title: How to create the following type of json array using javascript?
body: <p>How to create the following type of json array using javascript?</p>
  
  <pre><code>xAxis: {
      categories: [
          'Jan',
          'Feb',
          'Mar',
          'Apr',
          'May',
          'Jun',
          'Jul',
          'Aug',
          'Sep',
          'Oct',
          'Nov',
          'Dec'
      ]
  }
  </code></pre>