diff --git a/src/Components/Server/src/Builder/ComponentEndpointConventionBuilder.cs b/src/Components/Server/src/Builder/ComponentEndpointConventionBuilder.cs
index 021272c7d672..a154feb4e64a 100644
--- a/src/Components/Server/src/Builder/ComponentEndpointConventionBuilder.cs
+++ b/src/Components/Server/src/Builder/ComponentEndpointConventionBuilder.cs
@@ -10,11 +10,13 @@ namespace Microsoft.AspNetCore.Builder
     /// </summary>
     public sealed class ComponentEndpointConventionBuilder : IHubEndpointConventionBuilder
     {
-        private readonly IEndpointConventionBuilder _endpointConventionBuilder;
+        private readonly IEndpointConventionBuilder _hubEndpoint;
+        private readonly IEndpointConventionBuilder _disconnectEndpoint;
 
-        internal ComponentEndpointConventionBuilder(IEndpointConventionBuilder endpointConventionBuilder)
+        internal ComponentEndpointConventionBuilder(IEndpointConventionBuilder hubEndpoint, IEndpointConventionBuilder disconnectEndpoint)
         {
-            _endpointConventionBuilder = endpointConventionBuilder;
+            _hubEndpoint = hubEndpoint;
+            _disconnectEndpoint = disconnectEndpoint;
         }
 
         /// <summary>
@@ -23,7 +25,8 @@ internal ComponentEndpointConventionBuilder(IEndpointConventionBuilder endpointC
         /// <param name="convention">The convention to add to the builder.</param>
         public void Add(Action<EndpointBuilder> convention)
         {
-            _endpointConventionBuilder.Add(convention);
+            _hubEndpoint.Add(convention);
+            _disconnectEndpoint.Add(convention);
         }
     }
 }
diff --git a/src/Components/Server/src/Builder/ComponentEndpointRouteBuilderExtensions.cs b/src/Components/Server/src/Builder/ComponentEndpointRouteBuilderExtensions.cs
index 8af4ad37e8f0..d747a69b60c3 100644
--- a/src/Components/Server/src/Builder/ComponentEndpointRouteBuilderExtensions.cs
+++ b/src/Components/Server/src/Builder/ComponentEndpointRouteBuilderExtensions.cs
@@ -292,7 +292,17 @@ public static ComponentEndpointConventionBuilder MapBlazorHub(
                 throw new ArgumentNullException(nameof(configureOptions));
             }
 
-            return new ComponentEndpointConventionBuilder(endpoints.MapHub<ComponentHub>(path, configureOptions)).AddComponent(componentType, selector);
+            var hubEndpoint = endpoints.MapHub<ComponentHub>(path, configureOptions);
+
+            var disconnectEndpoint = endpoints.Map(
+                (path.EndsWith("/") ? path : path + "/") + "disconnect/",
+                endpoints.CreateApplicationBuilder().UseMiddleware<CircuitDisconnectMiddleware>().Build())
+                .WithDisplayName("Blazor disconnect");
+
+            return new ComponentEndpointConventionBuilder(
+                hubEndpoint,
+                disconnectEndpoint)
+                    .AddComponent(componentType, selector);
         }
     }
 }
diff --git a/src/Components/Server/src/CircuitDisconnectMiddleware.cs b/src/Components/Server/src/CircuitDisconnectMiddleware.cs
new file mode 100644
index 000000000000..ecacf511d714
--- /dev/null
+++ b/src/Components/Server/src/CircuitDisconnectMiddleware.cs
@@ -0,0 +1,103 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Components.Server.Circuits;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Logging;
+
+namespace Microsoft.AspNetCore.Components.Server
+{
+    // We use a middlware so that we can use DI.
+    internal class CircuitDisconnectMiddleware
+    {
+        private const string CircuitIdKey = "circuitId";
+
+        public CircuitDisconnectMiddleware(
+            ILogger<CircuitDisconnectMiddleware> logger,
+            CircuitRegistry registry,
+            CircuitIdFactory circuitIdFactory,
+            RequestDelegate next)
+        {
+            Logger = logger;
+            Registry = registry;
+            CircuitIdFactory = circuitIdFactory;
+            Next = next;
+        }
+
+        public ILogger<CircuitDisconnectMiddleware> Logger { get; }
+        public CircuitRegistry Registry { get; }
+        public CircuitIdFactory CircuitIdFactory { get; }
+        public RequestDelegate Next { get; }
+
+        public async Task Invoke(HttpContext context)
+        {
+            if (!HttpMethods.IsPost(context.Request.Method))
+            {
+                context.Response.StatusCode = StatusCodes.Status405MethodNotAllowed;
+                return;
+            }
+
+            var (hasCircuitId, circuitId) = await TryGetCircuitIdAsync(context);
+            if (!hasCircuitId)
+            {
+                context.Response.StatusCode = StatusCodes.Status400BadRequest;
+                return;
+            }
+
+            await TerminateCircuitGracefully(circuitId);
+
+            context.Response.StatusCode = StatusCodes.Status200OK;
+        }
+
+        private async Task<(bool, string)> TryGetCircuitIdAsync(HttpContext context)
+        {
+            try
+            {
+                if (!context.Request.HasFormContentType)
+                {
+                    return (false, null);
+                }
+
+                var form = await context.Request.ReadFormAsync();
+                if (!form.TryGetValue(CircuitIdKey, out var circuitId) || !CircuitIdFactory.ValidateCircuitId(circuitId))
+                {
+                    return (false, null);
+                }
+
+                return (true, circuitId);
+            }
+            catch
+            {
+                return (false, null);
+            }
+        }
+
+        private async Task TerminateCircuitGracefully(string circuitId)
+        {
+            try
+            {
+                await Registry.Terminate(circuitId);
+                Log.CircuitTerminatedGracefully(Logger, circuitId);
+            }
+            catch (Exception e)
+            {
+                Log.UnhandledExceptionInCircuit(Logger, circuitId, e);
+            }
+        }
+
+        private class Log
+        {
+            private static readonly Action<ILogger, string, Exception> _circuitTerminatedGracefully =
+                LoggerMessage.Define<string>(LogLevel.Debug, new EventId(1, "CircuitTerminatedGracefully"), "Circuit '{CircuitId}' terminated gracefully");
+
+            private static readonly Action<ILogger, string, Exception> _unhandledExceptionInCircuit =
+                LoggerMessage.Define<string>(LogLevel.Warning, new EventId(2, "UnhandledExceptionInCircuit"), "Unhandled exception in circuit {CircuitId} while terminating gracefully.");
+
+            public static void CircuitTerminatedGracefully(ILogger logger, string circuitId) => _circuitTerminatedGracefully(logger, circuitId, null);
