Fable.Compiler 4.0.0-alpha-005

.NET 6.0 This package targets .NET 6.0. The package is compatible with this framework or higher.
This is a prerelease version of Fable.Compiler.
There is a newer prerelease version of this package available.
See the version list below for details. 
dotnet add package Fable.Compiler --version 4.0.0-alpha-005
                    


                    

                
NuGet\Install-Package Fable.Compiler -Version 4.0.0-alpha-005
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Fable.Compiler" Version="4.0.0-alpha-005" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Fable.Compiler" Version="4.0.0-alpha-005" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Fable.Compiler" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Fable.Compiler --version 4.0.0-alpha-005
                    


                    

                
#r "nuget: Fable.Compiler, 4.0.0-alpha-005"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Fable.Compiler@4.0.0-alpha-005
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Fable.Compiler&version=4.0.0-alpha-005&prerelease
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Fable.Compiler&version=4.0.0-alpha-005&prerelease
                    


                            Install as a Cake Tool

Fable: F# |> JS

Nuget Build Join the chat at https://gitter.im/fable-compiler/Fable

Follow us on Twitter!

Fable is an F# to JavaScript compiler powered FSharp Compiler Services, designed to make F# a first-class citizen of the JavaScript ecosystem. Check the website for more information and if you find the project useful, don't forget to give us a star!

Fable actually uses a fork of FCS with a few tweaks. Binaries are in lib/fcs folder. See this PR for more info.

Getting started

Check this page.

Building

Requirements

Use VSCode Dev Container

You can use VSCode Dev Container to get a preconfigured environment both with requirements and VSCode extensions.

  1. You need to have docker installed and running.
  2. Install the Dev Container extension in VSCode
  3. Open the project in VSCode and click on the green button in the bottom left corner.
Use your machine

Make sure the following requirements are installed in your system:

Build

Run ./builsh.sh or ./build.cmd to see the build options.

When using VSCode, you can also run the build tasks from the command palette (Ctrl+Shift+P) by typing Run Task and selecting the task you want to run.

We also configured several debug configurations that you can use from the debug panel (Ctrl+Shift+D). This is useful as you can attach the debugger to the Fable compiler process to check what's going on.

Contributing

Just by using Fable you're already contributing! You can help the community a lot by sharing examples and experiences in your personal (or Fable's) blog and/or by editing the Fable Resources page.

Send bug reports (ideally with minimal code to reproduce the problem) and feature requests to this GitHub repository. To interact with the community you can use the Gitter chat but please note maintainers are not checking the chat regularly.

If you are up to contribute a fix or a feature yourself, you're more than welcome! Please send first an issue or a minimal Work In Progess PR so we can discuss the implementation details in advance.

Product Compatible and additional computed target framework versions.
.NET net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on Fable.Compiler:

