F# Functional App Development, using declarative dynamic UI
Fabulous aims to provide all the tools to let you create your own mobile and desktop apps using only F# and the Model-View-Update architecture (shorten to MVU), with a great F# DSL for building dynamic UIs.
The combination of F# and MVU makes for a great development experience.
Note that Fabulous itself does not provide UI controls, so you'll need to combine it with another framework like Xamarin.Forms.
Fabulous for Xamarin.Forms combines both frameworks with a tailored DSL to let you take advantage of everything Xamarin.Forms has to offer while keeping all the benefits of Fabulous.
With Fabulous for Xamarin.Forms, you will be able to write complete applications in F# like this:
type Model = { Text: string }
type Msg = ButtonClicked
let init () = { Text = "Hello Fabulous!" }
let update msg model =
match msg with
| ButtonClicked -> { model with Text = "Thanks for using Fabulous!" }
let view model dispatch =
View.ContentPage(
View.StackLayout(
children = [
View.Image(source = Image.fromPath "fabulous.png")
View.Label(text = model.Text)
View.Button(text = "Click me", command = fun () -> dispatch ButtonClicked)
]
)
)
Learn more about Fabulous for Xamarin.Forms
Fabulous is not tied to Xamarin.Forms.
If you want to use your favorite UI framework instead, it's possible.
To help you with that, Fabulous comes with its own code generator, called Fabulous.CodeGen, to automate the creation of a DSL specific to your UI framework.
Learn more about Fabulous.CodeGen
Last modified 06 April 2022