title: Fixed header and scrollable body
body: <p>I have like 15 columns in the table.  I want to scroll both horizontal and vertical and header should be fixed when I scroll vertical.  I have tried various examples but no luck. All I see header columns are not aligning with data. Column width are not fixed as number of columns vary based on the user selection</p>
  
  <p>Please guide me to the correct example.</p>