Connectivity Playground

Purpose

The Connectivity Playground demonstrates the Browser Lifecycle Connectivity module inside the Browser Session Playground.

It teaches developers:

• advisory online and offline detection
• reconnect cycle events
• navigator.onLine limitations
• optional Network Information API fields

Route

• /connectivity

Architecture

ConnectivityPage
  -> useConnectivityPlayground()
    -> createConnectivityPlaygroundSession() in lib/browser-lifecycle.ts
      -> @jayoncode/browser-lifecycle
    -> connection:online / connection:offline / connection:reconnect listeners
    -> snapshot reads for connectivity fields

Browser API information is read only inside src/lib/browser-lifecycle.ts. UI components never attach online/offline listeners directly.

Page Sections

Online Status

Shows normalized connectivity state, previous state, last change timestamp, duration since the last transition, and session phase.

Network Information

Documents navigator.onLine, online/offline event support, Network Information API fields when available, and browser-to-session event mapping.

Reconnect Timeline

Streams connection:online, connection:offline, and connection:reconnect events with reconnect count, last offline duration, and time since reconnect.

Offline History

Records connection:offline events only, newest first, capped at 100 entries. Supports search, clear, pause, resume, and copy.

Developer Examples

Copy-ready examples that use createBrowserLifecycle() for polling pause, retry, offline banners, and guarded network actions.

Manual QA

1. Open /connectivity and confirm the status reads Online.
2. Use browser devtools to simulate offline mode.
3. Return online and confirm offline, online, and reconnect events appear in the timeline.

Related Docs

• Playground foundation
• Focus playground

Interactive Playground

Explore this topic live in the Connectivity Playground.