/misc/drupal.js. Effects were achieved with additional aptly named files like
Shortly after the birth of Drupal Groups, the AJAX developers group began looking for agreement about which library should be used. After a few threads like this one, jQuery was identified as the best candidate, especially after active support by John Resig, the jQuery project lead, who agreed to dual-licence jQuery as GPL so it could be distributed with Drupal.
Other important benefits of jQuery:
- The core jQuery library is very small (about 15kb).
- jQuery has a clean, modular approach to plugins.
- The core library is stable, being in perpetual feature freeze from version 1.0.
jQuery is incorporated in Drupal since version 5.0 and work continues to remove dependencies on drupal.js and associated libraries.