+
+            public static void UnhandledExceptionInCircuit(ILogger logger, string circuitId, Exception exception) => _unhandledExceptionInCircuit(logger, circuitId, exception);
+        }
+    }
+}
diff --git a/src/Components/Server/src/Circuits/CircuitRegistry.cs b/src/Components/Server/src/Circuits/CircuitRegistry.cs
index 9fe25c5b6867..a5c970c4aff1 100644
--- a/src/Components/Server/src/Circuits/CircuitRegistry.cs
+++ b/src/Components/Server/src/Circuits/CircuitRegistry.cs
@@ -81,15 +81,6 @@ public void Register(CircuitHost circuitHost)
             }
         }
 
-        public void PermanentDisconnect(CircuitHost circuitHost)
-        {
-            if (ConnectedCircuits.TryRemove(circuitHost.CircuitId, out _))
-            {
-                Log.CircuitDisconnectedPermanently(_logger, circuitHost.CircuitId);
-                circuitHost.Client.SetDisconnected();
-            }
-        }
-
         public virtual Task DisconnectAsync(CircuitHost circuitHost, string connectionId)
         {
             Log.CircuitDisconnectStarted(_logger, circuitHost.CircuitId, connectionId);
@@ -297,6 +288,29 @@ private void DisposeTokenSource(DisconnectedCircuitEntry entry)
             }
         }
 
+        public ValueTask Terminate(string circuitId)
+        {
+            CircuitHost circuitHost;
+            DisconnectedCircuitEntry entry = default;
+            lock (CircuitRegistryLock)
+            {
+                if (ConnectedCircuits.TryGetValue(circuitId, out circuitHost) || DisconnectedCircuits.TryGetValue(circuitId, out entry))
+                {
+                    circuitHost ??= entry.CircuitHost;
+                    DisconnectedCircuits.Remove(circuitHost.CircuitId);
+                    ConnectedCircuits.TryRemove(circuitHost.CircuitId, out _);
+                    Log.CircuitDisconnectedPermanently(_logger, circuitHost.CircuitId);
+                    circuitHost.Client.SetDisconnected();
+                }
+                else
+                {
+                    return default;
+                }
+            }
+
+            return circuitHost?.DisposeAsync() ?? default;
+        }
+
         private readonly struct DisconnectedCircuitEntry
         {
             public DisconnectedCircuitEntry(CircuitHost circuitHost, CancellationTokenSource tokenSource)
diff --git a/src/Components/Server/src/ComponentHub.cs b/src/Components/Server/src/ComponentHub.cs
index b559e590c3c5..f83fb5e21004 100644
--- a/src/Components/Server/src/ComponentHub.cs
+++ b/src/Components/Server/src/ComponentHub.cs
@@ -68,34 +68,7 @@ public override Task OnDisconnectedAsync(Exception exception)
                 return Task.CompletedTask;
             }
 
-            if (exception != null)
-            {
-                return _circuitRegistry.DisconnectAsync(circuitHost, Context.ConnectionId);
-            }
-            else
-            {
-                // The client will gracefully disconnect when using websockets by correctly closing the TCP connection.
-                // This happens when the user closes a tab, navigates away from the page or reloads the page.
-                // In these situations we know the user is done with the circuit, so we can get rid of it at that point.
-                // This is important to be able to more efficiently manage resources, specially memory.
-                return TerminateCircuitGracefully(circuitHost);
-            }
-        }
-
-        private async Task TerminateCircuitGracefully(CircuitHost circuitHost)
-        {
-            try
-            {
-                Log.CircuitTerminatedGracefully(_logger, circuitHost.CircuitId);
-                _circuitRegistry.PermanentDisconnect(circuitHost);
-                await circuitHost.DisposeAsync();
-            }
-            catch (Exception e)
-            {
-                Log.UnhandledExceptionInCircuit(_logger, circuitHost.CircuitId, e);
-            }
-
-            await _circuitRegistry.DisconnectAsync(circuitHost, Context.ConnectionId);
+            return _circuitRegistry.DisconnectAsync(circuitHost, Context.ConnectionId);
         }
 
         /// <summary>
diff --git a/src/Components/Server/test/CircuitDisconnectMiddlewareTest.cs b/src/Components/Server/test/CircuitDisconnectMiddlewareTest.cs
new file mode 100644
index 000000000000..627c51b5760f
--- /dev/null
+++ b/src/Components/Server/test/CircuitDisconnectMiddlewareTest.cs
@@ -0,0 +1,244 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System.Collections.Generic;
+using System.IO;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Components.Server.Circuits;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Logging.Abstractions;
+using Microsoft.Extensions.Options;
+using Xunit;
+
+namespace Microsoft.AspNetCore.Components.Server
+{
+    public class CircuitDisconnectMiddlewareTest
+    {
+        [Theory]
+        [InlineData("GET")]
+        [InlineData("PUT")]
+        [InlineData("DELETE")]
+        [InlineData("HEAD")]
+        public async Task DisconnectMiddleware_OnlyAccepts_PostRequests(string httpMethod)
+        {
+            // Arrange
+            var circuitIdFactory = TestCircuitIdFactory.CreateTestFactory();
+            var registry = new CircuitRegistry(
+                Options.Create(new CircuitOptions()),
+                NullLogger<CircuitRegistry>.Instance,
+                circuitIdFactory);
+
+            var middleware = new CircuitDisconnectMiddleware(
+                NullLogger<CircuitDisconnectMiddleware>.Instance,
+                registry,
+                circuitIdFactory,
+                (ctx) => Task.CompletedTask);
+
+            var context = new DefaultHttpContext();
+            context.Request.Method = httpMethod;
+
+            // Act
+            await middleware.Invoke(context);
+
+            // Assert
+            Assert.Equal(StatusCodes.Status405MethodNotAllowed, context.Response.StatusCode);
+        }
+
+        [Theory]
+        [InlineData(null)]
+        [InlineData("application/json")]
+        public async Task Returns400BadRequest_ForInvalidContentTypes(string contentType)
+        {
+            // Arrange
+            var circuitIdFactory = TestCircuitIdFactory.CreateTestFactory();
+            var registry = new CircuitRegistry(
+                Options.Create(new CircuitOptions()),
+                NullLogger<CircuitRegistry>.Instance,
+                circuitIdFactory);
+
+            var middleware = new CircuitDisconnectMiddleware(
+                NullLogger<CircuitDisconnectMiddleware>.Instance,
+                registry,
+                circuitIdFactory,
+                (ctx) => Task.CompletedTask);
