Blazor

Blazor is a framework that enables you to build client web applications using C# (instead of JavaScript).
You use Razor and C#, instead of JSX and JavaScript

File Extensions
.razor - blazor app
.cshtml - razor app

Blazor has built-in functionality to handle your form data and validation using something called EditForm.
Razor syntax combines C# with HTML

With React

link - devkimchi.com/2020/06/03/adding-react-components-to-blazor-webassembly-app/
link - devkimchi.com/2020/06/10/adding-react-components-to-blazor-webassembly-app-by-nodejs/

link - github.com/manuelsidler/blazor-office-addin

dotnet.js
main.js