Advanced Functionality in Blazor WebAssembly

Understanding the browser compatibility analyzer for Blazor WebAssembly

With .NET 6 and later, Microsoft has unified the .NET library for all workloads. However, although, in theory, this means that a Blazor WebAssembly app has full access to all .NET APIs, in practice, it runs inside a browser sandbox, so there are limitations. If we call an unsupported API, this will throw a PlatformNotSupportedException.

To be forewarned about unsupported APIs, we can add a platform compatibility analyzer that will warn us when our code uses APIs unsupported by browsers. Blazor WebAssembly App and Razor Class Library project templates automatically enable browser compatibility checks.

To manually activate browser compatibility checks, for example, in a Class Library or classlib project, add an entry to the project file, as shown in the following markup: