const checkAll = function(event) {
  event.preventDefault();
  const $input = $(event.target).closest('.shiny-input-a11ycheckboxgroup');
  $input.find('input[type=\"checkbox\"]').prop('checked', true);
  $input.trigger('change');
  return false;
};
const clearAll = function(event) {
  event.preventDefault();
  const $input = $(event.target).closest('.shiny-input-a11ycheckboxgroup');
  $input.find('input[type=\"checkbox\"]').prop('checked', false);
  $input.trigger('change');
  return false;
};
const fileInputClick = function(event) {
  $('#' + $(event.target).data('target')).click();
}
const fileInputKeydown = function(event) {
  if (event.key == "Enter" || event.key == " ") {
    event.preventDefault();
    $('#' + $(event.target).data('target')).click();
  }
}