--description--

Notice that the album art in the HTML and songs in the userData.songs array have changed. We've swapped out the original songs for shorter ones that you can use to test your app.

All the core functionalities are now in place. The only issue now is that the next song does not automatically play when the currently playing song ends.

To fix that, you can set up an event listener which will detect when the currently playing song ends. The "ended" event listener is appropriate for this. It is fired when the playback of a media reaches the end.

Add an event listener to the audio element which listens for the "ended" event and pass in a reference to the playNextSong function. With that the music player project is complete!

--hints--

You should chain the addEventListener() method to your audio variable.

assert.match(__helpers.removeJSComments(code), /audio\.addEventListener\(/)

The event listener you used on your audio variable should listen for an "ended" event.

assert.match(__helpers.removeJSComments(code), /audio\.addEventListener\(\s*('|")ended\1/)

You should pass in a reference to playNextSong to your "ended" event listener.

assert.match(__helpers.removeJSComments(code), /audio\.addEventListener\(\s*('|")ended\1\s*,\s*playNextSong\s*\)\s*;?/)

--seed--

--seed-contents--

html

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <link href="https://fonts.googleapis.com/css2?family=Roboto+Mono&display=swap" rel="stylesheet" />
  <link href="https://fonts.googleapis.com/css2?family=Lato&family=Roboto+Mono&display=swap" rel="stylesheet" />
  <link rel="stylesheet" href="styles.css" />
  <title>
    Build a Music Player App
  </title>
</head>

<body>
  <div class="container">
    <div class="player">
      <div class="player-bar">
        <div class="parallel-lines">
          <div></div>
          <div></div>
        </div>
        <h1 class="fcc-title">freeCodeCamp</h1>
        <div class="parallel-lines">
          <div></div>
          <div></div>
        </div>
      </div>
      <div class="player-content">
        <div id="player-album-art">
          
        </div>
        <div class="player-display">
          <div class="player-display-song-artist">
            <p id="player-song-title"></p>
            <p id="player-song-artist"></p>
          </div>
          <div class="player-buttons">
            <button id="previous" class="previous" aria-label="Previous">
              <svg width="24" height="19" viewBox="0 0 24 19" fill="none" xmlns="http://www.w3.org/2000/svg">
                <path d="M23.2248 0L7.03964 9.5L23.2248 19L23.2248 0Z" />
                <rect width="4.63633" height="18.5453" transform="matrix(-1 0 0 1 4.63633 0)" />
              </svg>
            </button>
            <button id="play" class="play" aria-label="Play">
              <svg width="17" height="19" viewBox="0 0 17 19" fill="none" xmlns="http://www.w3.org/2000/svg">
                <path d="M0 0L16.1852 9.5L1.88952e-07 19L0 0Z" />
              </svg>
            </button>
            <button id="pause" class="pause" aria-label="Pause">
              <svg width="17" height="19" viewBox="0 0 17 19" fill="none" xmlns="http://www.w3.org/2000/svg">
                <path d="M0 6.54013e-07H4.75V19H0V6.54013e-07Z" />
                <path d="M11.4 0H16.15V19H11.4V0Z" />
              </svg>
            </button>
            <button id="next" class="next" aria-label="Next">
              <svg width="24" height="19" viewBox="0 0 24 19" fill="none" xmlns="http://www.w3.org/2000/svg">
                <path d="M0 0L16.1852 9.5L1.88952e-07 19L0 0Z" />
                <rect x="18.5885" width="4.63633" height="18.5453" />
              </svg>
            </button>
          </div>
        </div>
      </div>
    </div>
    <div class="playlist">
      <div class="playlist-bar">
        <div class="parallel-lines">
          <div></div>
          <div></div>
        </div>
        <h2 class="playlist-title" id="playlist">Playlist</h2>
        <div class="parallel-lines">
          <div></div>
          <div></div>
        </div>
      </div>
      <ul id="playlist-songs">
        <li id="song-0" class="playlist-song">
          <button class="playlist-song-info" >
            <span class="playlist-song-title">Hello World</span>
            <span class="playlist-song-artist">Rafael</span>
            <span class="playlist-song-duration">0:23</span>
          </button>
        </li>

