Drupal javascript events on AJAX modal Link https://freelance-drupal.com/en/blog/drupal-javascript-events-on-ajax-modal How to trigger events related to ajax modal dialogs.
Dialog Modal Pattern Link https://www.w3.org/WAI/ARIA/apg/patterns/dialog-modal/ WCAG accessibility guidance for dialog pattern.
4.11.4 The dialog element Link https://html.spec.whatwg.org/multipage/interactive-elements.html#the-dialog-ele… HTML spec for dialog element.