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You left out probably the most widely used one, Google’s j2cl compiler (java->js), which is used quite extensively in many google products for shared business logic. It is the spiritual inheritor of GWT.

Ah, wasn't aware of it.

ChherpJ seems more like a browser extension. TeaVM sounds like it at least from the runtime perspective (not so much from app model.. neither applet or Blazor alike? ... But indeed it is older). I think TeaVM could be the foundation to run applets on a WebAssembly and not browser extension.

Yes, TeaVM predates Blazor and still has the edge on most fronts:

https://frequal.com/java/TeaVmVsBlazorWasm1-0.html

Comparison Chart: https://frequal.com/java/TeaVmVsBlazorChart.html

That chart is funny:)