How do you handle reply in nested comments in JavaScript?
Show an inline form (textarea) when reply is clicked. On submit, add a new comment object to the parent's children array. Re-render the children container. Use a unique ID (incrementing counter or UUID).
Verify This Answer
Cross-check this information using these trusted sources:
More FAQs in How to Build Nested Comments in an Interview
Use a tree data structure. Write a recursive render function that creates a div for each comment and recursively renders children. Add vote, reply, and collapse buttons. Use event delegation for clicks. Indent with marginLeft based on depth.
A tree: each comment is an object with id, text, votes, and children (array of comment objects). Children can have their own children, forming a tree. Render recursively.
Toggle the display of the children container: childrenContainer.style.display = isVisible ? 'none' : 'block'. Update the button text (Collapse/Expand). Use event delegation to handle the click.
Still have questions?
Browse all our FAQs or reach out to our support team