📦 Fable 5.27.0 is live!
Featuring cross-backend support for hex conversions, improved file tracking during rebuilds, and a massive set of BCL alignment fixes across JS, TS, Python, and Rust.
Details & release notes: github.com/fable-compiler…
#fsharp
Featuring cross-backend support for hex conversions, improved file tracking during rebuilds, and a massive set of BCL alignment fixes across JS, TS, Python, and Rust.
Details & release notes: github.com/fable-compiler…
#fsharp
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⚡️ Fable 5.25.0 is out!
14 perf improvements for JS/TS:
• Union hash 36 → 5 ns, 0 alloc
• Dictionary lookup 39 → 30 ns, 0 alloc
• Record hash 15-20% faster
• List ops 15-30% faster
Contributors aligned behavior with .NET. Thanks @GoswinR, Leo Conforti, cabboose!
14 perf improvements for JS/TS:
• Union hash 36 → 5 ns, 0 alloc
• Dictionary lookup 39 → 30 ns, 0 alloc
• Record hash 15-20% faster
• List ops 15-30% faster
Contributors aligned behavior with .NET. Thanks @GoswinR, Leo Conforti, cabboose!
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Fable Compiler 🇺🇦 #StandWithUkraine retweeted
🚀 Free speedups for JS/TS in the next Fable release:
- List operations: up to 3x faster
- Map lookups: ~1.7x faster
Zero code changes needed.
#fsharp
- List operations: up to 3x faster
- Map lookups: ~1.7x faster
Zero code changes needed.
#fsharp
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Fable Compiler 🇺🇦 #StandWithUkraine retweeted
@FableCompiler compile time *halved* with just an update to fable itself. Amazing. Thank you! #fsharp @MangelMaxime
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Fable 5.22 is out. Since 5.16:
- Opt-in Temporal dates and times for JS
- Implicit conversion to U2..U9
- Cold builds: project cracking 7.7s to 2.3s 🏎️
- Compilation up to 2.9x faster (server GC + JIT tuning) 🎉
- Faster watch: incremental inline exprs
- Many BEAM and Rust fixes
- Opt-in Temporal dates and times for JS
- Implicit conversion to U2..U9
- Cold builds: project cracking 7.7s to 2.3s 🏎️
- Compilation up to 2.9x faster (server GC + JIT tuning) 🎉
- Faster watch: incremental inline exprs
- Many BEAM and Rust fixes
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Fable Compiler 🇺🇦 #StandWithUkraine retweeted
Introducing Fable.Ripple: fine-grained reactivity for F# and Fable.
A write updates the exact DOM nodes reading the signal. No virtual tree, no diff.
Four focused packages for signals, DOM, forms, and routing.
Try the beta: fable-hub.github.io/Fable.Ripple/
#fsharp
A write updates the exact DOM nodes reading the signal. No virtual tree, no diff.
Four focused packages for signals, DOM, forms, and routing.
Try the beta: fable-hub.github.io/Fable.Ripple/
#fsharp
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Nacara is back, featuring in-browser interactive snippets powered by Fable. You can now expose your own library code live in your docs so readers can experiment with your API immediately.
See the Thoth.Json docs for a live example!
See the Thoth.Json docs for a live example!
Nacara is back! 🔥
A complete ground-up rewrite running natively on .NET. It's now fully pluggable and lets you turn F# code snippets into interactive playgrounds.
👀 See it live on Thoth.Json docs: thoth-org.github.io/Thoth.Json/
🚀 Check out Nacara: mangelmaxime.github.io/Nacara/
#fsharp
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Fable 5.14.0, 5.15.0, and 5.16.0 have been released over the past few days! 🚀
These updates feature:
- Improved support for Python, Rust, and Beam.
- Added support for precompiled libraries in fable-standalone (stay tuned for a surprise coming in the next few days!).
#fsharp
These updates feature:
- Improved support for Python, Rust, and Beam.
- Added support for precompiled libraries in fable-standalone (stay tuned for a surprise coming in the next few days!).
