Overview

Miso.Subscription.OnLine provides onLineSub, a subscription that tracks the browser's navigator.onLine connectivity status. It registers online and offline event listeners on window and fires an action with True when the connection is restored and False when it is lost.

Quick start

import Miso
import Miso.Subscription.OnLine

data Action = OnLineChanged Bool

subs :: [Sub Action]
subs = [ onLineSub OnLineChanged ]

update :: Action -> Effect p props Model Action
update (OnLineChanged isOnLine)
  | isOnLine  = io_ (consoleLog "Back online")
  | otherwise = io_ (consoleLog "Offline")

To read the current status imperatively without subscribing, use isOnLine from Miso.Navigator.

See also

• Miso.Navigator — isOnLine for one-shot reads
• Miso.Subscription — re-export hub
• Miso.Subscription.Util — createSub used internally