When should you use event delegation vs individual listeners?
Use delegation for many similar items (lists, tables), dynamically added elements, and when memory is a concern. Use individual listeners for few items (< 10), items with different handlers, and when the parent has many non-relevant children.
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More FAQs in Event Delegation vs Individual Listeners
Every click on the parent triggers the handler (even clicks on non-relevant areas), slightly less direct than individual listeners, and requires checking e.target on every click. For few items, individual listeners are simpler.
For more than 20-50 items, consider delegation. Each listener consumes memory. 100 individual listeners is wasteful when one delegation listener can handle all of them.
Yes. Since the listener is on the parent (which already exists), new children's clicks bubble to the same parent listener. No need to add new listeners for new elements. This is a key advantage of delegation.
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