core/modules/comment/js/comment-by-viewer.js


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/**
 * @file
 * Attaches behaviors for the Comment module's "by-viewer" class.
 */

(function ($, Drupal, drupalSettings) {
  /**
   * Add 'by-viewer' class to comments written by the current user.
   *
   * @type {Drupal~behavior}
   */
  Drupal.behaviors.commentByViewer = {
    attach(context) {
      const currentUserID = parseInt(drupalSettings.user.uid, 10);
      $('[data-comment-user-id]')
        .filter(function () {
          return (
            parseInt(this.getAttribute('data-comment-user-id'), 10) ===
            currentUserID
          );
        })
        .addClass('by-viewer');
    },
  };
})(jQuery, Drupal, drupalSettings);