diff --git a/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/connectionTests.html b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/connectionTests.html
index f3a938a1eb..7967abbd2f 100644
--- a/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/connectionTests.html
+++ b/client-ts/Microsoft.AspNetCore.SignalR.Test.Server/wwwroot/connectionTests.html
@@ -8,8 +8,21 @@
     <script type="text/javascript" src="lib/jasmine/jasmine.js"></script>
     <script type="text/javascript" src="lib/jasmine/jasmine-html.js"></script>
     <script type="text/javascript" src="lib/jasmine/boot.js"></script>
-    <script type="text/javascript" src="lib/signalr/signalr-clientES5.min.js"></script>
-    <script type="text/javascript" src="lib/signalr/signalr-msgpackprotocolES5.min.js"></script>
+    <script type="text/javascript">
+        if (typeof Promise === 'undefined')
+        {
+            document.write(
+                '<script type="text/javascript" src="lib/signalr/signalr-clientES5.min.js"><\/script>' +
+                '<script type="text/javascript" src="lib/signalr/signalr-msgpackprotocolES5.min.js"><\/script>');
+        }
+        else
+        {
+            document.write(
+                '<script type="text/javascript" src="lib/signalr/signalr-client.min.js"><\/script>' +
+                '<script type="text/javascript" src="lib/signalr/signalr-msgpackprotocol.min.js"><\/script>');
+        }
+    </script>
+
     <script src="js/common.js"></script>
     <script src="js/webSocketTests.js"></script>
     <script src="js/connectionTests.js"></script>
diff --git a/samples/SocketsSample/SocketsSample.csproj b/samples/SocketsSample/SocketsSample.csproj
index 16813a0a04..a13f23bb79 100644
--- a/samples/SocketsSample/SocketsSample.csproj
+++ b/samples/SocketsSample/SocketsSample.csproj
@@ -28,7 +28,10 @@
   </ItemGroup>
 
   <Target Name="CopyTSClient" BeforeTargets="AfterBuild">
-    <Copy SourceFiles="$(MSBuildThisFileDirectory)..\..\client-ts\dist\browser\signalr-client.js" DestinationFolder="$(MSBuildThisFileDirectory)wwwroot\lib\signalr-client" />
+    <ItemGroup>
+      <SignalRJSClientFiles Include="$(MSBuildThisFileDirectory)..\..\client-ts\dist\browser\*" />
+    </ItemGroup>
+    <Copy SourceFiles="@(SignalRJSClientFiles)" DestinationFolder="$(MSBuildThisFileDirectory)wwwroot\lib\signalr-client" />
   </Target>
 
 </Project>
diff --git a/samples/SocketsSample/wwwroot/hubs.html b/samples/SocketsSample/wwwroot/hubs.html
index 991aec191b..0db3fb5bb3 100644
--- a/samples/SocketsSample/wwwroot/hubs.html
+++ b/samples/SocketsSample/wwwroot/hubs.html
@@ -49,24 +49,37 @@
     <ul id="message-list"></ul>
 </body>
 </html>
-<script src="lib/signalr-client/signalr-client.js"></script>
+<script type="text/javascript">
+    if (typeof Promise === 'undefined')
+    {
+        document.write(
+            '<script type="text/javascript" src="lib/signalr-client/signalr-clientES5.js"><\/script>' +
+            '<script type="text/javascript" src="lib/signalr-client/signalr-msgpackprotocolES5.js"><\/script>');
+    }
+    else
+    {
+        document.write(
+            '<script type="text/javascript" src="lib/signalr-client/signalr-client.js"><\/script>' +
+            '<script type="text/javascript" src="lib/signalr-client/signalr-msgpackprotocol.js"><\/script>');
+    }
+</script>
 <script src="utils.js"></script>
 <script>
 var isConnected = false;
-function invoke(connection, method, ...args) {
+function invoke(connection, method) {
     if (!isConnected) {
         return;
     }
     var argsArray = Array.prototype.slice.call(arguments);
     connection.invoke.apply(connection, argsArray.slice(1))
-            .then(result => {
+            .then(function(result) {
                 console.log("invocation completed successfully: " + (result === null ? '(null)' : result));
 
                 if (result) {
                     addLine('message-list', result);
                 }
             })
-            .catch(err => {
+            .catch(function(err) {
                 addLine('message-list', err, 'red');
             });
 }
@@ -87,17 +100,17 @@ let disconnectButton = document.getElementById('disconnect');
 disconnectButton.disabled = true;
 var connection;
 
