javascript_theory DOM Event What kind of action enters the event to let the event happen hành động nào đố lọt vào sự kiện để cho sự kiện diễn ra https://www.w3schools.com/jsref/dom_obj_event.asp Javascript Basic https://flash-throat-5e1.notion.site/b3aaf848308543f786318e6c4c8edfc3?v=ce9abea4ba17421fb36a1072a561b37a&pvs=4 hackerank javascript: https://www.hackerrank.com/domains/algorithms