- JavaScript API overview
https://www.drupal.org/docs/drupal-apis/javascript-api/javascript-api-o… - How to include jQuery Once on your Drupal 8 pages
https://medium.com/drupal-stories/how-to-include-jquery-once-on-your-dr… -
Understanding JavaScript behaviors in Drupal
https://www.lullabot.com/articles/understanding-javascript-behaviors-in…