title: what is 'require' function is ReactJS?
body: <p>Take the below sample code for example.</p>
  
  <pre><code>require('react-bootstrap-datetimepicker');
  
  ...
  
  render: function() {
    return &lt;DateTimeField /&gt;;
  }
  </code></pre>
  
  <p>The datatimepicker is a third party library that can be used in my own code, but if I add the piece of code in the js, the firebug will tell me that the <strong>require</strong> can not be found. If I should translate the piece of code or do something? Thanks very much </p>