Unreliable detectNetwork

[redux-offline]

Unreliable detectNetwork

[jevakallio]

You can already use haywire or any network detector of your choice by setting the detectNetwork handler.

The Offline Guide section also documents this:

Sometimes, it's more reliable to check network connectivity by actually making sure you can exchange data with a remote server by periodically making a HEAD request, or keeping an open WebSocket connection with a heartbeat.

Furthermore, we only use network detection to tell us when we are definitely offline, not when we are definitely online - the retry policy will handle retries when "online" network turns out to be not-so-online after-all.

I will want to make further improvements to the default detection strategy, but for now this is handled by configurability and docs.

Thanks for submitting the issue 🍺 !