+
+            var context = new DefaultHttpContext();
+            context.Request.Method = HttpMethods.Post;
+            context.Request.ContentType = contentType;
+
+            // Act
+            await middleware.Invoke(context);
+
+            // Assert
+            Assert.Equal(StatusCodes.Status400BadRequest, context.Response.StatusCode);
+        }
+
+        [Fact]
+        public async Task Returns400BadRequest_IfNoCircuitIdOnForm()
+        {
+            // Arrange
+            var circuitIdFactory = TestCircuitIdFactory.CreateTestFactory();
+            var registry = new CircuitRegistry(
+                Options.Create(new CircuitOptions()),
+                NullLogger<CircuitRegistry>.Instance,
+                circuitIdFactory);
+
+            var middleware = new CircuitDisconnectMiddleware(
+                NullLogger<CircuitDisconnectMiddleware>.Instance,
+                registry,
+                circuitIdFactory,
+                (ctx) => Task.CompletedTask);
+
+            var context = new DefaultHttpContext();
+            context.Request.Method = HttpMethods.Post;
+            context.Request.ContentType = "application/x-www-form-urlencoded";
+
+            // Act
+            await middleware.Invoke(context);
+
+            // Assert
+            Assert.Equal(StatusCodes.Status400BadRequest, context.Response.StatusCode);
+        }
+
+        [Fact]
+        public async Task Returns400BadRequest_InvalidCircuitId()
+        {
+            // Arrange
+            var circuitIdFactory = TestCircuitIdFactory.CreateTestFactory();
+            var registry = new CircuitRegistry(
+                Options.Create(new CircuitOptions()),
+                NullLogger<CircuitRegistry>.Instance,
+                circuitIdFactory);
+
+            var middleware = new CircuitDisconnectMiddleware(
+                NullLogger<CircuitDisconnectMiddleware>.Instance,
+                registry,
+                circuitIdFactory,
+                (ctx) => Task.CompletedTask);
+
+            using var memory = new MemoryStream();
+            await new FormUrlEncodedContent(new Dictionary<string, string> { ["circuitId"] = "1234" }).CopyToAsync(memory);
+            memory.Seek(0, SeekOrigin.Begin);
+
+            var context = new DefaultHttpContext();
+            context.Request.Method = HttpMethods.Post;
+            context.Request.ContentType = "application/x-www-form-urlencoded";
+            context.Request.Body = memory;
+
+            // Act
+            await middleware.Invoke(context);
+
+            // Assert
+            Assert.Equal(StatusCodes.Status400BadRequest, context.Response.StatusCode);
+        }
+
+        [Fact]
+        public async Task Returns200OK_NonExistingCircuit()
+        {
+            // Arrange
+            var circuitIdFactory = TestCircuitIdFactory.CreateTestFactory();
+            var id = circuitIdFactory.CreateCircuitId();
+            var registry = new CircuitRegistry(
+                Options.Create(new CircuitOptions()),
+                NullLogger<CircuitRegistry>.Instance,
+                circuitIdFactory);
+
+            var middleware = new CircuitDisconnectMiddleware(
+                NullLogger<CircuitDisconnectMiddleware>.Instance,
+                registry,
+                circuitIdFactory,
+                (ctx) => Task.CompletedTask);
+
+            using var memory = new MemoryStream();
+            await new FormUrlEncodedContent(new Dictionary<string, string> { ["circuitId"] = id }).CopyToAsync(memory);
+            memory.Seek(0, SeekOrigin.Begin);
+
+            var context = new DefaultHttpContext();
+            context.Request.Method = HttpMethods.Post;
+            context.Request.ContentType = "application/x-www-form-urlencoded";
+            context.Request.Body = memory;
+
+            // Act
+            await middleware.Invoke(context);
+
+            // Assert
+            Assert.Equal(StatusCodes.Status200OK, context.Response.StatusCode);
+        }
+
+        [Fact]
+        public async Task GracefullyTerminates_ConnectedCircuit()
+        {
+            // Arrange
+            var circuitIdFactory = TestCircuitIdFactory.CreateTestFactory();
+            var id = circuitIdFactory.CreateCircuitId();
+            var testCircuitHost = TestCircuitHost.Create(id);
+
+            var registry = new CircuitRegistry(
+                Options.Create(new CircuitOptions()),
+                NullLogger<CircuitRegistry>.Instance,
+                circuitIdFactory);
+
+            registry.Register(testCircuitHost);
+
+            var middleware = new CircuitDisconnectMiddleware(
+                NullLogger<CircuitDisconnectMiddleware>.Instance,
+                registry,
+                circuitIdFactory,
+                (ctx) => Task.CompletedTask);
+
+            using var memory = new MemoryStream();
+            await new FormUrlEncodedContent(new Dictionary<string, string> { ["circuitId"] = id }).CopyToAsync(memory);
+            memory.Seek(0, SeekOrigin.Begin);
+
+            var context = new DefaultHttpContext();
+            context.Request.Method = HttpMethods.Post;
+            context.Request.ContentType = "application/x-www-form-urlencoded";
+            context.Request.Body = memory;
+
+            // Act
+            await middleware.Invoke(context);
+
+            // Assert
+            Assert.Equal(StatusCodes.Status200OK, context.Response.StatusCode);
+        }
+
+        [Fact]
+        public async Task GracefullyTerminates_DisconnectedCircuit()
+        {
+            // Arrange
+            var circuitIdFactory = TestCircuitIdFactory.CreateTestFactory();
+            var id = circuitIdFactory.CreateCircuitId();
+            var circuitHost = TestCircuitHost.Create(id);
+
+            var registry = new CircuitRegistry(
+                Options.Create(new CircuitOptions()),
+                NullLogger<CircuitRegistry>.Instance,
+                circuitIdFactory);
+
+            registry.Register(circuitHost);
+            await registry.DisconnectAsync(circuitHost, "1234");
+
+            var middleware = new CircuitDisconnectMiddleware(
+                NullLogger<CircuitDisconnectMiddleware>.Instance,
+                registry,
+                circuitIdFactory,
+                (ctx) => Task.CompletedTask);
+
+            using var memory = new MemoryStream();
+            await new FormUrlEncodedContent(new Dictionary<string, string> { ["circuitId"] = id }).CopyToAsync(memory);
+            memory.Seek(0, SeekOrigin.Begin);
+
+            var context = new DefaultHttpContext();
+            context.Request.Method = HttpMethods.Post;
