added hub script

BinaryDad.Coding/Pages/Index.cshtml

@@ -4,7 +4,14 @@
     ViewData["Title"] = "Home page";
 }
 
+@section Scripts
+{
+    <script src="~/js/signalr/dist/browser/signalr.js"></script>
+    <script src="~/js/hub.js"></script>
+}
+
 <div class="text-center">
-    <h1 class="display-4">Welcome</h1>
+
-    <p>Learn about <a href="https://docs.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>
+
+
 </div>

BinaryDad.Coding/wwwroot/js/hub.js

@@ -0,0 +1,28 @@
+var connection = new signalR.HubConnectionBuilder().withUrl("/chatHub").build();
+
+//Disable send button until connection is established
+document.getElementById("sendButton").disabled = true;
+
+connection.on("ReceiveMessage", function (user, message) {
+    var li = document.createElement("li");
+    document.getElementById("messagesList").appendChild(li);
+    // We can assign user-supplied strings to an element's textContent because it
+    // is not interpreted as markup. If you're assigning in any other way, you 
+    // should be aware of possible script injection concerns.
+    li.textContent = `${user} says ${message}`;
+});
+
+connection.start().then(function () {
+    document.getElementById("sendButton").disabled = false;
+}).catch(function (err) {
+    return console.error(err.toString());
+});
+
+document.getElementById("sendButton").addEventListener("click", function (event) {
+    var user = document.getElementById("userInput").value;
+    var message = document.getElementById("messageInput").value;
+    connection.invoke("SendMessage", user, message).catch(function (err) {
+        return console.error(err.toString());
+    });
+    event.preventDefault();
+});