rauchg · abdulrahmanelfeky · Mar 8, 2017 · Mar 8, 2017 · Mar 8, 2017 · Mar 8, 2017
diff --git a/.replit b/.replit
@@ -0,0 +1,2 @@
+language = "nodejs"
+run = "node index.js"
diff --git a/LICENSE b/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2021 Guillermo Rauch
+
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/README.md b/README.md
@@ -1,7 +1,15 @@
 # chat-example
 
-This is the source code for a very simple chat example used for 
-the [Getting Started](http://socket.io/get-started/chat/) guide 
+This is the source code for a very simple chat example used for
+the [Getting Started](http://socket.io/get-started/chat/) guide
 of the Socket.IO website.
 
 Please refer to it to learn how to run this application.
+
+You can also spin up a free Heroku dyno to test it out:
+
+[![Deploy](https://www.herokucdn.com/deploy/button.png)](https://heroku.com/deploy?template=https://github.com/socketio/chat-example)
+
+Or run it on [Repl.it](https://repl.it/):
+
+[![Run on Repl.it](https://repl.it/badge/github/socketio/chat-example)](https://repl.it/github/socketio/chat-example)
diff --git a/app.json b/app.json
@@ -0,0 +1,22 @@
+{
+  "name": "Socket-Chat-Example",
+  "description": "my first socket.io app",
+  "website": "https://github.com/socketio/chat-example",
+  "repository": "https://github.com/socketio/chat-example",
+  "logo": "https://node-js-sample.herokuapp.com/node.svg",
+  "success_url": "/",
+  "keywords": [
+    "node",
+    "express",
+    "socket.io",
+    "realtime",
+    "websocket"
+  ],
+  "scripts": {
+  },
+  "addons": [
+  ],
+  "env": {
+    "BUILDPACK_URL": "https://github.com/heroku/heroku-buildpack-nodejs"
+  }
+}
diff --git a/index.html b/index.html
@@ -1,34 +1,48 @@
-<!doctype html>
+<!DOCTYPE html>
 <html>
   <head>
+    <meta name="viewport" content="width=device-width,initial-scale=1.0">
     <title>Socket.IO chat</title>
     <style>
-      * { margin: 0; padding: 0; box-sizing: border-box; }
-      body { font: 13px Helvetica, Arial; }
-      form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
-      form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
-      form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
+      body { margin: 0; padding-bottom: 3rem; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
+
+      #form { background: rgba(0, 0, 0, 0.15); padding: 0.25rem; position: fixed; bottom: 0; left: 0; right: 0; display: flex; height: 3rem; box-sizing: border-box; backdrop-filter: blur(10px); }
+      #input { border: none; padding: 0 1rem; flex-grow: 1; border-radius: 2rem; margin: 0.25rem; }
+      #input:focus { outline: none; }
+      #form > button { background: #333; border: none; padding: 0 1rem; margin: 0.25rem; border-radius: 3px; outline: none; color: #fff; }
+
       #messages { list-style-type: none; margin: 0; padding: 0; }
-      #messages li { padding: 5px 10px; }
-      #messages li:nth-child(odd) { background: #eee; }
+      #messages > li { padding: 0.5rem 1rem; }
+      #messages > li:nth-child(odd) { background: #efefef; }
     </style>
   </head>
   <body>
     <ul id="messages"></ul>
-    <form action="">
-      <input id="m" autocomplete="off" /><button>Send</button>
+    <form id="form" action="">
+      <input id="input" autocomplete="off" /><button>Send</button>
     </form>
-    <script src="https://cdn.socket.io/socket.io-1.2.0.js"></script>
-    <script src="http://code.jquery.com/jquery-1.11.1.js"></script>
+    <script src="/socket.io/socket.io.js"></script>
+
     <script>
-      var socket = io();
-      $('form').submit(function(){
-        socket.emit('chat message', $('#m').val());
-        $('#m').val('');
-        return false;
+      const socket = io();
+
+      const messages = document.getElementById('messages');
+      const form = document.getElementById('form');
+      const input = document.getElementById('input');
+
+      form.addEventListener('submit', (e) => {
+        e.preventDefault();
+        if (input.value) {
+          socket.emit('chat message', input.value);
+          input.value = '';
+        }
       });
-      socket.on('chat message', function(msg){
-        $('#messages').append($('<li>').text(msg));
+
+      socket.on('chat message', (msg) => {
+        const item = document.createElement('li');
+        item.textContent = msg;
+        messages.appendChild(item);
+        window.scrollTo(0, document.body.scrollHeight);
       });
     </script>
   </body>

diff --git a/index.js b/index.js
@@ -1,17 +1,20 @@
-var app = require('express')();
-var http = require('http').Server(app);
-var io = require('socket.io')(http);
+const app = require('express')();
+const http = require('http').Server(app);
+const io = require('socket.io')(http);
+const host = process.env.HOST || 'localhost';
+const port = process.env.PORT || 3000;
+const path = require('path')
 
-app.get('/', function(req, res){
-  res.sendFile(__dirname + '/index.html');
+app.get('/', (req, res) => {
+  res.sendFile(path.join(__dirname, 'index.html'));
 });
 
-io.on('connection', function(socket){
-  socket.on('chat message', function(msg){
+io.on('connection', (socket) => {
+  socket.on('chat message', msg => {
     io.emit('chat message', msg);
   });
 });
 
-http.listen(3000, function(){
-  console.log('listening on *:3000');
+http.listen(port, host, () => {
+  console.log(`Socket.IO server running at http://${host}:${port}/`);
 });