        <li id="song-1" class="playlist-song">
          <button class="playlist-song-info" >
            <span class="playlist-song-title">In the Zone</span>
            <span class="playlist-song-artist">Rafael</span>
            <span class="playlist-song-duration">0:11</span>
          </button>
        </li>

        <li id="song-2" class="playlist-song">
          <button class="playlist-song-info" >
            <span class="playlist-song-title">Camper Cat</span>
            <span class="playlist-song-artist">Rafael</span>
            <span class="playlist-song-duration">0:21</span>
          </button>
        </li>

        <li id="song-3" class="playlist-song">
          <button class="playlist-song-info" >
            <span class="playlist-song-title">Electronic</span>
            <span class="playlist-song-artist">Rafael</span>
            <span class="playlist-song-duration">0:15</span>
          </button>
        </li>

        <li id="song-4" class="playlist-song">
          <button class="playlist-song-info" >
            <span class="playlist-song-title">Sailing Away</span>
            <span class="playlist-song-artist">Rafael</span>
            <span class="playlist-song-duration">0:22</span>
          </button>
        </li>
      </ul>
    </div>
  </div>
  <script src="script.js"></script>
</body>

</html>

css

:root {
    /* colors */
    --primary-color: #dfdfe2;
    --secondary-color: #ffffff;
    --app-background-color: #4d4d62;
    --background-color: #1b1b32;
    --foreground-color: #3b3b4f;
    --highlight-color: #f1be32;

    /* font sizes */
    --root-font-size: 16px;
    font-size: var(--root-font-size);

    /* font-families */
    --font-headline: "Roboto Mono", monospace;
    --font-family: "Lato", sans-serif;
  }

  *,
  *::after,
  *::before {
    box-sizing: border-box;
  }

  body {
    background-color: var(--app-background-color);
    color: var(--primary-color);
    font-family: var(--font-family);
  }

  h1 {
    font-size: 1.125rem;
    line-height: 1.6;
  }

  h2 {
    font-size: var(--root-font-size);
  }

  ul {
    margin: 0;
  }

  .container {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    row-gap: 5px;
  }

  .player,
  .playlist {
    width: 450px;
    background-color: var(--background-color);
    border: 3px solid var(--foreground-color);
  }

  .player {
    height: 260px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    row-gap: 10px;
  }

  .player-bar,
  .playlist-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5px;
    width: 100%;
    height: 30px;
    background-color: var(--foreground-color);
  }

  .parallel-lines {
    display: flex;
    flex-wrap: wrap;
    row-gap: 6px;
    padding: 0 5px;
  }

  .parallel-lines > div {
    height: 2px;
    width: 100%;
    min-width: 75px;
    background-color: var(--highlight-color);
  }

  .fcc-title,
  .playlist-title {
    color: var(--secondary-color);
    margin: 0 10px;
    font-family: var(--font-headline);
  }

  .player-content {
    display: flex;
    background-color: var(--foreground-color);
    width: 430px;
    height: 200px;
    column-gap: 13px;
    align-items: center;
    justify-content: center;
  }

  #player-album-art {
    background-color: var(--secondary-color);
    border: 6px solid var(--background-color);
  }

  #player-album-art img {
    width: 150px;
    display: block;
  }

  .player-display {
    display: flex;
    flex-direction: column;
    row-gap: 20px;
    padding: 14px;
    background-color: var(--background-color);
    height: 153px;
    width: 226px;
  }

  .player-display-song-artist {
    height: 80px;
  }

  .player-buttons svg {
    fill: var(--primary-color);
  }

  .playing > svg {
    fill: var(--highlight-color);
  }

  .player-buttons {
    display: flex;
    justify-content: space-around;
  }

  button {
    background: transparent;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-size: var(--root-font-size);
    outline-color: var(--highlight-color);
    text-align: center;
  }

  .playlist-song {
    outline-color: var(--highlight-color);
  }

  .playlist li:not(:last-child) {
    border-bottom: 1px solid var(--background-color);
  }

  button:focus,
  .playlist-song:focus {
    outline-style: dashed;
    outline-width: 2px;
  }

