WaveformPlaylist

Playlist and chapter navigation for WaveformPlayer. Zero-config, lightweight, and perfect for podcasts, courses, and music playlists.

Features

• 🎵 Multiple track support - Create playlists with seamless track switching
• 📍 Chapter navigation - Add clickable timestamps to any track
• 🎨 Smart markers - Chapters automatically appear on waveform for single tracks
• 🖼️ Artwork support - Display album/episode artwork in track list
• ▶️ Play state indicators - Visual feedback for currently playing track
• ⌨️ Keyboard shortcuts - Navigate with N/P and number keys
• 📱 Responsive - Works perfectly on all devices
• 🎯 Two layouts - List view or minimal button layout
• 🪶 Lightweight - ~4KB gzipped (JS + CSS)

Installation

NPM

npm install @arraypress/waveform-player @arraypress/waveform-playlist

CDN

<!-- WaveformPlayer (required) -->
<link rel="stylesheet" href="https://unpkg.com/@arraypress/waveform-player@latest/dist/waveform-player.css">
<script src="https://unpkg.com/@arraypress/waveform-player@latest/dist/waveform-player.js"></script>

<!-- WaveformPlaylist -->
<link rel="stylesheet" href="https://unpkg.com/@arraypress/waveform-playlist@latest/dist/waveform-playlist.css">
<script src="https://unpkg.com/@arraypress/waveform-playlist@latest/dist/waveform-playlist.js"></script>

Quick Start

Podcast with Chapters

<div data-waveform-playlist>
  <div data-track 
       data-url="episode.mp3" 
       data-title="Episode 42: AI Revolution"
       data-subtitle="with Dr. Sarah Chen"
       data-artwork="episode-cover.jpg">
    <div data-chapter data-time="0:00">Introduction</div>
    <div data-chapter data-time="5:30">Main Topic</div>
    <div data-chapter data-time="45:00">Q&A Session</div>
  </div>
</div>

Music Playlist with Artwork

<div data-waveform-playlist 
     data-continuous="true"
     data-show-play-state="true">
  <div data-track 
       data-url="song1.mp3" 
       data-title="Summer Vibes"
       data-subtitle="Beach Sounds"
       data-artwork="cover1.jpg"
       data-duration="3:45"></div>
  <div data-track 
       data-url="song2.mp3" 
       data-title="Night Drive"
       data-subtitle="Synthwave Mix"
       data-artwork="cover2.jpg"
       data-duration="4:12"></div>
</div>

Course Modules with Chapters

<div data-waveform-playlist 
     data-continuous="true"
     data-expand-chapters="true">
  <div data-track 
       data-url="lesson1.mp3" 
       data-title="Module 1: Introduction"
       data-subtitle="Getting Started">
    <div data-chapter data-time="0:00">Welcome</div>
    <div data-chapter data-time="10:00">Setup</div>
  </div>
  <div data-track 
       data-url="lesson2.mp3" 
       data-title="Module 2: Core Concepts">
    <div data-chapter data-time="0:00">Theory</div>
    <div data-chapter data-time="15:00">Practice</div>
  </div>
</div>

Minimal Button Layout

<div data-waveform-playlist data-layout="minimal">
  <div data-track data-url="beat1.mp3" data-title="Trap Beat"></div>
  <div data-track data-url="beat2.mp3" data-title="Lo-Fi"></div>
  <div data-track data-url="beat3.mp3" data-title="Boom Bap"></div>
</div>

Configuration

Container Attributes

All WaveformPlayer options can be set on the container and will be inherited:

<div data-waveform-playlist
     data-waveform-style="mirror"
     data-height="80"
     data-bar-width="2"
     data-progress-color="rgba(168, 85, 247, 0.9)"
     data-show-playback-speed="true">
  <!-- tracks here -->
</div>

Playlist Options

Attribute	Default	Description
data-layout	"list"	Layout style: "list" or "minimal"
data-continuous	false	Auto-play next track when one ends
data-expand-chapters	true	Show chapters under tracks in multi-track lists
data-show-duration	true	Display track durations
data-show-play-state	true	Show play/pause overlay on artwork
data-show-chapter-markers	null	Show chapters as waveform markers (smart default)
data-chapter-marker-color	rgba(168, 85, 247, 0.8)	Default color for chapter markers

Track Attributes

Attribute	Description
data-url	Audio file URL (required)
data-title	Track title
data-subtitle	Artist or description
data-artwork	Album artwork URL
data-album	Album name (for Media Session API)
data-duration	Display duration (e.g., "3:45")
data-markers	JSON array of waveform markers (separate from chapters)

Chapter Attributes

Attribute	Description
data-time	Timestamp (e.g., "1:30" or "0:00")
data-color	Optional marker color for this chapter

JavaScript API

// Create instance programmatically
const playlist = new WaveformPlaylist('#my-playlist', {
    continuous: true,
    expandChapters: true,
    showPlayState: true
});

// Navigate tracks
playlist.nextTrack();
playlist.previousTrack();
playlist.selectTrack(2);

// Seek to chapter
playlist.seekToChapter(trackIndex, timeInSeconds);

// Get current state
const player = playlist.getPlayer();
const trackIndex = playlist.getCurrentTrackIndex();
const tracks = playlist.getTracks();

// Destroy
playlist.destroy();

Keyboard Shortcuts

• N - Next track
• P - Previous track
• 1-9 - Jump to track by number
• Space - Play/Pause (when focused)
• ←/→ - Seek (via WaveformPlayer)
• ↑/↓ - Volume (via WaveformPlayer)

Smart Defaults

The library intelligently adapts based on your content:

• Single track with chapters: Shows chapters as both navigation list AND waveform markers
• Multiple tracks: Shows track list, chapters expand under active track, no waveform markers
• Minimal layout: Shows compact button switcher

Styling

The library provides minimal, semantic HTML that's easy to style:

/* Custom styling example */
.waveform-playlist {
  background: #1a1a1a;
  border-radius: 12px;
  padding: 1rem;
}

.wp-item {
  padding: 1rem;
  border-radius: 8px;
}

.wp-item:hover {
  background: rgba(255, 255, 255, 0.05);
}

.wp-item.wp-active {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.wp-artwork {
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

Use Cases

📻 Podcasts

• Episode chapters with visual timeline
• Clickable timestamps in show notes
• Sponsor segment navigation

🎓 Online Courses

• Module/lesson organization
• Chapter breakdowns within lessons
• Visual progress through content

🎵 Music & Audio

• Album track listings with artwork
• Beat/sample showcases
• DJ mix tracklists

📖 Audiobooks

• Chapter navigation
• Section bookmarks
• Visual timeline of book structure

Browser Support

• Chrome/Edge 90+
• Firefox 88+
• Safari 14+
• Mobile browsers

License

MIT © ArrayPress

Related

• WaveformPlayer - The core audio player with waveform visualization