-click('connect', event => {
+click('connect', function(event) {
     connectButton.disabled = true;
     disconnectButton.disabled = false;
-    console.log(`http://${document.location.host}/${hubRoute}`);
-    let http = new signalR.HttpConnection(`http://${document.location.host}/${hubRoute}`, { transport: transportType, logger: logger });
+    console.log('http://' + document.location.host + '/' + hubRoute);
+    let http = new signalR.HttpConnection('http://' + document.location.host + '/' + hubRoute, { transport: transportType, logger: logger });
     connection = new signalR.HubConnection(http, logger);
-    connection.on('Send', msg => {
+    connection.on('Send', function(msg) {
         addLine('message-list', msg);
     });
 
-    connection.onClosed = e => {
+    connection.onClosed = function(e) {
         if (e) {
             addLine('message-list', 'Connection closed with error: ' + e, 'red');
         }
@@ -107,46 +120,46 @@ click('connect', event => {
     }
 
     connection.start()
-        .then(() => {
+        .then(function() {
             isConnected = true;
             addLine('message-list', 'Connected successfully', 'green');
         })
-        .catch(err => {
+        .catch(function(err) {
             addLine('message-list', err, 'red');
         });
 });
 
-click('disconnect', event => {
+click('disconnect', function(event) {
     connectButton.disabled = false;
     disconnectButton.disabled = true;
     connection.stop()
-        .then(() => {
+        .then(function() {
             isConnected = false;
         });
 });
 
-click('broadcast', event => {
+click('broadcast', function(event) {
     let data = getText('message-text');
     invoke(connection, 'Send', data);
 });
 
-click('join-group', event => {
+click('join-group', function(event) {
     let groupName = getText('message-text');
     invoke(connection, 'JoinGroup', groupName);
 });
 
-click('leave-group', event => {
+click('leave-group', function(event) {
     let groupName = getText('message-text');
     invoke(connection, 'LeaveGroup', groupName);
 });
 
-click('groupmsg', event => {
+click('groupmsg', function(event) {
     let groupName = getText('target');
     let message = getText('private-message-text');
     invoke(connection, 'SendToGroup', groupName, message);
 });
 
-click('send', event => {
+click('send', function(event) {
     let data = getText('me-message-text');
     invoke(connection, 'Echo', data);
 });
diff --git a/samples/SocketsSample/wwwroot/sockets.html b/samples/SocketsSample/wwwroot/sockets.html
index 5716406924..eedc287e7b 100644
--- a/samples/SocketsSample/wwwroot/sockets.html
+++ b/samples/SocketsSample/wwwroot/sockets.html
@@ -13,32 +13,41 @@
     </form>
 
     <ul id="messages"></ul>
-    <script src="lib/signalr-client/signalr-client.js"></script>
+    <script type="text/javascript">
+        if (typeof Promise === 'undefined')
+        {
+            document.write('<script type="text/javascript" src="lib/signalr-client/signalr-clientES5.js"><\/script>');
+        }
+        else
+        {
+            document.write('<script type="text/javascript" src="lib/signalr-client/signalr-client.js"><\/script>');
+        }
+    </script>
     <script src="utils.js"></script>
     <script>
-        document.addEventListener('DOMContentLoaded', () => {
+        document.addEventListener('DOMContentLoaded', function() {
             let transportType = signalR.TransportType[getParameterByName('transport')] || signalR.TransportType.WebSockets;
 
             document.getElementById('transportName').innerHTML = signalR.TransportType[transportType];
 
-            let url = `http://${document.location.host}/chat`
+            let url = 'http://' + document.location.host + '/chat';
             let connection = new signalR.HttpConnection(url, { transport: transportType, logger: new signalR.ConsoleLogger(signalR.LogLevel.Information) });
 
