Blazor IPC for Chromely

HostInterop.cs

using Microsoft.JSInterop;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace TempusBlazor.Client.Interop
{
  public static class HostInterop
  {
    private static Dictionary<string, Action<String>> _handlers = new Dictionary<string, Action<string>>();

    public static bool IsHosted => JsInterop.Call<bool>("isHosted");
    public static void SendCommand(string type, string content = null) => JsInterop.Invoke("sendHostCommand", type, content ?? string.Empty);
    public static T SendRequest<T>(string type, string content, Action<string> callback) => JsInterop.Call<T>("sendHostRequest", type, content, callback);

    [JSInvokable]
    public static void HandleHostCommand(string type, string body)
    {
      if(!_handlers.TryGetValue(type, out var handler))
        throw new Exception($"No handler was configured to receive a '{type}' command");
      handler(body);
    }

    public static void HandleMessage(string header, Action<String> handler) => _handlers.Add(header, handler);
  }
}