Implementation: How to ensure the music player works in cars and continues p...

Documentation for Sessions

⚙️ Implementation: How to ensure the music player works in cars and continues p...

Date: 2026-02-12
Time: 04:21:12 UTC
Session: gspace1-108.10
Agent: angular
Confidence: 95%
Status: ✅ Documented

📋 Decision Context

Question:

How to ensure the music player works in cars and continues playing when the user switches apps?

Task: GoGrab Pulse - PWA, Media Session API, and background playback

🎯 Decision Made

Chosen:

PWA with Media Session API, Service Worker, and manifest.json for installable standalone mode

Options Considered:

  1. Native app wrapper (Capacitor/Cordova)
  2. PWA with Media Session API
  3. Web Audio API with background worker
  4. Basic HTML5 audio only

💭 Reasoning

Background playback on mobile requires multiple layers: (1) Media Session API: Sets navigator.mediaSession metadata (title, artist, album, artwork) so car dashboards, lock screens, and notification centers show the correct track info. Action handlers for play, pause, previoustrack, nexttrack, seekbackward, seekforward enable hardware/car controls. (2) PWA manifest.json with display:standalone makes the app installable. When installed as a PWA, it runs in its own process and is more likely to maintain audio playback when the user switches to another app. (3) Service Worker (sw.js) with network-first strategy caches the player for offline use. (4) iOS-specific: Background playback is most reliable when installed as PWA via Share > Add to Home Screen. Safari tabs may stop audio when backgrounded, but standalone PWAs get better treatment. The install banner detects iOS Safari and shows 'Tap Share then Add to Home Screen' instructions. (5) The manifest uses background_color:#0a0a1a and theme_color:#0a0a1a for the dark theme. (6) Cache versioning (CACHE_NAME in sw.js) must be bumped on significant updates.

📁 Files Involved

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