“DOM & Events” in Information Technology

12 questions across 1 technology.

Information Technology

12 questions in 1 technology

#	Question	Technology	Topic	Level
1	How do you create and dispatch a custom DOM event? JavaScript › DOM & Events	JavaScript	DOM & Events	Intermediate
2	How does MutationObserver let you react to DOM changes made by other code? JavaScript › DOM & Events	JavaScript	DOM & Events	Advanced
3	What is event bubbling? JavaScript › DOM & Events	JavaScript	DOM & Events	Beginner
4	What does event.preventDefault() do? JavaScript › DOM & Events	JavaScript	DOM & Events	Beginner
5	How do you select and modify an element's text content? JavaScript › DOM & Events	JavaScript	DOM & Events	Beginner
6	What is event delegation and why is it a performance best practice? JavaScript › DOM & Events	JavaScript	DOM & Events	Intermediate
7	What's the difference between event.target and event.currentTarget? JavaScript › DOM & Events	JavaScript	DOM & Events	Intermediate
8	What's the difference between the capturing and bubbling phases of event propagation? JavaScript › DOM & Events	JavaScript	DOM & Events	Advanced
9	How do you properly clean up event listeners to avoid memory leaks? JavaScript › DOM & Events	JavaScript	DOM & Events	Advanced
10	What is the difference between passive and non-passive event listeners for scroll performance? JavaScript › DOM & Events	JavaScript	DOM & Events	Advanced
11	What is the storage event and when does it fire? JavaScript › Browser Storage & Web APIs	JavaScript	Browser Storage & Web APIs	Intermediate
12	How can an unremoved event listener cause a memory leak? JavaScript › Memory Management & Garbage Collection	JavaScript	Memory Management & Garbage Collection	Intermediate