Packages and platforms
The table distinguishes host-neutral Fable JavaScript from packages that bind a specific runtime. “API only” means portable plans and service contracts may compile there, but the package does not provide a live implementation for that runtime.
| Package | .NET | Fable JavaScript: Node | Fable JavaScript: browser | Notes |
|---|---|---|---|---|
Axial |
Yes | Yes | Yes | Core workflows, runtime, layers, concurrency, streams, schedules, and App. |
Axial.Layers |
Yes | Yes | Yes | Reusable provisioning: build an environment with flow capabilities, then provide it. |
Axial.PlatformService |
Yes | Yes | Yes | Clock, logging, randomness, GUID, and environment-variable services; live behavior follows the host. |
Axial.Console |
Yes | Yes | Yes | Console service; JavaScript behavior is limited to facilities supplied by the host console. |
Axial.FileSystem |
Yes | API only | API only | The live filesystem implementation is .NET-only. Supply a JavaScript implementation explicitly if needed. |
Axial.HttpClient |
Yes | API only | API only | Request plans are portable; the live HttpClient implementation is .NET-only. |
Axial.Process |
Yes | API only | API only | Process plans are portable; live child-process execution is .NET-only. |
Axial.Hosting |
Yes | No | No | Standalone .NET and Microsoft Generic Host integration. |
Axial.Hosting.Node |
No | Yes | No | Node signals, arguments, exit code, and process.env. |
Axial.Hosting.Browser |
No | No | Yes | Browser ownership and AbortSignal integration. |
Axial.Hosting.AspNetCore (experimental) |
Yes | No | No | ASP.NET Core schema-driven endpoints; depends on Reified packages. |
Axial.Hosting.GenHttp (experimental) |
Yes | No | No | GenHTTP schema-driven endpoints; depends on Reified packages. |
Axial.Telemetry |
Yes | No | No | .NET System.Diagnostics and OpenTelemetry integration. |
Axial.Telemetry.JavaScript |
No | Yes | Yes | Fable JavaScript span export; configure an exporter appropriate to the host. |
Axial.Guardrails |
— | — | — | Build-time FSharp.Analyzers.SDK analyzer (net8.0). Runs during compilation of any project, including Fable ones, to flag direct ambient effects; not a runtime dependency. |
Each guide installs the package it teaches at first use: Console, FileSystem and Files, WebSocket, Process, HttpClient, Hosting (Node and Browser for Fable), Telemetry, and Elmish flows.
JavaScript-only hosting packages intentionally fail outside their named runtime. The browser adapter does not treat page visibility or unload as dependable application shutdown.
Dependencies
NuGet installs the transitive dependencies below; reference only the packages you use directly. Every package also depends on FSharp.Core.
Axial defines the service contracts, such as IClock, but does not depend on Axial.PlatformService. That package adds the live clock, logging, randomness, GUID, and environment-variable implementations.
| Package | Axial packages it brings in | Other dependencies |
|---|---|---|
Axial |
None | Fable.Core |
Axial.Layers |
Axial |
None |
Axial.PlatformService |
Axial, Axial.Layers |
None |
Axial.Console |
Axial |
None |
Axial.FileSystem |
Axial |
None |
Axial.HttpClient |
Axial, Axial.PlatformService |
None |
Axial.Process |
Axial, Axial.PlatformService, Axial.Console, Axial.FileSystem |
None |
Axial.Hosting |
Axial, Axial.Layers, Axial.PlatformService, Axial.HttpClient |
Microsoft.Extensions.Configuration.Abstractions, DependencyInjection.Abstractions, Hosting.Abstractions, Http, Logging.Abstractions |
Axial.Hosting.Node |
Axial, Axial.PlatformService |
Fable.Core |
Axial.Hosting.Browser |
Axial |
Fable.Core |
Axial.Telemetry |
Axial |
System.Diagnostics.DiagnosticSource |
Axial.Telemetry.JavaScript |
Axial |
Fable.Core |
Axial.Hosting.AspNetCore (experimental) |
Axial |
Reified.Schema.Http, Reified.Schema, Reified.Data |
Axial.Hosting.GenHttp (experimental) |
Axial |
GenHTTP.Api, GenHTTP.Modules.IO, Reified.Schema.Http, Reified.Schema, Reified.Data |
Installing Axial.Process also installs Axial.Console, Axial.FileSystem, and Axial.PlatformService.
Only the two HTTP host adapters, Axial.Hosting.AspNetCore (experimental) and Axial.Hosting.GenHttp (experimental), depend on Reified. The core
Axial package and the operational packages do not.