This book, Seven Mobile Apps in Seven Weeks by Tony Hillerson, teaches the reader how to make responsive mobile apps on the native platforms of Mobile Web, iOS, Android, and Windows; as well as cross platform using RubyMotion, Xamarin, and React Native.
I discovered it listening to an episode of Developer Tea, and although I have only worked partway through the Mobile Web project, it has taught me a tremendous amount about JavaScript.
It is unfortunately not free ($26), but I decided to take the risk and I absolutely believe it was worth it.