title: How to disable or hide a button in intro.js for a specific step?
body: <p>Currently, I am facing an issue, when I try to disabling a button in a particular step ?</p>
  
  <p>my code is like this</p>
  
  <pre><code>var intro = introJs();
  
  intro.setOptions({
      steps: [
          {
              element: "#add_temp",
              intro: "Add your template"
          },            
          {
              element: "#addButton",
              intro: "Please click on add button ",
              position:'left',  
              hideNext: true            
        }
    ],    
  })
  </code></pre>