What is device preview?

AFAIK, there are available non-mobile options that are fitted for learning or at least to run your application preview . These are currently under development. Flutter for desktop, check this for samples. Flutter for web, which is now available in Flutter beta channel.2 Oca 2020

Think of Device Preview as a first-order approximation of how your app looks and feels on a mobile device . With Device Mode you don’t actually run your code on a mobile device. You simulate the mobile user experience from your laptop, desktop or tablet.

Every time a file changes, a new ‘Flutter Outline’ event is sent to IntelliJ with structured information about the contents of a file . This information includes classes, methods, fields, as well as information about the Flutter widgets created in the file.3 Nis 2018