title: datatables columnDefs not working: jquery / javascript
body: <p>My datatable loads perfectly except the columndefs do not work.
  Anybody got a clue?
  Please help. I just want to add a click event to every cell in column 1. I get no errors either.
  It works in this example on the end column...<a href="https://datatables.net/examples/ajax/null_data_source.html" rel="nofollow">https://datatables.net/examples/ajax/null_data_source.html</a></p>
  
  <pre><code>var table =  $mytable.DataTable( {            
              "serverSide": true,
              "ajax": {
                  "url": url_string,
                  "cache": true,
                  "columnDefs": [ 
                  {"targets": 1,"data": null,"defaultContent": "&lt;button&gt;Select Image ID&lt;/button&gt;"} ,  
  
                  ]
              },
          });
  </code></pre>