javascript - Avoid duplication using jquery -


how avoid duplication of data using jquery? code :

<button  id="gen">generate</button> <table id="report" border="1" style="visibility:hidden">     <tr>         <th>sl.no.</th>         <th>district name</th>     </tr> </table>

js:

$("#gen").click(function(){ $("#report").css("visibility","visible"); for(var i=0; i<5; i++){   var row='<tr><td>('+(i+1)+')</td></tr>'   $("#report").append(row);  } });

each time when clicking button, same data shown. how avoid it? sqlfiddle: http://jsfiddle.net/etdx5o08/

do this:

$("#gen").click(function() {         $("#report").parent().show();         var rows='';         (var = 0; < 5; i++) {           rows = rows+'<tr><td>(' + (i + 1) + ')</td><td></td></tr>'         }         $("#report").html(rows);       });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <button id="gen">generate</button>      <table border="1" style="display:none">          <thead>              <tr>                  <th>sl.no.</th>                  <th>district name</th>              </tr>          </thead>          <tbody id="report"></tbody>      </table>


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