A simple Cordova plugin for getting the status of the ringer mode. Currently only works for Android and has only been tested in an Android emulator.
cordova plugin add https://github.com/Rasim-/cordova-plugin-ringermode.git
This is not an actively maintained repository, please feel free to fork this project and create your own version. The plugin was created as response to the following question on StackOverflow: https://stackoverflow.com/questions/38452187/get-device-silent-status