Support for HttpRequestMessage Extensions

As of .NET 7, the BCL does not provide a way to set the fetch API options for a HttpRequestMessage. This feature is provided as part of Blazor, which cannot be integrated into Uno Bootstrapper Applications at this time.

To provide similar functionality, the Uno Bootstrapper provides the Uno.Wasm.HttpRequestMessageExtensions package, which contains the same methods as documented here, under the Uno.WebAssembly.Net.Http namespace.

For instance, these extensions can be used to allow for http-only cookies to be included in cross-domain requests:

request.SetBrowserRequestOption("credentials", "include");

See the official .NET documentation for the full list of available extensions.