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HTML

              
                <table id="persontable">
  <thead>
    <tr>
      <td>First Name</td>
      <td>Last Name</td>
      <td>Address</td>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Bill</td>
      <td>Bob</td>
      <td>Already here</td>
    </tr>
  </tbody>
</table>

<template id="person">
  <tr>
    <td class="record"></td>
    <td></td>
    <td></td>
  </tr>
</template>

<template id="address">
    <td class="record"></td>
</template>
              
            
!

CSS

              
                
              
            
!

JS

              
                // Test to see if the browser supports the HTML template element by checking
// for the presence of the template element's content attribute.
if ('content' in document.createElement('template')) {

  // Instantiate the table with the existing HTML tbody and the row with the template
  var fullnameTemplate = document.querySelector('#person'),
  td = fullnameTemplate.content.querySelectorAll("td");
  td[0].textContent = "Peter";
  td[1].textContent = "O'Toole";
  td[2].textContent = "100 ABC Street";

  // Clone the new row and insert it into the table
  var tbody = document.getElementsByTagName("tbody");
  var clone = document.importNode(fullnameTemplate.content, true);
  tbody[0].appendChild(clone);
  
  // Create a new row
  td[0].textContent = "Dudley";
  td[1].textContent = "Moore";
  td[2].textContent = "999 Lala Street";

  // Clone the new row and insert it into the table
  var clone2 = document.importNode(fullnameTemplate.content, true);
  tbody[0].appendChild(clone2);

} else {
  // Find another way to add the rows to the table because 
  // the HTML template element is not supported.
}
              
            
!
999px

Console