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Gotchas in Blazor Web Apps for .NET 8 – Learn about key challenges and unexpected behaviors developers might face in Blazor Web Apps with .NET 8. These are not necessarily bugs but important design choices that you need to be aware of!

Presented by Carl Franklin

Timestamps below ⬇️

🔥 Topics Covered:
– New Blazor Web App model in .NET 8
– How interactivity works in .NET 8 and why it’s optional
– Common “gotchas” when handling interactivity per page/component
– Why button clicks may fail silently and how to fix it
– Scoped services and why they may get recreated unexpectedly
– The issue with cascading parameters and how to retain state
– HTTP client problems in WebAssembly pre-rendering
– Community solutions for handling Blazor state management


00:00 - Introduction to Blazor "Gotchas" in .NET 8
01:05 - Blazor Community Contributions
03:00 - Understanding .NET 8 Blazor Web Apps Model
05:30 - Why Interactivity Is Now Optional in Blazor
08:15 - Gotcha #1: Button Click Events Failing Silently
11:00 - Blazor Train & Blazor Puzzle – Community Resources
13:45 - Gotcha #2: EditForms Without Interactivity – State Persistence Issue
17:20 - The Importance of Explicitly Defining Interactivity
20:10 - Gotcha #3: Scoped Services Getting Recreated Unexpectedly
23:30 - Scoped Services & Circuit Lifetime in Blazor Server
26:15 - Gotcha #4: Cascading Parameters Not Retaining State
30:00 - Pre-Rendering in Blazor WebAssembly & HTTP Client Issues
33:40 - How to Properly Register HTTP Clients in Server & Client
36:20 - Possible Workarounds for Blazor State Management Issues
39:00 - Future Fixes & Community Solutions for Blazor Gotchas
41:30 - Conclusion & Final Thoughts