var $context = $(context);
var $source = $context.find('[data-drupal-date-formatter="source"]').once('dateFormat');
var $target = $context.find('[data-drupal-date-formatter="preview"]').once('dateFormat');
var $preview = $target.find('em');
var $context = $(context);
var $source = $context.find('[data-drupal-date-formatter="source"]').once('dateFormat');
var $target = $context.find('[data-drupal-date-formatter="preview"]').once('dateFormat');
var $preview = $target.find('em');