Provide guidance about moving large amount of data from JavaScript into Blazor.

[rxelizondo]

Describe the bug

When attempting to move "large" amounts of data from JavaScript into Blazor I get different errors at different times:

wasm-0074c056:474 Uncaught (in promise) RangeError: Maximum call stack size exceeded

blazor.webassembly.js:1 Uncaught (in promise) Error: System.Reflection.TargetException: Non-static method requires a target.

blazor.webassembly.js:1 Uncaught (in promise) Error: System.BadImageFormatException: Method has zero rva

To Reproduce

Using version of ASP.NET Core 3.0.0-preview4-19216-03

JavaScript side:

function GetLongString() {
    return "a".repeat(6000000);
}

Blazor Side:

((IJSInProcessRuntime)JSRuntime).Invoke<string>("GetLongString", null);

Making the call from Blazor into JavaScript generates the errors in the browser console. Note that what I am really trying to do is to move pictures from JavaScript into Blazor by first serializign the pictures into base64 and them moving them to Blazor as suggested here: https://github.com/aspnet/Blazor/issues/527#issuecomment-401840036

Thanks.

[mkArtakMSFT]

Thanks for contacting us, @rxelizondo.
We're focusing our efforts mainly on to the Blazor Server Side model for the upcoming 3.0 release. We'll look into this after that.

[mkArtakMSFT]

Let's document what the patterns are for doing this.