.eslintrc.js

@@ -29,6 +29,7 @@ module.exports = {
         "semi": [
             "error",
             "always"
-        ]
+        ],
+				"no-mixed-spaces-and-tabs": "off"
     }
-};
+};

src/index.js

@@ -31,23 +31,27 @@ app.get("/", (req, res) => {
 io.on("connection", (socket) => {
   // Handle disconnection
   socket.on("disconnect", () => {
-    const room = players[socket.id].room;
-    delete players[socket.id];
+		
+    if (players[socket.id]) {
+	    const room = players[socket.id].room;
 
-    var playerUpdate = {};
-    if (io.sockets.adapter.rooms[room]) {
-      for (const id in io.sockets.adapter.rooms[room].sockets) {
-        playerUpdate[id] = players[id];
-      }
-    }
+    	var playerUpdate = {};
+    	if (io.sockets.adapter.rooms[room]) {
+      	for (const id in io.sockets.adapter.rooms[room].sockets) {
+        	playerUpdate[id] = players[id];
+      	}
+    	}
 
-    io.in(room).emit("roomUpdate", playerUpdate);
+    	io.in(room).emit("roomUpdate", playerUpdate);
     
-    console.log(traffic.out + colours.disconnect(`User ${String(socket.id)} disconnected from room ${room}`));
+    	console.log(traffic.out + colours.disconnect(`User ${String(socket.id)} disconnected from room ${room}`));
 
-    if (io.sockets.adapter.rooms[room] == undefined) {
-      console.log(traffic.int + colours.room(`Room ${room} has been deleted due to a lack of players`));
+    	if (io.sockets.adapter.rooms[room] == undefined) {
+      	console.log(traffic.int + colours.room(`Room ${room} has been deleted due to a lack of players`));
+    	}
     }
+
+    delete players[socket.id];
   });
 
   // Request identification
@@ -125,4 +129,4 @@ io.on("connection", (socket) => {
 
 http.listen(port, () => {
   console.log(colours.data(`\nServer ready, listening on port ${port}\n`));
-});
+});