cytoscape : update node style on click event

app.js

//watch all nodes for a click
  cy.on('click', 'node', function(evt){      
      //add the labeling style to show the name on the specific one clicked
      cy.$('#'+this.id()).style({
        "content": this[0]._private.data.name,
        "font-size": "12px",
        "text-valign": "top",
        "text-halign": "center"
      }); 
  });