How do you handle empty folders in a file explorer?
Check if the folder has children before showing the expand icon and click handler: if (node.children && node.children.length > 0). Empty folders should not be clickable or show an expand icon.
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More FAQs in File Explorer Common Bugs and Fixes
Because of event bubbling. The child's click event bubbles up to the parent, triggering the parent's click handler. Fix: call e.stopPropagation() in the click handler to prevent bubbling.
Because you are not updating the icon text in the click handler. After toggling, update the icon: icon.textContent = isVisible ? closedIcon : openIcon. The icon must be updated every time the expanded state changes.
Use a scrollable container with overflow: auto so deeply nested nodes are still accessible. Consider a maximum depth with a 'show more' option. Alternatively, use lazy loading to load children on expand instead of rendering the entire tree.
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