Fixed weird things when window lost focus

client/main.js

@@ -101,6 +101,9 @@ const socket = io({
 });
 socket.on('connect', function () {
   console.log('connected');
+  $(window).focus(function () {
+    socket.emit('history', current);
+  });
 });
 socket.on('disconnect', function () {
   console.log('disconnected');
@@ -114,6 +117,10 @@ socket.on('info', function (res) {
   drawGame()
 });
 
+socket.on('history', function (h) {
+  history = h;
+});
+
 socket.on('players', function (p) {
   players = p;
 });

server.js

@@ -160,6 +160,10 @@ io.on('connection', function (socket) {
     hsize:HSIZE
   });
 
+  socket.on('history', function () {
+    socket.emit('history', history);
+  });
+
   socket.on('disconnect', function () {
     delete players[socket.name];
     delete history[socket.name];