When using .net 9 and 11.2.8 - is WASM still supposed to block the UI on async?

[BerndBoruttau]

Hi there, could not find any clear information on whether or not its still supposed to block the UI when running an async call with async/await.

Or do I have to do some further magic then just switching to .net 9 and 11.2.8?

[maxkatz6]

No, it's not supposed to block UI.

[maxkatz6]

Or do I have to do some further magic then just switching to .net 9 and 11.2.8?

You can enable WASM multithreading, which is optional and works in .NET 9 with Avalonia.
But that's not the reason for blocking UI.

[maxkatz6]

No, it's not supposed to block UI.

To clarify, you still might see console warnings about blocked UI, since running .NET runtime over browser APIs can't be perfect in single-threaded mode. Yet it should not visibly block UI on any async task awaiting as you mentioning.

[BerndBoruttau]

Thanks for clarification.

When starting to create an example project it suddenly started working and now also works in my real app. Maybe some weird browser caching stuff going on and the midnight reboot helped :-)