digital_signage_framework-2.3.x-dev/js/content.js

(function ($, Drupal, drupalSettings) {
  Drupal.digital_signage_content = Drupal.digital_signage_content || {};

  Drupal.behaviors.digital_signage_content = {
    attach() {
      $('.fittext:not(.digital-signage-content-processed)')
        .addClass('digital-signage-content-processed')
        .each(function () {
          $(this).css(
            'font-size',
            (10 * $(this).parent().width()) / $(this).width(),
          );
        });
    },
  };
})(jQuery, Drupal, drupalSettings);