im Working with PhoneGap, im building an application with connection mode, and i want to show for users to check their internet when they are offline to use the my app, how can i do this ?
Two ways:
navigator.onLine, see MDN Documentation for details.
The Network Information plugin lets you check if there is a connection available, and if so, what type of connection is in use (but you should not rely on the connection type — there are lots of ways the connection type can mislead you.)
However, you should not rely on these to determine if your app has a connection to your backend. Short of having no connection whatsoever, you should always attempt to route to your host, since having a connection doesn't guarantee that your host is reachable. The host could be down, or the user could be behind a network that doesn't let them out.
As to the user interface, that's entirely up to you. Avoid lots of technical verbage, and keep the message simple but clear.