Q35: What is MutationObserver and when should it be used?
MutationObserver is a built-in API that provides the ability to watch for changes made to the DOM tree (child additions/removals, attribute mutations, text content modifications) asynchronously without performance polling.
Key Takeaways
- Asynchronously monitors DOM tree mutations.
- Replaces legacy performance-heavy DOM mutation events.
Knowledge Check
How are DOM mutation notifications delivered by MutationObserver?