I'm not aware of any planned/possible way to do copy exactly as you would an HTML page with HTML tags, but there's a big project to make selection and copying much simpler and more powerful (design doc [1], in progress PR[2]).
With that PR it should be easy to just add one SelectionArea to the root of your app in order to make everything selectable, like it would be on a web page. You don't need SelectableText widgets. There's an example of this in the PR [3]. No built-in support for multimedia or rich text copying yet though.
Text input fields should already do copy/paste pretty much the same as native.
[1] http://flutter.dev/go/global-selection [2] https://github.com/flutter/flutter/pull/95226 [3] https://github.com/flutter/flutter/pull/95226/files#diff-a90...
Great initiative. Wondering why can't Google make this a priority and make it fast instead of focus on desktop and other device support.
Do they know that a ton of devs are not jumping in because of this one simple issue and sticking to other frameworks?
Do they support copy / paste on the web app without using a special widget?