Fable

Web

Freedom report

One barScore 5.4

Fable is ranked #11 of 28 in code transpilers on Freedom251. It runs on Web.

Compared on code transpilers

What it does: Fable is a compiler that lets developers use F# to build applications for multiple target languages.
Stable targets: JavaScript and TypeScript are listed as stable targets.
Other targets: Dart and Python are listed as beta, Rust as alpha, and PHP and Beam (Erlang) as experimental.
JavaScript output: The homepage says Fable produces readable JavaScript compatible with ES2015 standards and tooling such as Webpack.
JavaScript interop: Fable supports importing JavaScript modules and using NPM packages from F# code.
Project setup: The getting started guide installs Fable as a .NET tool and adds Fable.Core to an F# project.
Build workflow: The CLI supports release, watch, and clean commands, plus options such as output directory and source maps.
Editor support: The homepage names Visual Studio Code and JetBrains Rider as editor choices.
Libraries: The documentation lists Fable.Core, Fable.Browser.Dom, Fable.Elmish.React, and Thoth.Json as libraries available for Fable projects, and cautions that not all NuGet libraries work with Fable.
Python requirement: Fable Python targets Python 3.12 or higher; Python 3.10 and 3.11 are deprecated.
Beam requirement: The Beam setup guide requires Erlang/OTP 25 or higher and rebar3.
Online access: The homepage links to an online Fable REPL.

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