core/modules/system/css/components/js.module.css


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/**
 * @file
 * Utility classes to assist with JavaScript functionality.
 */

/**
 * For anything you want to hide on page load when JS is enabled, so
 * that you can use the JS to control visibility and avoid flicker.
 */
.js .js-hide {
  display: none;
}

/**
 * For anything you want to show on page load only when JS is enabled.
 */
.js-show {
  display: none;
}
.js .js-show {
  display: block;
}

/**
 * Use the scripting media features for modern browsers to reduce layout shifts.
 */
@media (scripting: enabled) {
  /* Extra specificity to override previous selector. */
  .js-hide.js-hide {
    display: none;
  }
  .js-show {
    display: block;
  }
}