FCC Advanced Node and Express Socket.IO Checkpoint 2 (Client)

client.js

$( document ).ready(function() {
  
  /*global io*/
  var socket = io();
   
  $('form').submit(function(){
    var messageToSend = $('#m').val();
    socket.emit('chat message', messageToSend);
    $('#m').val('');
    return false; // prevent form submit from refreshing page
  });
  
  socket.on('user', function(data){
    $('#num-users').text(data.currentUsers+' users online');
    var message = data.name;
    if(data.connected) {
      message += ' has joined the chat.';
    } else {
      message += ' has left the chat.';
    }
    $('#messages').append($('<li>').html('<b>'+ message +'</b>'));
  });
  
  socket.on('chat message', function(data){
    $('#messages').append($('<li>').text(data.name+': '+data.message));
  });
  
});