-            connection.onDataReceived = data => {
+            connection.onDataReceived =  function(data) {
                 let child = document.createElement('li');
                 child.innerText = data;
                 document.getElementById('messages').appendChild(child);
             };
 
-            document.getElementById('sendmessage').addEventListener('submit', event => {
+            document.getElementById('sendmessage').addEventListener('submit', function(event) {
                 let data = document.getElementById('data').value;
                 connection.send(data);
                 event.preventDefault();
             });
 
-            connection.start().then(() => {
+            connection.start().then(function() {
                 console.log("Opened");
-            }, () => {
+            }, function() {
                 console.log("Error opening connection");
             });
         });
diff --git a/samples/SocketsSample/wwwroot/streaming.html b/samples/SocketsSample/wwwroot/streaming.html
index 42c27f6b42..213245f1bc 100644
--- a/samples/SocketsSample/wwwroot/streaming.html
+++ b/samples/SocketsSample/wwwroot/streaming.html
@@ -23,10 +23,23 @@
     <ul id="resultsList"></ul>
 
     <ul id="messages"></ul>
-    <script src="lib/signalr-client/signalr-client.js"></script>
+    <script type="text/javascript">
+        if (typeof Promise === 'undefined')
+        {
+            document.write(
+                '<script type="text/javascript" src="lib/signalr-client/signalr-clientES5.js"><\/script>' +
+                '<script type="text/javascript" src="lib/signalr-client/signalr-msgpackprotocolES5.js"><\/script>');
+        }
+        else
+        {
+            document.write(
+                '<script type="text/javascript" src="lib/signalr-client/signalr-client.js"><\/script>' +
+                '<script type="text/javascript" src="lib/signalr-client/signalr-msgpackprotocol.js"><\/script>');
+        }
+    </script>
     <script src="utils.js"></script>
     <script>
-        document.addEventListener('DOMContentLoaded', () => {
+        document.addEventListener('DOMContentLoaded', function() {
             let resultsList = document.getElementById('resultsList');
             let channelButton = document.getElementById('channelButton');
             let observableButton = document.getElementById('observableButton');
@@ -42,7 +55,7 @@
 
             document.getElementById('transportName').innerHTML = signalR.TransportType[transportType];
 
-            let url = `http://${document.location.host}/streaming`
+            let url = 'http://' + document.location.host + '/streaming';
             let connection = null;
 
             click('clearButton', function () {
@@ -87,17 +100,17 @@
             function run(method) {
                 let id = invocationCounter;
                 invocationCounter += 1;
-                addLine('resultsList', `running ${method}(${id}) ...`);
+                addLine('resultsList', 'running ' + method + '(' + id + ') ...');
                 connection.stream(method, 10, (Math.random() * 5) * 200).subscribe({
                     closed: false,
                     next: function (item) {
-                        addLine('resultsList', `${method}(${id}): ${item}`);
+                        addLine('resultsList', method + '(' + id + '): ' + item);
                     },
                     error: function (err) {
-                        addLine('resultsList', `${method}(${id}): ${err}`, 'red');
+                        addLine('resultsList', method + '(' + id + '):' + err, 'red');
                     },
                     complete: function () {
-                        addLine('resultsList', `${method}(${id}): complete`, 'green');
+                        addLine('resultsList', method + '(' +  id + '): complete', 'green');
                     }
                 });
             }
diff --git a/samples/SocketsSample/wwwroot/utils.js b/samples/SocketsSample/wwwroot/utils.js
index 8bf6b7c2b3..3572d81886 100644
--- a/samples/SocketsSample/wwwroot/utils.js
+++ b/samples/SocketsSample/wwwroot/utils.js
@@ -11,7 +11,7 @@ function getParameterByName(name, url) {
 }
 
 function click(id, callback) {
-    document.getElementById(id).addEventListener('click', event => {
+    document.getElementById(id).addEventListener('click', function (event) {
         callback(event);
         event.preventDefault();
     });