+            context.Request.ContentType = "application/x-www-form-urlencoded";
+            context.Request.Body = memory;
+
+            // Act
+            await middleware.Invoke(context);
+
+            // Assert
+            Assert.Equal(StatusCodes.Status200OK, context.Response.StatusCode);
+        }
+    }
+}
diff --git a/src/Components/Server/test/ComponentEndpointRouteBuilderExtensionsTest.cs b/src/Components/Server/test/ComponentEndpointRouteBuilderExtensionsTest.cs
index cba13e8581c8..852ad62f0de0 100644
--- a/src/Components/Server/test/ComponentEndpointRouteBuilderExtensionsTest.cs
+++ b/src/Components/Server/test/ComponentEndpointRouteBuilderExtensionsTest.cs
@@ -4,6 +4,7 @@
 using System.Diagnostics;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Moq;
@@ -63,6 +64,7 @@ private IApplicationBuilder CreateAppBuilder()
             services.AddRouting();
             services.AddSignalR();
             services.AddServerSideBlazor();
+            services.AddSingleton<IConfiguration>(new ConfigurationBuilder().Build());
 
             var serviceProvder = services.BuildServiceProvider();
 
diff --git a/src/Components/Web.JS/dist/Release/blazor.server.js b/src/Components/Web.JS/dist/Release/blazor.server.js
index a79de53cec3e..fc7be4706bab 100644
--- a/src/Components/Web.JS/dist/Release/blazor.server.js
+++ b/src/Components/Web.JS/dist/Release/blazor.server.js
@@ -1,11 +1,11 @@
-!function(e){var t={};function n(r){if(t[r])return t[r].exports;var o=t[r]={i:r,l:!1,exports:{}};return e[r].call(o.exports,o,o.exports,n),o.l=!0,o.exports}n.m=e,n.c=t,n.d=function(e,t,r){n.o(e,t)||Object.defineProperty(e,t,{enumerable:!0,get:r})},n.r=function(e){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},n.t=function(e,t){if(1&t&&(e=n(e)),8&t)return e;if(4&t&&"object"==typeof e&&e&&e.__esModule)return e;var r=Object.create(null);if(n.r(r),Object.defineProperty(r,"default",{enumerable:!0,value:e}),2&t&&"string"!=typeof e)for(var o in e)n.d(r,o,function(t){return e[t]}.bind(null,o));return r},n.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return n.d(t,"a",t),t},n.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},n.p="",n(n.s=49)}([function(e,t,n){"use strict";var r;n.d(t,"a",function(){return r}),function(e){e[e.Trace=0]="Trace",e[e.Debug=1]="Debug",e[e.Information=2]="Information",e[e.Warning=3]="Warning",e[e.Error=4]="Error",e[e.Critical=5]="Critical",e[e.None=6]="None"}(r||(r={}))},function(e,t,n){"use strict";n.d(t,"a",function(){return a}),n.d(t,"c",function(){return c}),n.d(t,"f",function(){return u}),n.d(t,"g",function(){return l}),n.d(t,"h",function(){return f}),n.d(t,"e",function(){return h}),n.d(t,"d",function(){return p}),n.d(t,"b",function(){return d});var r=n(0),o=n(6),i=function(e,t,n,r){return new(n||(n=Promise))(function(o,i){function s(e){try{c(r.next(e))}catch(e){i(e)}}function a(e){try{c(r.throw(e))}catch(e){i(e)}}function c(e){e.done?o(e.value):new n(function(t){t(e.value)}).then(s,a)}c((r=r.apply(e,t||[])).next())})},s=function(e,t){var n,r,o,i,s={label:0,sent:function(){if(1&o[0])throw o[1];return o[1]},trys:[],ops:[]};return i={next:a(0),throw:a(1),return:a(2)},"function"==typeof Symbol&&(i[Symbol.iterator]=function(){return this}),i;function a(i){return function(a){return function(i){if(n)throw new TypeError("Generator is already executing.");for(;s;)try{if(n=1,r&&(o=2&i[0]?r.return:i[0]?r.throw||((o=r.return)&&o.call(r),0):r.next)&&!(o=o.call(r,i[1])).done)return o;switch(r=0,o&&(i=[2&i[0],o.value]),i[0]){case 0:case 1:o=i;break;case 4:return s.label++,{value:i[1],done:!1};case 5:s.label++,r=i[1],i=[0];continue;case 7:i=s.ops.pop(),s.trys.pop();continue;default:if(!(o=(o=s.trys).length>0&&o[o.length-1])&&(6===i[0]||2===i[0])){s=0;continue}if(3===i[0]&&(!o||i[1]>o[0]&&i[1]<o[3])){s.label=i[1];break}if(6===i[0]&&s.label<o[1]){s.label=o[1],o=i;break}if(o&&s.label<o[2]){s.label=o[2],s.ops.push(i);break}o[2]&&s.ops.pop(),s.trys.pop();continue}i=t.call(e,s)}catch(e){i=[6,e],r=0}finally{n=o=0}if(5&i[0])throw i[1];return{value:i[0]?i[1]:void 0,done:!0}}([i,a])}}},a=function(){function e(){}return e.isRequired=function(e,t){if(null==e)throw new Error("The '"+t+"' argument is required.")},e.isIn=function(e,t,n){if(!(e in t))throw new Error("Unknown "+n+" value: "+e+".")},e}(),c=function(){function e(){}return Object.defineProperty(e,"isBrowser",{get:function(){return"object"==typeof window},enumerable:!0,configurable:!0}),Object.defineProperty(e,"isWebWorker",{get:function(){return"object"==typeof self&&"importScripts"in self},enumerable:!0,configurable:!0}),Object.defineProperty(e,"isNode",{get:function(){return!this.isBrowser&&!this.isWebWorker},enumerable:!0,configurable:!0}),e}();function u(e,t){var n="";return l(e)?(n="Binary data of length "+e.byteLength,t&&(n+=". 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Done reconnecting."),clearTimeout(this.reconnectDelayHandle),this.reconnectDelayHandle=void 0,this.completeClose(),Promise.resolve()):(this.cleanupTimeout(),this.cleanupPingTimer(),this.stopDuringStartError=e||new Error("The connection was stopped before the hub handshake could complete."),this.connection.stop(e)))},e.prototype.stream=function(e){for(var t=this,n=[],r=1;r<arguments.length;r++)n[r-1]=arguments[r];var i,s=this.replaceStreamingParams(n),a=s[0],c=s[1],u=this.createStreamInvocation(e,n,c),l=new y;return l.cancelCallback=function(){var e=t.createCancelInvocation(u.invocationId);return delete t.callbacks[u.invocationId],i.then(function(){return t.sendWithProtocol(e)})},this.callbacks[u.invocationId]=function(e,t){t?l.error(t):e&&(e.type===o.Completion?e.error?l.error(new Error(e.error)):l.complete():l.next(e.item))},i=this.sendWithProtocol(u).catch(function(e){l.error(e),delete t.callbacks[u.invocationId]}),this.launchStreams(a,i),l},e.prototype.sendMessage=function(e){return this.resetKeepAliveInterval(),this.connection.send(e)},e.prototype.sendWithProtocol=function(e){return this.sendMessage(this.protocol.writeMessage(e))},e.prototype.send=function(e){for(var t=[],n=1;n<arguments.length;n++)t[n-1]=arguments[n];var r=this.replaceStreamingParams(t),o=r[0],i=r[1],s=this.sendWithProtocol(this.createInvocation(e,t,!0,i));return this.launchStreams(o,s),s},e.prototype.invoke=function(e){for(var t=this,n=[],r=1;r<arguments.length;r++)n[r-1]=arguments[r];var i=this.replaceStreamingParams(n),s=i[0],a=i[1],c=this.createInvocation(e,n,!1,a);return new Promise(function(e,n){t.callbacks[c.invocationId]=function(t,r){r?n(r):t&&(t.type===o.Completion?t.error?n(new Error(t.error)):e(t.result):n(new Error("Unexpected message type: "+t.type)))};var r=t.sendWithProtocol(c).catch(function(e){n(e),delete t.callbacks[c.invocationId]});t.launchStreams(s,r)})},e.prototype.on=function(e,t){e&&t&&(e=e.toLowerCase(),this.methods[e]||(this.methods[e]=[]),-1===this.methods[e].indexOf(t)&&this.methods[e].push(t))},e.prototype.off=function(e,t){if(e){e=e.toLowerCase();var n=this.methods[e];if(n)if(t){var r=n.indexOf(t);-1!