Package Downloads
Fable.Plugins.NUnit

Package Description

GitHub repositories

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Version Downloads Last Updated
5.0.0-alpha.19 36 12/8/2025
5.0.0-alpha.18 134 12/4/2025
5.0.0-alpha.17 603 12/3/2025
5.0.0-alpha.16 118 11/27/2025
5.0.0-alpha.15 344 11/19/2025
5.0.0-alpha.14 355 7/25/2025
5.0.0-alpha.13 984 5/4/2025
5.0.0-alpha.12 116 3/14/2025
5.0.0-alpha.11 221 3/3/2025
5.0.0-alpha.10 126 2/16/2025
5.0.0-alpha.9 485 1/28/2025
5.0.0-alpha.8 131 1/27/2025
5.0.0-alpha.7 139 1/23/2025
5.0.0-alpha.6 127 1/23/2025
5.0.0-alpha.5 104 1/9/2025
5.0.0-alpha.4 156 1/3/2025
5.0.0-alpha.3 128 12/18/2024
5.0.0-alpha.2 631 11/26/2024
5.0.0-alpha.1 124 11/24/2024
4.0.0-alpha-019 164 11/25/2025
4.0.0-alpha-018 165 7/14/2025
4.0.0-alpha-017 175 4/26/2025
4.0.0-alpha-016 169 11/19/2024
4.0.0-alpha-015 230 10/28/2024
4.0.0-alpha-014 185 10/2/2024
4.0.0-alpha-013 188 9/19/2024
4.0.0-alpha-012 171 6/17/2024
4.0.0-alpha-011 783 6/13/2024
4.0.0-alpha-010 173 6/10/2024
4.0.0-alpha-009 202 5/24/2024
4.0.0-alpha-008 834 2/27/2024
4.0.0-alpha-007 255 2/20/2024
4.0.0-alpha-006 192 2/13/2024
4.0.0-alpha-005 295 2/12/2024
4.0.0-alpha-004 205 1/30/2024
4.0.0-alpha-003 173 1/30/2024
4.0.0-alpha-002 143 1/25/2024
4.0.0-alpha-001 203 12/14/2023
1.3.18 13,352 9/3/2018
1.3.17 9,092 5/10/2018
1.3.16 2,411 5/5/2018
1.3.15 10,022 4/19/2018
1.3.14 5,220 3/30/2018
1.3.12 2,449 3/22/2018
1.3.11 3,335 3/8/2018
1.3.10 3,936 3/1/2018
1.3.9 2,229 3/1/2018
1.3.8 7,124 1/23/2018
1.3.7 3,298 12/21/2017
1.3.6 2,692 12/14/2017
1.3.5 2,207 12/13/2017
1.3.4 2,721 11/29/2017
1.3.3 3,099 11/27/2017
1.3.2 3,008 11/23/2017
1.3.1 2,127 11/21/2017
1.3.0 2,164 11/15/2017
1.3.0-beta-009 1,384 11/15/2017
1.3.0-beta-008 1,323 11/14/2017
1.3.0-beta-007 1,392 11/10/2017
1.3.0-beta-006 1,407 10/27/2017
1.3.0-beta-003 1,668 10/26/2017
1.3.0-beta-002 1,500 10/19/2017
1.3.0-beta-001 1,602 9/29/2017
1.2.4 6,429 9/27/2017
1.2.3 2,783 9/18/2017
1.2.2 2,028 9/18/2017
1.2.1 3,424 9/10/2017
1.2.0 3,340 9/6/2017
1.2.0-beta-0015 1,758 8/31/2017
1.2.0-beta-0014 1,509 8/30/2017
1.2.0-beta-0012 1,462 8/28/2017
1.2.0-beta-001 1,766 8/23/2017
1.1.23 1,947 9/5/2017
1.1.22 2,106 8/22/2017
1.1.21 1,813 8/22/2017
1.1.20 2,372 8/8/2017
1.1.19 2,120 7/31/2017
1.1.18 1,985 7/27/2017
1.1.17 2,519 7/24/2017
1.1.16 1,915 7/22/2017
1.1.15 1,882 7/22/2017
1.1.14 1,963 7/18/2017
1.1.12 1,918 7/17/2017
1.1.11 2,254 7/13/2017
1.1.10 1,677 7/12/2017
1.1.9 2,050 7/11/2017
1.1.8 1,922 7/8/2017
1.1.7 2,176 7/5/2017
1.1.6 2,032 7/4/2017
1.1.5 1,826 6/28/2017
1.1.4 1,927 6/24/2017
1.1.3 1,976 6/20/2017
1.1.2 2,007 6/20/2017
1.1.1 1,975 6/19/2017
1.1.0 1,973 6/15/2017
1.1.0-rc-002 1,410 6/12/2017
1.1.0-rc-001 1,410 6/10/2017
1.0.14 1,944 6/14/2017
1.0.12 1,844 6/14/2017
1.0.11 1,923 6/13/2017
1.0.10 1,916 6/13/2017
1.0.9 1,848 6/13/2017
1.0.8 2,751 6/2/2017
1.0.7 2,068 5/27/2017
1.0.6 2,416 5/24/2017
1.0.5 1,856 5/24/2017
1.0.4 2,706 5/17/2017
1.0.3 1,833 5/17/2017
1.0.2 1,844 5/17/2017
1.0.1 1,864 5/17/2017
1.0.0-narumi-921 1,305 5/17/2017
1.0.0-narumi-920 1,435 5/16/2017
1.0.0-narumi-918 1,314 5/16/2017
1.0.0-narumi-917 1,506 5/16/2017
1.0.0-narumi-916 1,405 5/15/2017
1.0.0-narumi-915 1,581 5/9/2017
1.0.0-narumi-914 1,995 4/24/2017
1.0.0-narumi-912 1,498 4/23/2017
1.0.0-narumi-911 1,443 4/19/2017
1.0.0-narumi-910 1,392 4/19/2017
1.0.0-narumi-909 1,473 4/14/2017
1.0.0-narumi-908 1,767 4/2/2017
1.0.0-narumi-906 1,595 3/29/2017
1.0.0-narumi-905 1,388 3/27/2017
1.0.0-narumi-904 1,442 3/25/2017
1.0.0-narumi-903 1,497 3/23/2017
1.0.0-narumi-9 1,418 3/17/2017
1.0.0-narumi-8 1,471 3/15/2017
1.0.0-narumi-7 1,365 3/14/2017
1.0.0-narumi-6 1,414 3/14/2017
1.0.0-narumi-5 1,482 3/13/2017
1.0.0-narumi-4 1,327 3/13/2017
1.0.0-narumi-3 1,599 3/10/2017
1.0.0-narumi-2 1,308 3/10/2017
1.0.0-narumi-15 1,638 3/22/2017
1.0.0-narumi-10 1,521 3/20/2017
1.0.0-narumi-1 1,751 3/10/2017

## Changed

- [GH-3742](https://github.com/fable-compiler/Fable/pull/3742) Return diagnostics in compile response (by @nojaf)
- [GH-3746](https://github.com/fable-compiler/Fable/pull/3746) Extract type-checking from compilation (by @nojaf)