[sebazzz]

At work we’re incrementally rewriting a legacy Javascript Electron application in Blazor / C# WASM. The biggest issue we’ve run into as far as WASM interop goes is that it is not really possible to pass objects between WASM and JS. It requires some form of serialization to JSON or a different blittable format. Since the data we work with in the application is quite large, this has caused some headaches.

[RagnarD]

But why are you? Unless it requires interfacing with a JS library or some JS operation on the DOM, the goal of a Blazor app is to write in C#, not JS. What's your JS code doing that it requires passing C# objects to it? (That said, Blazor supports JS Interop, see https://dev.to/rasheedmozaffar/intro-to-js-interop-in-blazor...)