How to Build an Ionic 4 App with Offline Mode

CRANK

When one of your project requirements is to have an offline mode where users can still use the app and information even without a connection, there are different ways to go about this. In this article we will build an Ionic 4 app with offline mode that caches API data so it can be used as a fallback later. Also, we create an offline manager which stores requests made during that time so we can later send out the calls one by one when we are online again. While there are caching plugins (that don't work well with v4 yet)