==r&&(n.splice(r,1),0===n.length&&delete this.methods[e])}else delete this.methods[e]}},e.prototype.onclose=function(e){e&&this.closedCallbacks.push(e)},e.prototype.onreconnecting=function(e){e&&this.reconnectingCallbacks.push(e)},e.prototype.onreconnected=function(e){e&&this.reconnectedCallbacks.push(e)},e.prototype.processIncomingData=function(e){if(this.cleanupTimeout(),this.receivedHandshakeResponse||(e=this.processHandshakeResponse(e),this.receivedHandshakeResponse=!0),e)for(var t=0,n=this.protocol.parseMessages(e,this.logger);t<n.length;t++){var r=n[t];switch(r.type){case o.Invocation:this.invokeClientMethod(r);break;case o.StreamItem:case o.Completion:var i=this.callbacks[r.invocationId];i&&(r.type===o.Completion&&delete this.callbacks[r.invocationId],i(r));break;case o.Ping:break;case o.Close:this.logger.log(c.a.Information,"Close message received from server."),this.stopPromise=this.stopInternal(r.error?new Error("Server returned an error on close: "+r.error):void 0);break;default:this.logger.log(c.a.Warning,"Invalid message type: "+r.type+".")}}this.resetTimeoutPeriod()},e.prototype.processHandshakeResponse=function(e){var t,n,r;try{r=(t=this.handshakeProtocol.parseHandshakeResponse(e))[0],n=t[1]}catch(e){var o="Error parsing handshake response: "+e;this.logger.log(c.a.Error,o);var i=new Error(o);throw this.handshakeRejecter(i),i}if(n.error){o="Server returned handshake error: "+n.error;this.logger.log(c.a.Error,o);i=new Error(o);throw this.handshakeRejecter(i),i}return this.logger.log(c.a.Debug,"Server handshake complete."),this.handshakeResolver(),r},e.prototype.resetKeepAliveInterval=function(){var e=this;this.cleanupPingTimer(),this.pingServerHandle=setTimeout(function(){return v(e,void 0,void 0,function(){return b(this,function(e){switch(e.label){case 0:if(this.connectionState!==d.Connected)return[3,4];e.label=1;case 1:return e.trys.push([1,3,,4]),[4,this.sendMessage(this.cachedPingMessage)];case 2:return e.sent(),[3,4];case 3:return e.sent(),this.cleanupPingTimer(),[3,4];case 4:return[2]}})})},this.keepAliveIntervalInMilliseconds)},e.prototype.resetTimeoutPeriod=function(){var e=this;this.connection.features&&this.connection.features.inherentKeepAlive||(this.timeoutHandle=setTimeout(function(){return e.serverTimeout()},this.serverTimeoutInMilliseconds))},e.prototype.serverTimeout=function(){this.connection.stop(new Error("Server timeout elapsed without receiving a message from the server."))},e.prototype.invokeClientMethod=function(e){var t=this,n=this.methods[e.target.toLowerCase()];if(n){try{n.forEach(function(n){return n.apply(t,e.arguments)})}catch(t){this.logger.log(c.a.Error,"A callback for the method "+e.target.toLowerCase()+" threw error '"+t+"'.")}if(e.invocationId){var r="Server requested a response, which is not supported in this version of the client.";this.logger.log(c.a.Error,r),this.stopPromise=this.stopInternal(new Error(r))}}else this.logger.log(c.a.Warning,"No client method with the name '"+e.target+"' found.")},e.prototype.connectionClosed=function(e){this.logger.log(c.a.Debug,"HubConnection.connectionClosed("+e+") called while in state "+this.connectionState+"."),this.stopDuringStartError=this.stopDuringStartError||e||new Error("The underlying connection was closed before the hub handshake could complete."),this.handshakeResolver&&this.handshakeResolver(),this.cancelCallbacksWithError(e||new Error("Invocation canceled due to the underlying connection being 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a.trys.push([3,5,,6]),r=e+"&_="+Date.now(),this.logger.log(c.a.Trace,"(LongPolling transport) polling: "+r+"."),[4,this.httpClient.get(r,t)];case 4:return 204===(o=a.sent()).statusCode?(this.logger.log(c.a.Information,"(LongPolling transport) Poll terminated by server."),this.running=!1):200!==o.statusCode?(this.logger.log(c.a.Error,"(LongPolling transport) Unexpected response code: "+o.statusCode+"."),this.closeError=new i.b(o.statusText||"",o.statusCode),this.running=!1):o.content?(this.logger.log(c.a.Trace,"(LongPolling transport) data received. 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t,n,r,o,i,s;return j(this,function(a){switch(a.label){case 0:t=this.baseUrl,this.accessTokenFactory=this.options.accessTokenFactory,a.label=1;case 1:return a.trys.push([1,12,,13]),this.options.skipNegotiation?this.options.transport!==E.WebSockets?[3,3]:(this.transport=this.constructTransport(E.WebSockets),[4,this.startTransport(t,e)]):[3,5];case 2:return a.sent(),[3,4];case 3:throw new Error("Negotiation can only be skipped when using the WebSocket transport directly.");case 4:return[3,11];case 5:n=null,r=0,o=function(){var e;return j(this,function(o){switch(o.label){case 0:return[4,i.getNegotiationResponse(t)];case 1:if(n=o.sent(),"Disconnecting"===i.connectionState||"Disconnected"===i.connectionState)throw new Error("The connection was stopped during negotiation.");if(n.error)throw new Error(n.error);if(n.ProtocolVersion)throw new Error("Detected a connection attempt to an ASP.NET SignalR Server. 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"+i.join(" ")))]:[2,Promise.reject(new Error("None of the transports supported by the client are supported by the server."))]}})})},e.prototype.constructTransport=function(e){switch(e){case E.WebSockets:if(!this.options.WebSocket)throw new Error("'WebSocket' is not supported in your environment.");return new A(this.httpClient,this.accessTokenFactory,this.logger,this.options.logMessageContent||!1,this.options.WebSocket);case E.ServerSentEvents:if(!this.options.EventSource)throw new Error("'EventSource' is not supported in your environment.");return new O(this.httpClient,this.accessTokenFactory,this.logger,this.options.logMessageContent||!1,this.options.EventSource);case E.LongPolling:return new x(this.httpClient,this.accessTokenFactory,this.logger,this.options.logMessageContent||!1);default:throw new Error("Unknown transport: "+e+".")}},e.prototype.startTransport=function(e,t){var n=this;return this.transport.onreceive=this.onreceive,this.transport.onclose=function(e){return n.stopConnection(e)},this.transport.connect(e,t)},e.prototype.resolveTransportOrError=function(e,t,n){var r=E[e.transport];if(null==r)return this.logger.log(c.a.Debug,"Skipping transport '"+e.transport+"' because it is not supported by this client."),new Error("Skipping transport '"+e.transport+"' because it is not supported by this client.");if(!function(e,t){return!e||0!