Issue—Blazor: IJSRuntime.InvokeAsync serialization broken for arrays of objects.

The InvokeAsync accepts only params object[] args, so the array of objects is parsed as a single, top-level entry in args. You have to pass the array of objects as a single object by casting. The following code only passes the single array object.

[JS helper]

window.debugOut = function(content) {
 console.dir(content);
}

[Razor]

await JSRuntime.InvokeAsync<object>("debugOut", new Person[] {
     new Person{FirstName=" Nancy",LastName=” Davolio”},
      new Person{FirstName=" Andrew", LastName=” Fuller”}
});

By casting the array into an object, it retrieves all the values.

await JSRuntime.InvokeAsync< object >("debugOut", (object) new Person[] {
     new Person{FirstName=" Nancy",LastName=” Davolio”},
      new Person{FirstName=" Andrew", LastName=” Fuller”}
});

Refer to the following link for more information. https://github.com/aspnet/AspNetCore/issues/8743