GeezerVison is showing github.com — docs(windows): extending classes, C# sources, threading by triniwiz · Pull Request #202 · NativeScript/docs
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triniwiz
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Oct 4, 2026
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Updates the Windows docs for NativeScript/windows#21:
- Extending classes and implementing interfaces: rewritten. It covers WinRT and .NET classes,
class syntax and extend(), super, constructor arguments, interfaces, @NativeClass / ES5 output and global.__native(this), and lifetime. The build-time proxy description and the "experimental, prefer composition" warning are removed.
- Native code: C# files in
App_Resources/Windows/src and plugin platforms/windows are compiled into the app and usable by namespace. NuGet namespaces no longer need registerNamespace. Tasks are awaitable; JS functions can be passed for delegates and plain objects for structs; .NET events use add_/remove_.
- Marshalling: background-thread callbacks now run on the UI thread. The "Don't change the UI during layout" crash warning is removed. Static events are assigned on the class.
- Multithreading: Windows callback delivery now matches iOS/Android. A callback runs on the UI thread or worker that created it, whichever thread invokes it. The page notes the deadlock caveat.
- Marshalling: boxed
Object values (for example Tag) read back as JS primitives.
Targets chore/windows, the branch that adds the Windows docs.
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- Extending WinRT and .NET classes: class syntax, extend(), super, constructor
arguments, interfaces, @NativeClass/ES5 output, lifetime; no build step.
- C# sources in App_Resources/Windows and plugin platforms/windows are compiled
into the app and reachable by namespace; NuGet namespaces need no
registration; Tasks are awaitable; JS functions and plain objects for
delegates and structs.
- Background-thread callbacks run on the UI thread; the layout-mutation crash
warning is gone; static events on class constructors.
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