  /* Playlist */
  .playlist {
    height: auto;
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    row-gap: 10px;
  }

  #playlist-songs {
    width: 430px;
    height: 100%;
    background-color: var(--foreground-color);
    display: flex;
    flex-direction: column;
    row-gap: 8px;
    padding: 8px 9px;
    visibility: visible;
    justify-content: start;
    list-style: none;
  }

  .playlist-song {
    display: flex;
    height: 55px;
    justify-content: space-between;
    align-items: center;
    padding: 5px;
  }

  [aria-current="true"] {
    background-color: var(--background-color);
  }

  [aria-current="true"] p {
    color: var(--highlight-color);
  }

  .playlist-song-info {
    height: 100%;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-around;
    column-gap: 7px;
    padding: 5px 0;
    font-family: var(--font-family);
  }

  #player-song-title,
  #player-song-artist {
    margin: 0;
  }

  #player-song-artist {
    color: var(--highlight-color);
    font-size: 0.75rem;
  }

  #player-song-title {
    font-size: 1.125rem;
  }

  .playlist-song-title {
    font-size: 0.85rem;
    width: 241px;
    text-align: left;
  }

  .playlist-song-artist {
    font-size: 0.725rem;
    width: 80px;
  }

  .playlist-song-duration {
    font-size: 0.725rem;
    margin: auto;
    font-family: var(--font-headline);
    width: 30px;
  }

  .playlist-song-delete {
    padding: 0;
    width: 20px;
    height: 20px;
  }

  .playlist-song-delete,
  .playlist-song-delete {
    fill: var(--foreground-color);
  }

  .playlist-song-delete:hover circle,
  .playlist-song-delete:focus circle {
    fill: #ff0000;
  }

  @media (max-width: 700px) {
    .player,
    .playlist {
      width: 300px;
    }

    .player {
      height: 340px;
    }

    #playlist-songs {
      height: 280px;
      padding: 5px 6px;
      overflow-y: scroll;
      overflow-x: hidden;
      scrollbar-color: var(--background-color) var(--secondary-color);
      scrollbar-width: thin;
    }

    #playlist-songs::-webkit-scrollbar {
      width: 5px;
    }

    #playlist-songs::-webkit-scrollbar-track {
      background: var(--background-color);
    }

    #playlist-songs::-webkit-scrollbar-thumb {
      background: var(--secondary-color);
    }

    h1 {
      font-size: 0.813rem;
    }

    h2 {
      font-size: 0.75rem;
    }

    .player-bar,
    .playlist-bar,
    .player-content,
    #playlist-songs {
      width: 280px;
    }

    .playlist-song {
      justify-content: space-between;
    }

    .playlist-song-title {
      width: 140px;
    }

    .playlist-song-artist {
      width: 40px;
    }

    .playlist-song-duration > button {
      padding: 0;
    }

    .player-content {
      display: inline;
      position: relative;
      justify-items: center;
      height: 100%;
    }

    #player-album-art {
      z-index: -100;
      height: 280px;
      box-shadow: none;
      background: #000;
    }

    #player-album-art img {
      width: 100%;
      opacity: 0.6;
    }

    .player-display-song-artist {
      padding: 0 10px;
    }

    .player-display-song-artist > p {
      white-space: pre-wrap;
    }

    .player-display {
      position: absolute;
      width: 100%;
      z-index: 1000;
      background-color: transparent;
      top: 0;
      height: 280px;
      justify-content: space-between;
      text-align: center;
    }
  }

