/player/img/w04.svg);
}
button:active,
button.blk:active {
  background: rgba(200, 200, 0, 0.1);
}

button {
  border: none;
  cursor: pointer;
}

#oct1,
#oct2,
#oct3,
#oct4,
#oct5,
#oct6,
#oct7 {
  position: absolute;
  width: 146px;
  background: #033;
  left: 50%;
  margin-top: 5px;
  border-radius: 5px;
  cursor: pointer;
}

#oct1 {
  margin-left: -516px;
}
#oct2 {
  margin-left: -366px;
}
#oct3 {
  margin-left: -217px;
}
#oct4 {
  margin-left: -68px;
}
#oct5 {
  margin-left: 80px;
}
#oct6...

JavaScript

const now_playing = document.getElementById("now_playing");
const allButtons = document.querySelectorAll("button");
// const oct1 = document.getElementById('oct1');
const oct2 = document.getElementById("oct2");
const oct3 = document.getElementById("oct3");
const oct4 = document.getElementById("oct4");
const oct5 = document.getElementById("oct5");
const oct6 = document.getElementById("oct6");
// const oct7 = document.getElementById('oct7');
// const oct1All = document.querySelectorAll('.oct1');
const oct2All = document.querySelectorAll(".oct2");
const oct3All = document.querySelectorAll(".oct3");
const oct4All = document.querySelectorAll(".oct4");
const oct5All = document.querySelectorAll(".oct5");
const oct6All = document.querySelectorAll(".oct6");
// const oct7All = document.querySelectorAll('.oct7');
const keys = document.querySelectorAll(".keys");
const octave = document.querySelectorAll(".octave");
const chords = document.getElementById("chords");

// function play2(id){
//     if(document.getElementById('_'+id)) {
//         audio = document.getElementById('_'+id);
//         clearInterval(int);
//         audio.currentTime = 0.5;
//         audio.play();
//     }
// }

// function stop(){
//     audio.stop();
// }

// function pause(id){
//     audio = document.getElementById('_'+id);
//     audio.pause();
// }

// function play(id) {
//     //   let note = id.toUpperCase();
//     alert(id);
//     document.getElementById('_'+id).play();
// }

function playNote(file) {
  var audio = document.createElement("audio");
  audio.src = "https://js.netcentrx.net/_media/" + file + ".mp3";
  // console.log(audio.src);
  document.body.appendChild(audio);
  audio.play();

  audio.onended = function () {
    this.parentNode.removeChild(this);
  };
}

allButtons.forEach(function (button) {
  button.addEventListener("click", () => {
    removeHilite();
    //console.log(button.dataset.note);
    // let thisID = button.dataset.note.replace('_', '');
    let thisID =...