Event Delegation

What performance optimization does this implement?

function debounceDelegate(element, eventType, selector, handler, delay) {
  let timeoutId;
  element.addEventListener(eventType, e => {
    const target = e.target.closest(selector);
    if (!target) return;
    
    clearTimeout(timeoutId);
    timeoutId = setTimeout(() => {
      handler.call(target, e);
    }, delay);
  });
}

Event caching
Listener reduction
Debounced delegation
This implements debouncing combined with event delegation, optimizing performance for frequent events. Benefits include: 1) Reduced handler execution frequency for high-frequency events, 2) Maintained delegation efficiency, 3) Proper handling of this context in debounced calls, 4) Memory efficiency through single listener usage, 5) Flexible targeting through selector parameter. This pattern is particularly useful for handling window resize, scroll, input, or other frequent events that need delegation.
Event filtering

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