=(t&e)}(t,r))return this.logger.log(c.a.Debug,"Skipping transport '"+E[r]+"' because it was disabled by the client."),new Error("'"+E[r]+"' is disabled by the client.");if(!(e.transferFormats.map(function(e){return S[e]}).indexOf(n)>=0))return this.logger.log(c.a.Debug,"Skipping transport '"+E[r]+"' because it does not support the requested transfer format '"+S[n]+"'."),new Error("'"+E[r]+"' does not support "+S[n]+".");if(r===E.WebSockets&&!this.options.WebSocket||r===E.ServerSentEvents&&!this.options.EventSource)return this.logger.log(c.a.Debug,"Skipping transport '"+E[r]+"' because it is not supported in your 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n.apply(t,e.arguments)})}catch(t){this.logger.log(c.a.Error,"A callback for the method "+e.target.toLowerCase()+" threw error '"+t+"'.")}if(e.invocationId){var r="Server requested a response, which is not supported in this version of the client.";this.logger.log(c.a.Error,r),this.stopPromise=this.stopInternal(new Error(r))}}else this.logger.log(c.a.Warning,"No client method with the name '"+e.target+"' found.")},e.prototype.connectionClosed=function(e){this.logger.log(c.a.Debug,"HubConnection.connectionClosed("+e+") called while in state "+this.connectionState+"."),this.stopDuringStartError=this.stopDuringStartError||e||new Error("The underlying connection was closed before the hub handshake could complete."),this.handshakeResolver&&this.handshakeResolver(),this.cancelCallbacksWithError(e||new Error("Invocation canceled due to the underlying connection being 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this.invocationId++,{arguments:t,invocationId:r.toString(),streamIds:n,target:e,type:o.StreamInvocation}},e.prototype.createCancelInvocation=function(e){return{invocationId:e,type:o.CancelInvocation}},e.prototype.createStreamItemMessage=function(e,t){return{invocationId:e,item:t,type:o.StreamItem}},e.prototype.createCompletionMessage=function(e,t,n){return t?{error:t,invocationId:e,type:o.Completion}:{invocationId:e,result:n,type:o.Completion}},e}(),_=[0,2e3,1e4,3e4,null],I=function(){function e(e){this.retryDelays=void 0!==e?e.concat([null]):_}return e.prototype.nextRetryDelayInMilliseconds=function(e){return this.retryDelays[e.previousRetryCount]},e}();!function(e){e[e.None=0]="None",e[e.WebSockets=1]="WebSockets",e[e.ServerSentEvents=2]="ServerSentEvents",e[e.LongPolling=4]="LongPolling"}(E||(E={})),function(e){e[e.Text=1]="Text",e[e.Binary=2]="Binary"}(S||(S={}));var T=function(){function e(){this.isAborted=!1,this.onabort=null}return 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Object.defineProperty(e.prototype,"pollAborted",{get:function(){return this.pollAbort.aborted},enumerable:!0,configurable:!0}),e.prototype.connect=function(e,t){return k(this,void 0,void 0,function(){var n,r,o,s;return P(this,function(a){switch(a.label){case 0:if(g.a.isRequired(e,"url"),g.a.isRequired(t,"transferFormat"),g.a.isIn(t,S,"transferFormat"),this.url=e,this.logger.log(c.a.Trace,"(LongPolling transport) Connecting."),t===S.Binary&&"undefined"!=typeof XMLHttpRequest&&"string"!=typeof(new XMLHttpRequest).responseType)throw new Error("Binary protocols over XmlHttpRequest not implementing advanced features are not supported.");return n={abortSignal:this.pollAbort.signal,headers:{},timeout:1e5},t===S.Binary&&(n.responseType="arraybuffer"),[4,this.getAccessToken()];case 1:return r=a.sent(),this.updateHeaderToken(n,r),o=e+"&_="+Date.now(),this.logger.log(c.a.Trace,"(LongPolling transport) polling: "+o+"."),[4,this.httpClient.get(o,n)];case 2:return 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a.trys.push([3,5,,6]),r=e+"&_="+Date.now(),this.logger.log(c.a.Trace,"(LongPolling transport) polling: "+r+"."),[4,this.httpClient.get(r,t)];case 4:return 204===(o=a.sent()).statusCode?(this.logger.log(c.a.Information,"(LongPolling transport) Poll terminated by server."),this.running=!1):200!==o.statusCode?(this.logger.log(c.a.Error,"(LongPolling transport) Unexpected response code: "+o.statusCode+"."),this.closeError=new i.b(o.statusText||"",o.statusCode),this.running=!1):o.content?(this.logger.log(c.a.Trace,"(LongPolling transport) data received. 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State.")):(this.sendQueue||(this.sendQueue=new q(this.transport)),this.sendQueue.send(e))},e.prototype.stop=function(e){return B(this,void 0,void 0,function(){var t=this;return j(this,function(n){switch(n.label){case 0:return"Disconnected"===this.connectionState?(this.logger.log(c.a.Debug,"Call to HttpConnection.stop("+e+") ignored because the connection is already in the disconnected state."),[2,Promise.resolve()]):"Disconnecting"===this.connectionState?(this.logger.log(c.a.Debug,"Call to HttpConnection.stop("+e+") ignored because the connection is already in the disconnecting state."),[2,this.stopPromise]):(this.connectionState="Disconnecting",this.stopPromise=new Promise(function(e){t.stopPromiseResolver=e}),[4,this.stopInternal(e)]);case 1:return n.sent(),[4,this.stopPromise];case 2:return n.sent(),[2]}})})},e.prototype.stopInternal=function(e){return B(this,void 0,void 0,function(){var t,n;return j(this,function(r){switch(r.label){case 0:this.stopError=e,r.label=1;case 1:return r.trys.push([1,3,,4]),[4,this.startInternalPromise];case 2:return r.sent(),[3,4];case 3:return r.sent(),[3,4];case 4:if(!this.sendQueue)return[3,9];r.label=5;case 5:return r.trys.push([5,7,,8]),[4,this.sendQueue.stop()];case 6:return r.sent(),[3,8];case 7:return t=r.sent(),this.logger.log(c.a.Error,"TransportSendQueue.stop() threw error '"+t+"'."),[3,8];case 8:this.sendQueue=void 0,r.label=9;case 9:if(!this.transport)return[3,14];r.label=10;case 10:return r.trys.push([10,12,,13]),[4,this.transport.stop()];case 11:return r.sent(),[3,13];case 12:return n=r.sent(),this.logger.log(c.a.Error,"HttpConnection.transport.stop() threw error '"+n+"'."),this.stopConnection(),[3,13];case 13:return this.transport=void 0,[3,15];case 14:this.logger.log(c.a.Debug,"HttpConnection.transport is undefined in HttpConnection.stop() because start() failed."),this.stopConnection(),r.label=15;case 15:return[2]}})})},e.prototype.startInternal=function(e){return B(this,void 0,void 0,function(){var t,n,r,o,i,s;return j(this,function(a){switch(a.label){case 0:t=this.baseUrl,this.accessTokenFactory=this.options.accessTokenFactory,a.label=1;case 1:return a.trys.push([1,12,,13]),this.options.skipNegotiation?this.options.transport!==E.WebSockets?