add backend chat

src/script.js

@@ -1,3 +1,6 @@
+var socket;
+var username = "";
+
 function addMessage(author, message) {
     var li = document.createElement("li");
     li.innerHTML = "<b>" + author + ": </b>";
@@ -6,6 +9,7 @@ function addMessage(author, message) {
 }
 
 function sendMessage() {
+    socket.emit("message",  {message: document.getElementById("message-input").value});
     document.getElementById("message-input").value = "";
 }
 
@@ -13,12 +17,21 @@ function sendMessage() {
 document.addEventListener("DOMContentLoaded", () => {
 
     try {
-        var socket = io("https://danby.aniere.fr:3000");
+        socket = io("https://danby.aniere.fr:3000");
 
         socket.on("update-count", (data) => {
             document.getElementById("value").innerText = data.value;
         });
 
+        socket.on("username", (data) => {
+            username = data.username;
+        });
+
+        socket.on("new-message", (data) => {
+            addMessage(data.author, data.message);
+        });
+
+
     } catch(error) {
         document.getElementById("value").innerText = "Serveur injoingnable !";
     }