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.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.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. |
JavaScript-only hosting packages intentionally fail outside their named runtime. The browser adapter does not treat page visibility or unload as dependable application shutdown.