title: How do I make classes work in Cytoscape.js
body: <p>I am trying to add a class to the node, to have all my css in a stylesheet file, not inside javascrpt declaration.</p>
  
  <pre><code>  var values = {
      nodes: [
        { data: { id: 'explore'}, 
          classes: 'ClassName1'
        },
        { data: { id: 'discover' } }
      ],
      edges: [
        { data: { source: 'explore', target: 'discover' } }
      ]
  };
  </code></pre>
  
  <p>As you can see I am adding classes and the class name, but nothing happens. </p>