#fsharp
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🚀 Fable 5.7.0 is officially live! 🎉
This release brings massive performance upgrades under the hood for Python:
- DU pattern matching: 6-10x speed up! 🏎️
- Sequences: 1.6x faster!
#fsharp
This release brings massive performance upgrades under the hood for Python:
- DU pattern matching: 6-10x speed up! 🏎️
- Sequences: 1.6x faster!
#fsharp
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Fable 5.5 is out 🎉
This release have a strong focus on fixing bug for JavaScript/TypeScript targets.
It is also trying to make the writing cross-target code easier. Thanks to `Compiler.is*` target detection as an alternative to compiler directives.
#fsharp
This release have a strong focus on fixing bug for JavaScript/TypeScript targets.
It is also trying to make the writing cross-target code easier. Thanks to `Compiler.is*` target detection as an alternative to compiler directives.
#fsharp
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Release note is available at github.com/fable-compiler…
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Fable Compiler 🇺🇦 #StandWithUkraine retweeted
We're building a binding for the #fsharp and @FableCompiler communities to implement the full SDK. Every bit helps! 😉 github.com/FidelityFramew…
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What's better than Fable 5?
Fable 5.1 and 5.2! 🎉 (And yes, I totally forgot to announce 5.1).
Both releases bring plenty of fixes across various targets. Check out the release notes for details:
github.com/fable-compiler…
#fsharp
Fable 5.1 and 5.2! 🎉 (And yes, I totally forgot to announce 5.1).
Both releases bring plenty of fixes across various targets. Check out the release notes for details:
github.com/fable-compiler…
#fsharp
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Fable Compiler 🇺🇦 #StandWithUkraine retweeted
Congratulations, You won @FableCompiler ! Fable 5 the LLM still think Fable 5 is the latest release of a #fsharp to JavaScript compiler:
Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use.
Its capabilities exceed those of any model we’ve ever made generally available.
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Fable Compiler 🇺🇦 #StandWithUkraine retweeted
There is a new test framework joining the F# ecosystem: Scriptorium.
It is designed from the ground up as a cross-target testing framework, seamlessly supporting both F# .NET and Fable compilation targets (JavaScript only at the time of writing)
fable-hub.github.io/Scriptorium/
#fsharp
It is designed from the ground up as a cross-target testing framework, seamlessly supporting both F# .NET and Fable compilation targets (JavaScript only at the time of writing)
fable-hub.github.io/Scriptorium/
#fsharp
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Fable Compiler 🇺🇦 #StandWithUkraine retweeted
Fable 5 has been released 🎉
This is the result of almost 1 year and a half of work from the community and the maintainers.
Huge thank you to everyone involved. ❤️
#fsharp
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Fable 5 has been released 🎉
This is the result of almost 1 year and a half of work from the community and the maintainers.
Huge thank you to everyone involved. ❤️
#fsharp
This is the result of almost 1 year and a half of work from the community and the maintainers.
Huge thank you to everyone involved. ❤️
#fsharp
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Fable Compiler 🇺🇦 #StandWithUkraine retweeted
🚨 BREAKING: 🙄🧐🤨☺️We just pushed the latest version of Cloudflare bindings for #fsharp. We've generated bindings for a fairly significant cross-section of the supported SDK and API surface for management. #dotnet @FableCompiler nuget.org/packages?q=Fid…
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The wait is over! Fable 5 Release Candidate is officially here. 🚀
After a year of hard work from the community, we're bringing you:
✨ .NET 10 & F# 10 support
🐍 A massive Python update (now powered by a Rust core & PyPI!)
🌐 Cleaner JS/TS Pojo bindings
fable.io/blog/2026/2026…
After a year of hard work from the community, we're bringing you:
✨ .NET 10 & F# 10 support
🐍 A massive Python update (now powered by a Rust core & PyPI!)
🌐 Cleaner JS/TS Pojo bindings
fable.io/blog/2026/2026…
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