Live Reload client-server

livereload-client.js

// <script src="node_modules/socket.io/node_modules/socket.io-client/dist/socket.io.js"></script>

var socket = io.connect();
socket.on('server:reload', function(message) {
    document.location.reload();
});

livereload-server.js

var io = require('socket.io').listen(app);
var fs = require('fs');

function watchDirRecursive(directory, extensions, fn) {
  fs.readdir(directory, function(err, files) {
    if (err) throw err;

    for (var i = 0; i < files.length; i++) {
      var file = directory + '/' + files[i];
      var stat = fs.statSync(file);

      if (stat.isDirectory() && files[i][0] != '.') {
        watchDirRecursive(file, extensions, fn);
      } else if (stat.isFile()) {
        var extIdx = file.lastIndexOf('.');
        if (extIdx > 0 && extensions.indexOf(file.substr(extIdx+1)) > -1) {
          fs.watchFile(file, fn);
        }
      }
    }
  });
}

watchDirRecursive('.', ['html', 'css', 'js'], function() {
  io.sockets.emit('server:reload');
});