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Editing: filters.min.js

(function ($) {
  "use strict";

$('body').on('click', '.add-btn', function (e) {
    e.preventDefault();
    var mainRow = $('.main-row');
    var copy = mainRow.clone();
    copy.removeClass('main-row');
    copy.removeClass('d-none');
    var copyHtml = copy.prop('innerHTML');
    copyHtml = copyHtml.replace(/\[record\]/g, '[' + randomString() + ']');
    copy.html(copyHtml);
    $('.draggable-lists').append(copy);
  });
  $('body').on('click', '.remove-btn', function (e) {
    e.preventDefault();
    $(this).closest('.form-group').remove();
  });

function randomString() {
    var text = "";
    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

for (var i = 0; i < 16; i++) {
      text += possible.charAt(Math.floor(Math.random() * possible.length));
    }

return text;
  }

var target = $('.draggable-lists');
  setSortable(target);
})(jQuery);

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