Checkbox appearing and then vanishing

Hi all, I’m trying to add checkboxes to a table and put a button in the bottom row to action on the checked boxes.

I’ve managed to get a button in the final row, however, it vanishes once the page has loaded! The images below show the same problem but with a checkbox.

Does anyone know why this is? I’m using the code from the Knack Dev doc examples (also shown below).

// Function that adds checkboxes
var addCheckboxes = function(view) {
  // Add the checkbox to to the header to select/unselect all
  $('#' + view.key + '.kn-table thead tr').prepend('<th><input type="checkbox"></th>');
  $('#' + view.key + '.kn-table thead input').change(function() {
    $('.' + view.key + '.kn-table tbody tr input').each(function() {
      $(this).attr('checked', $('#' + view.key + '.kn-table thead input').attr('checked') != undefined);
  // Add a checkbox to each row in the table body
  $('#' + view.key + '.kn-table tbody tr').each(function() {
    $(this).prepend('<td><input type="checkbox"></td>');
// Add checkboxes to a specific table view (view_1). Replace view_1 with your view key
$(document).on('knack-view-render.view_226', function (event, view) {
// Cycle through selected checkboxes. Use this in any code that needs to get the checked IDs
$('#view_226 tbody input[type=checkbox]:checked').each(function() {
  // add code here to get record id or row value
  var id = $(this).closest('tr').attr('id'); // record id

Checkboxes is yet another feature Knack should immediately implement (one of dozens, small and large). My work-around is to use a Yes/No field with a checkmark icon in an editable table. Then you evaluate whatever your process is on that value.