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The widget layer of flutter is Skia which is written in C++ and Flutter apps compile to ARM binary (native) code. Someone else asked about whether a Flutter app can be ported to Linux; why not compile both the logic and the UI directly to WebAssembly?

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There's Flutter desktop: https://github.com/google/flutter-desktop-embedding

And web: https://medium.com/flutter-io/hummingbird-building-flutter-f...

Holy smokes! That's awesome! (I was aware of the desktop embedding, but also on the web... that's really cool)

WebAssembly compilation is a little orthogonal to getting the framework and rendering system up and running. We do not have to wait for WebAssembly to make progress on the UI side of things. Having said that, when WebAssembly is available for us to try, we certainly will.

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