[3,3]:(this.transport=this.constructTransport(E.WebSockets),[4,this.startTransport(t,e)]):[3,5];case 2:return a.sent(),[3,4];case 3:throw new Error("Negotiation can only be skipped when using the WebSocket transport directly.");case 4:return[3,11];case 5:n=null,r=0,o=function(){var e;return j(this,function(o){switch(o.label){case 0:return[4,i.getNegotiationResponse(t)];case 1:if(n=o.sent(),"Disconnecting"===i.connectionState||"Disconnected"===i.connectionState)throw new Error("The connection was stopped during negotiation.");if(n.error)throw new Error(n.error);if(n.ProtocolVersion)throw new Error("Detected a connection attempt to an ASP.NET SignalR Server. This client only supports connecting to an ASP.NET Core SignalR Server. See https://aka.ms/signalr-core-differences for details.");return n.url&&(t=n.url),n.accessToken&&(e=n.accessToken,i.accessTokenFactory=function(){return e}),r++,[2]}})},i=this,a.label=6;case 6:return[5,o()];case 7:a.sent(),a.label=8;case 8:if(n.url&&r<100)return[3,6];a.label=9;case 9:if(100===r&&n.url)throw new Error("Negotiate redirection limit exceeded.");return this.connectionId=n.connectionId,[4,this.createTransport(t,this.options.transport,n,e)];case 10:a.sent(),a.label=11;case 11:return this.transport instanceof x&&(this.features.inherentKeepAlive=!0),"Connecting "===this.connectionState&&(this.logger.log(c.a.Debug,"The HttpConnection connected successfully."),this.connectionState="Connected"),[3,13];case 12:return s=a.sent(),this.logger.log(c.a.Error,"Failed to start the connection: "+s),this.connectionState="Disconnected",this.transport=void 0,[2,Promise.reject(s)];case 13:return[2]}})})},e.prototype.getNegotiationResponse=function(e){return B(this,void 0,void 0,function(){var t,n,r,o,i,s;return j(this,function(a){switch(a.label){case 0:return this.accessTokenFactory?[4,this.accessTokenFactory()]:[3,2];case 1:(r=a.sent())&&((t={}).Authorization="Bearer "+r,n=t),a.label=2;case 2:o=this.resolveNegotiateUrl(e),this.logger.log(c.a.Debug,"Sending negotiation request: "+o+"."),a.label=3;case 3:return a.trys.push([3,5,,6]),[4,this.httpClient.post(o,{content:"",headers:n})];case 4:return 200!==(i=a.sent()).statusCode?[2,Promise.reject(new Error("Unexpected status code returned from negotiate "+i.statusCode))]:[2,JSON.parse(i.content)];case 5:return s=a.sent(),this.logger.log(c.a.Error,"Failed to complete negotiation with the server: "+s),[2,Promise.reject(s)];case 6:return[2]}})})},e.prototype.createConnectUrl=function(e,t){return t?e+(-1===e.indexOf("?")?"?":"&")+"id="+t:e},e.prototype.createTransport=function(e,t,n,r){return B(this,void 0,void 0,function(){var o,i,s,a,u,l,f,h,p,d;return j(this,function(g){switch(g.label){case 0:return o=this.createConnectUrl(e,n.connectionId),this.isITransport(t)?(this.logger.log(c.a.Debug,"Connection was provided an instance of ITransport, using that directly."),this.transport=t,[4,this.startTransport(o,r)]):[3,2];case 1:return g.sent(),[2];case 2:i=[],s=n.availableTransports||[],a=0,u=s,g.label=3;case 3:return a<u.length?(l=u[a],(f=this.resolveTransportOrError(l,t,r))instanceof Error?(i.push(l.transport+" failed: "+f),[3,12]):[3,4]):[3,13];case 4:if(!this.isITransport(f))return[3,12];if(this.transport=f,n.connectionId)return[3,9];g.label=5;case 5:return g.trys.push([5,7,,8]),[4,this.getNegotiationResponse(e)];case 6:return n=g.sent(),[3,8];case 7:return h=g.sent(),[2,Promise.reject(h)];case 8:o=this.createConnectUrl(e,n.connectionId),g.label=9;case 9:return g.trys.push([9,11,,12]),[4,this.startTransport(o,r)];case 10:return g.sent(),[2];case 11:return p=g.sent(),this.logger.log(c.a.Error,"Failed to start the transport '"+l.transport+"': "+p),n.connectionId=void 0,i.push(l.transport+" failed: "+p),"Connecting "!==this.connectionState?(d="Failed to select transport before stop() was called.",this.logger.log(c.a.Debug,d),[2,Promise.reject(new Error(d))]):[3,12];case 12:return a++,[3,3];case 13:return i.length>0?[2,Promise.reject(new Error("Unable to connect to the server with any of the available transports. "+i.join(" ")))]:[2,Promise.reject(new Error("None of the transports supported by the client are supported by the server."))]}})})},e.prototype.constructTransport=function(e){switch(e){case E.WebSockets:if(!this.options.WebSocket)throw new Error("'WebSocket' is not supported in your environment.");return new A(this.httpClient,this.accessTokenFactory,this.logger,this.options.logMessageContent||!1,this.options.WebSocket);case E.ServerSentEvents:if(!this.options.EventSource)throw new Error("'EventSource' is not supported in your environment.");return new O(this.httpClient,this.accessTokenFactory,this.logger,this.options.logMessageContent||!1,this.options.EventSource);case E.LongPolling:return new x(this.httpClient,this.accessTokenFactory,this.logger,this.options.logMessageContent||!1);default:throw new Error("Unknown transport: "+e+".")}},e.prototype.startTransport=function(e,t){var n=this;return this.transport.onreceive=this.onreceive,this.transport.onclose=function(e){return n.stopConnection(e)},this.transport.connect(e,t)},e.prototype.resolveTransportOrError=function(e,t,n){var r=E[e.transport];if(null==r)return this.logger.log(c.a.Debug,"Skipping transport '"+e.transport+"' because it is not supported by this client."),new Error("Skipping transport '"+e.transport+"' because it is not supported by this client.");if(!function(e,t){return!e||0!=(t&e)}(t,r))return this.logger.log(c.a.Debug,"Skipping transport '"+E[r]+"' because it was disabled by the client."),new Error("'"+E[r]+"' is disabled by the client.");if(!(e.transferFormats.map(function(e){return S[e]}).indexOf(n)>=0))return this.logger.log(c.a.Debug,"Skipping transport '"+E[r]+"' because it does not support the requested transfer format '"+S[n]+"'."),new Error("'"+E[r]+"' does not support "+S[n]+".");if(r===E.WebSockets&&!this.options.WebSocket||r===E.ServerSentEvents&&!this.options.EventSource)return this.logger.log(c.a.Debug,"Skipping transport '"+E[r]+"' because it is not supported in your environment.'"),new Error("'"+E[r]+"' is not supported in your environment.");this.logger.log(c.a.Debug,"Selecting transport '"+E[r]+"'.");try{return this.constructTransport(r)}catch(e){return e}},e.prototype.isITransport=function(e){return e&&"object"==typeof e&&"connect"in e},e.prototype.stopConnection=function(e){if(this.logger.log(c.a.Debug,"HttpConnection.stopConnection("+e+") called while in state "+this.connectionState+"."),this.transport=void 0,e=this.stopError||e,this.stopError=void 0,"Disconnected"!==this.connectionState)if("Connecting "!==this.connectionState){if("Disconnecting"===this.connectionState&&this.stopPromiseResolver(),e?this.logger.log(c.a.Error,"Connection disconnected with error '"+e+"'."):this.logger.log(c.a.Information,"Connection disconnected."),this.connectionId=void 0,this.connectionState="Disconnected",this.onclose&&this.connectionStarted){this.connectionStarted=!1;try{this.onclose(e)}catch(t){this.logger.log(c.a.Error,"HttpConnection.onclose("+e+") threw error '"+t+"'.")