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Vic Mercier3,276 Points
You can set a listener for an event you want to handle on a sibling of the parent of your target element, because of event delegation.true or false(Try to explain this question in other word)
Steven Parker210,934 Points
Event delegation must be handled by an ancestor element.
When you use event delegation, the listener must be set on an element that is the parent or other "ancestor" element of the one that will trigger the event.
A sibling of a parent would not be in the direct ancestry line, so it would not receive an event propagating from the element in question.