Middle-tier architecture

It's tempting, especially for simple applications, to have the desire to connect your mobile app directly to your data store. This is an incredibly bad idea, which means your data store is vulnerable and exposed to attacks from the outside world (unless you require the user to log in to a VPN). It also means that your mobile app has a lot of code dedicated solely to querying your data store, which makes for a tightly coupled environment. If you ever want to change your database platform or modify the table structures, you will need to update the app, and any app that wasn't updated will stop working. Furthermore, if you want another system to access the data, for example, a reporting solution, you will need to repeat the same queries and logic already implemented in your app in order to ensure consistency.

For these reasons alone, it's a bad idea to directly connect your mobile app to your backend database. However, there's one more good reason: Cordova has no nonlocal...