Collapse acf repeater rows by default

collapse-acf-repeaters.php

<?php

// Add the "Collapse by default" checkbox to the repeater field settings
add_action('acf/render_field_settings', 'add_collapse_setting_to_repeater_field', 10, 1);
function add_collapse_setting_to_repeater_field($field) {
  if ($field['type'] == 'repeater') {
    acf_render_field_setting($field, array(
      'label' => __('Collapse by default', 'text-domain'),
      'instructions' => __('Collapse all rows by default when editing.', 'text-domain'),
      'type' => 'true_false',
      'name' => 'collapse_by_default',
      'ui' => 1
    ));
  }
}

// Add the data-collapse attribute to the repeater field when it is rendered
add_filter('acf/prepare_field', 'add_data_collapse_attribute_to_repeater_field');
function add_data_collapse_attribute_to_repeater_field($field) {
  if ($field['type'] === 'repeater') {
    $field['wrapper']['data-collapse'] = isset($field['collapse_by_default']) ? $field['collapse_by_default'] : 0;
  }
  return $field;
}



add_action('acf/input/admin_footer', 'collapse_repeater_rows_on_page_load');
function collapse_repeater_rows_on_page_load() {
  ?>
  <script type="text/javascript">
    (function ($) {
      acf.addAction('ready', function () {
        $('[data-collapse="1"]').each(function () {
          $(this).find('.acf-row').each(function () {
            // If row is not collapsed and is not a clone used to create new rows
            if (!$(this).hasClass('-collapsed') && !$(this).hasClass('acf-clone')) {
              $(this).find('.acf-icon.-collapse').trigger('click');
            }
          });
        });
      });
    })(jQuery);
  </script>
  <?php
}