}}}else this.logger.log(c.a.Warning,"Call to HttpConnection.stopConnection("+e+") was ignored because the connection hasn't yet left the in the connecting state.");else this.logger.log(c.a.Debug,"Call to HttpConnection.stopConnection("+e+") was ignored because the connection is already in the disconnected state.")},e.prototype.resolveUrl=function(e){if(0===e.lastIndexOf("https://",0)||0===e.lastIndexOf("http://",0))return e;if(!g.c.isBrowser||!window.document)throw new Error("Cannot resolve '"+e+"'.");var t=window.document.createElement("a");return t.href=e,this.logger.log(c.a.Information,"Normalizing '"+e+"' to '"+t.href+"'."),t.href},e.prototype.resolveNegotiateUrl=function(e){var t=e.indexOf("?"),n=e.substring(0,-1===t?e.length:t);return"/"!==n[n.length-1]&&(n+="/"),n+="negotiate",n+=-1===t?"":e.substring(t)},e}();var q=function(){function e(e){this.transport=e,this.buffer=[],this.executing=!0,this.sendBufferedData=new W,this.transportResult=new W,this.sendLoopPromise=this.sendLoop()}return e.prototype.send=function(e){return this.bufferData(e),this.transportResult||(this.transportResult=new W),this.transportResult.promise},e.prototype.stop=function(){return this.executing=!1,this.sendBufferedData.resolve(),this.sendLoopPromise},e.prototype.bufferData=function(e){if(this.buffer.length&&typeof this.buffer[0]!=typeof e)throw new Error("Expected data to be of type "+typeof this.buffer+" but was of type "+typeof e);this.buffer.push(e),this.sendBufferedData.resolve()},e.prototype.sendLoop=function(){return B(this,void 0,void 0,function(){var t,n,r;return j(this,function(o){switch(o.label){case 0:return[4,this.sendBufferedData.promise];case 1:if(o.sent(),!this.executing)return this.transportResult&&this.transportResult.reject("Connection stopped."),[3,6];this.sendBufferedData=new W,t=this.transportResult,this.transportResult=void 0,n="string"==typeof this.buffer[0]?this.buffer.join(""):e.concatBuffers(this.buffer),this.buffer.length=0,o.label=2;case 2:return o.trys.push([2,4,,5]),[4,this.transport.send(n)];case 3:return o.sent(),t.resolve(),[3,5];case 4:return r=o.sent(),t.reject(r),[3,5];case 5:return[3,0];case 6:return[2]}})})},e.concatBuffers=function(e){for(var t=e.map(function(e){return e.byteLength}).reduce(function(e,t){return e+t}),n=new Uint8Array(t),r=0,o=0,i=e;o<i.length;o++){var s=i[o];n.set(new Uint8Array(s),r),r+=s.byteLength}return n},e}(),W=function(){function e(){var e=this;this.promise=new Promise(function(t,n){var r;return r=[t,n],e.resolver=r[0],e.rejecter=r[1],r})}return e.prototype.resolve=function(){this.resolver()},e.prototype.reject=function(e){this.rejecter(e)},e}(),z=n(6),Y=n(7),J="json",K=function(){function e(){this.name=J,this.version=1,this.transferFormat=S.Text}return e.prototype.parseMessages=function(e,t){if("string"!=typeof e)throw new Error("Invalid input for JSON hub protocol. 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  */
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DotNet.attachDispatcher({beginInvokeDotNetFromJS:function(e,t,n,r,o){i.send("BeginInvokeDotNetFromJS",e?e.toString():null,t,n,r||0,o)},endInvokeJSFromDotNet:function(e,t,n){i.send("EndInvokeJSFromDotNet",e,t,n)}}),[2,i]}})})}function E(e,t,n){n.log(h.LogLevel.Error,t),e&&e.stop()}window.Blazor.start=m,u.shouldAutoStart()&&m()},function(e,t,n){"use strict";t.byteLength=function(e){var t=u(e),n=t[0],r=t[1];return 3*(n+r)/4-r},t.toByteArray=function(e){for(var t,n=u(e),r=n[0],s=n[1],a=new i(function(e,t,n){return 3*(t+n)/4-n}(0,r,s)),c=0,l=s>0?r-4:r,f=0;f<l;f+=4)t=o[e.charCodeAt(f)]<<18|o[e.charCodeAt(f+1)]<<12|o[e.charCodeAt(f+2)]<<6|o[e.charCodeAt(f+3)],a[c++]=t>>16&255,a[c++]=t>>8&255,a[c++]=255&t;2===s&&(t=o[e.charCodeAt(f)]<<2|o[e.charCodeAt(f+1)]>>4,a[c++]=255&t);1===s&&(t=o[e.charCodeAt(f)]<<10|o[e.charCodeAt(f+1)]<<4|o[e.charCodeAt(f+2)]>>2,a[c++]=t>>8&255,a[c++]=255&t);return a},t.fromByteArray=function(e){for(var t,n=e.length,o=n%3,i=[],s=0,a=n-o;s<a;s+=16383)i.push(l(e,s,s+16383>a?a:s+16383));1===o?(t=e[n-1],i.push(r[t>>2]+r[t<<4&63]+"==")):2===o&&(t=(e[n-2]<<8)+e[n-1],i.push(r[t>>10]+r[t>>4&63]+r[t<<2&63]+"="));return i.join("")};for(var r=[],o=[],i="undefined"!=typeof Uint8Array?Uint8Array:Array,s="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",a=0,c=s.length;a<c;++a)r[a]=s[a],o[s.charCodeAt(a)]=a;function u(e){var t=e.length;if(t%4>0)throw new Error("Invalid string. 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 /*!
  * The buffer module from node.js, for the browser.
  *
diff --git a/src/Components/Web.JS/src/Boot.Server.ts b/src/Components/Web.JS/src/Boot.Server.ts
index df96f1031f54..e52113d7acd4 100644
--- a/src/Components/Web.JS/src/Boot.Server.ts
+++ b/src/Components/Web.JS/src/Boot.Server.ts
@@ -47,6 +47,16 @@ async function boot(userOptions?: Partial<BlazorOptions>): Promise<void> {
     return true;
   };
 
+  window.addEventListener(
+    'unload',
+    () => {
+      const data = new FormData();
+      data.set('circuitId', circuit.circuitId);
+      navigator.sendBeacon('_blazor/disconnect', data);
+    },
+    false
+  );
+
   window['Blazor'].reconnect = reconnect;
 
   logger.log(LogLevel.Information, 'Blazor server-side application started.');
diff --git a/src/Components/test/E2ETest/ServerExecutionTests/CircuitGracefulTerminationTests.cs b/src/Components/test/E2ETest/ServerExecutionTests/CircuitGracefulTerminationTests.cs
index f38381838636..188fae57d008 100644
--- a/src/Components/test/E2ETest/ServerExecutionTests/CircuitGracefulTerminationTests.cs
+++ b/src/Components/test/E2ETest/ServerExecutionTests/CircuitGracefulTerminationTests.cs
@@ -55,7 +55,7 @@ protected override void InitializeAsyncCore()
         public async Task ReloadingThePage_GracefullyDisconnects_TheCurrentCircuit()
         {
             // Arrange & Act
-            _ = ((IJavaScriptExecutor)Browser).ExecuteScript("location.reload()");
+            Browser.Navigate().Refresh();
             await Task.WhenAny(Task.Delay(10000), GracefulDisconnectCompletionSource.Task);
 
             // Assert
@@ -70,7 +70,6 @@ public async Task ClosingTheBrowserWindow_GracefullyDisconnects_TheCurrentCircui
             Browser.Close();
             // Set to null so that other tests in this class can create a new browser if necessary so
             // that tests don't fail when running together.
-            Browser = null;
 
             await Task.WhenAny(Task.Delay(10000), GracefulDisconnectCompletionSource.Task);