pug different view if logged in or out

src/public/chat.js

@@ -0,0 +1,11 @@
+const socket = io();
+const form = document.getElementById('form');
+const input = document.getElementById('input');
+
+form.addEventListener('submit', function(e) {
+    e.preventDefault();
+    if (input.value) {
+        socket.emit('chat message', input.value);
+        input.value = '';
+    }
+});