fabulous-dev

Fabulous

F#2019–2025

fabulous-dev / Fabulous

Fabulous

Declarative UI framework for cross-platform mobile & desktop apps, using MVU and functional programming in F#

Mobile & Desktop Libraries & SDKs

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9Distinct people

9Mentions

0Explicit recommenders

1.3KGitHub stars

REPOSITORY AT A GLANCE

What to know before exploring

What it is

Declarative UI framework for cross-platform mobile & desktop apps, using MVU and functional programming in F#

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

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Also in these discussions

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This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year9 dated mentions

Observed mentions: 2019-10-31 00:22:10 UTC to 2025-03-02 17:58:48 UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges

UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
Period	Start (UTC)	End (exclusive, UTC)	Mentions	Submissions	Comments
2019	2019-01-01 00:00:00 UTC	2020-01-01 00:00:00 UTC	3	1	2
2020	2020-01-01 00:00:00 UTC	2021-01-01 00:00:00 UTC	2	1	1
2021	2021-01-01 00:00:00 UTC	2022-01-01 00:00:00 UTC	2	0	2
2022	2022-01-01 00:00:00 UTC	2023-01-01 00:00:00 UTC	1	0	1
2023	2023-01-01 00:00:00 UTC	2024-01-01 00:00:00 UTC	0	0	0
2024	2024-01-01 00:00:00 UTC	2025-01-01 00:00:00 UTC	0	0	0
2025	2025-01-01 00:00:00 UTC	2026-01-01 00:00:00 UTC	1	0	1

What Hacker News says

9 sources

neonsunset·Mar 2, 2025

Yes! https://funcui.avaloniaui.net https://github.com/fabulous-dev/Fabulous (I'm sure there are more, these two are those which I could recall from the top off my head)

In Ask HN: What less-popular systems programming language are you using?

ReleaseCandidat·Jan 17, 2022

Well yes, they're nice, but how would they help with Zig? https://github.com/fsprojects/Fabulous

In Failing to Learn Zig via Advent of Code

d3nj4l·Nov 2, 2021

Your first idea sounds great and very close o some ideas I've been thinking a lot about. If you ever get somewhere with it, please post a Show HN! On your second, I immediately thought of Fabulous, a package that uses the Elm Architecture to build Xamarin cross platform apps in F#. [1] Have you seen it before? 1: https://github.com/fsprojects/Fabulous

In Ask HN: What you up to? (Who doesn't want to be hired?)

dharmaturtle·Aug 20, 2021

To add to the other comment, how about Fabulous? https://github.com/fsprojects/Fabulous

In Performance Improvements in .NET 6

SZJX·Apr 8, 2020Submission

Ask HN: Framework to build cross-platform apps for both mobile and desktop?

I'm building an app which needs to leverage functionalities native to the target platforms (e.g. menu bar on MacOS, widget/notifications on mobile), therefore a purely web-based frontend wouldn't suffice. Since this is a solo project for now, it would be much more realistic for me to use a framework which allows me to reuse as much code as possible across different target platforms. I found some Ask HN posts on this, but many of them are 3 or 4 years old. Since this landscape is apparently evolving very rapidly, I thought it would make sense to ask it again. What would you recommend based on your experience? Some of my more specific questions based on a preliminary research (feel free to skip them): - Seems that the current frameworks are mainly divided into two camps: Xamarin.Forms vs. JS-based solutions. I am curious about how bug-free

Read the rest

Xamarin.Forms is. There is even a project[1] that facilitates using F# with Xamarin.Forms, which sounds great since I want to write as much functional code as possible. But I heard some concerns over Xamarin.Forms' development speed and reliability on different platforms. - There are several JS-based solutions, e.g. Ionic, Quasar, Framework7. But it's really hard to tell the difference between them at first glance. Apparently they all offer desktop support by eventually leveraging Electron, but how different are they in terms of development experience, features and support, especially for a solo developer? - Flutter seems to have generated a lot of attention, but it doesn't seem to fully support Windows/Linux yet, though that's on the roadmap. Should I skip it because of this, or can I count on the support (at least for Windows) being available soon? - The above question sort of applies to React Native as well, which does have Windows support by MS but doesn't seem to have reliable Mac support yet (Maybe I'm wrong). Thanks! [1] https://github.com/fsprojects/Fabulous

3 points · Open discussion

fceccon·Apr 7, 2020

If you want to use F# to build GUIs, you should definitely check out Fabolous [1]. It uses Xamarin.Forms to render the widgets, and you get to write the application logic using the Elm architecture. [1] https://github.com/fsprojects/Fabulous

In Mobius – .NET runtime running on .NET Core

1ark·Nov 13, 2019Submission

Fabulous, F# functional app development using declarative dynamic UI

2 points · Open discussion

pjmlp·Nov 10, 2019

You are looking at XAML, which underlines WPF, Silverlight, UWP/WinUI as the layout description language. You can also do it in pure .NET code without XML, hence why I specifically mentioned code first. So to pick on your example, var btn = new Button { Name = "Button", Content = "Hello, world!", HorizontalAlignment = HorizontalAlignment.Left, }; btn.Click += (s, e) => { // handle click event }; Slightly more verbose, but one can still wrap those calls, or just pick Fabulous, https://github.com/fsprojects/Fabulous WinUI is the latest tech, just UWP as usual, still the future of Windows UI, now re-architected not to depend on a specific Windows 10 release, going back all the way to Falls Creator.

In Rust 2020: GUI and Community

sasmithjr·Oct 31, 2019

If you use F#, Fabulous[1] for mobile apps and Fable+Elmish[2][3] for web exist. I use Giraffe's[4] view engine for server-side HTML templating. And it looks like AvaloniaUI is going to have a similar style UI in FuncUI[5], but I'm not sure how active that is. I'm not sure about any C#-focused efforts. 1: https://github.com/fsprojects/Fabulous 2: https://github.com/fable-compiler/Fable (transpiles F# to JS) 3: https://github.com/elmish/elmish 4: https://github.com/giraffe-fsharp/Giraffe 5: https://github.com/JaggerJo/Avalonia.FuncUI

In When XML Beats JSON: UI Layouts