const playlistSongs = document.getElementById("playlist-songs");
const playButton = document.getElementById("play");
const pauseButton = document.getElementById("pause");
const nextButton = document.getElementById("next");
const previousButton = document.getElementById("previous");
const playingSong = document.getElementById("player-song-title");
const songArtist = document.getElementById("player-song-artist");
const allSongs = [
  {
    id: 0,
    title: "Hello World",
    artist: "Rafael",
    duration: "0:23",
    src: "https://cdn.freecodecamp.org/curriculum/js-music-player/hello-world.mp3",
  },
  {
    id: 1,
    title: "In the Zone",
    artist: "Rafael",
    duration: "0:11",
    src: "https://cdn.freecodecamp.org/curriculum/js-music-player/in-the-zone.mp3",
  },
  {
    id: 2,
    title: "Camper Cat",
    artist: "Rafael",
    duration: "0:21",
    src: "https://cdn.freecodecamp.org/curriculum/js-music-player/camper-cat.mp3",
  },
  {
    id: 3,
    title: "Electronic",
    artist: "Rafael",
    duration: "0:15",
    src: "https://cdn.freecodecamp.org/curriculum/js-music-player/electronic.mp3",
  },
  {
    id: 4,
    title: "Sailing Away",
    artist: "Rafael",
    duration: "0:22",
    src: "https://cdn.freecodecamp.org/curriculum/js-music-player/sailing-away.mp3",
  },
];

const audio = new Audio();

const userData = {
  songs: allSongs,
  currentSong: null,
  songCurrentTime: 0,
}

const playSong = (id, start=true) => {
  const song = userData.songs.find((song) => song.id === id);
  audio.src = song.src;
  audio.title = song.title;
  if (userData.currentSong === null || start) {
    audio.currentTime = 0
  } else {
    audio.currentTime = userData.songCurrentTime;
  }
  userData.currentSong = song;
  playButton.classList.add("playing");
  setPlayerDisplay();
  highlightCurrentSong();
  setPlayButtonAccessibleText();
  audio.play();
}

const pauseSong = () => {
  userData.songCurrentTime = audio.currentTime;
  playButton.classList.remove("playing");
  audio.pause();
}

const getCurrentSongIndex = () => userData.songs.indexOf(userData.currentSong);

const getNextSong = () => userData.songs[getCurrentSongIndex() + 1];

const getPreviousSong = () => userData.songs[getCurrentSongIndex() - 1];

const playPreviousSong = () => {
  if (userData.currentSong === null) return;
  const previousSong = getPreviousSong();
  if (previousSong) {
    playSong(previousSong.id);
  } else {
    playSong(userData.songs[0].id);
  }
};

const playNextSong = () => {
  if (userData.currentSong === null) {
    playSong(userData.songs[0].id);
    return
  }
  const nextSong = getNextSong();
  if (nextSong) {
    playSong(nextSong.id);
  } else {
    userData.currentSong = null;
    userData.songCurrentTime = 0;
    setPlayerDisplay();
    highlightCurrentSong();
    setPlayButtonAccessibleText();
    pauseSong();
  }
}

const setPlayerDisplay = () => {
  const currentTitle = userData.currentSong?.title;
  const currentArtist = userData.currentSong?.artist;

  playingSong.textContent = currentTitle ? currentTitle : "";
  songArtist.textContent = currentArtist ? currentArtist : "";
};

const highlightCurrentSong = () => {
  const previousCurrentSong = document.querySelector('.playlist-song[aria-current="true"]');
  previousCurrentSong?.removeAttribute("aria-current");
  const songToHighlight = document.getElementById(
    `song-${userData.currentSong?.id}`
  );
  
  songToHighlight?.setAttribute("aria-current", "true");
};

const setPlayButtonAccessibleText = () => {
  const song = userData.currentSong;
  playButton.setAttribute("aria-label", userData.currentSong ? `Play ${song.title}` : "Play");
};

playButton.addEventListener("click", () => {
  if (userData.currentSong === null) {
    playSong(userData.songs[0].id);
  } else {
    playSong(userData.currentSong.id, false);
  }
});

const songs = document.querySelectorAll(".playlist-song");

songs.forEach((song) => {
  const id = song.getAttribute("id").slice(5);
  const songBtn = song.querySelector("button");
  songBtn.addEventListener("click", () => {
      playSong(Number(id));
  })
})

pauseButton.addEventListener("click", pauseSong);

nextButton.addEventListener("click", playNextSong);

previousButton.addEventListener("click", playPreviousSong);

--fcc-editable-region--
  
--fcc-editable-region--

--solutions--