Event Delegation Bugs: Events Unexpectedly Bubble or Misfire

I attached a click handler on a parent container to detect button clicks (event delegation). But sometimes clicking a button triggers multiple handlers unexpectedly—like ancestor handlers or unintended list items. How can I reliably manage this?

I attached a click handler on a parent container to detect button clicks (event delegation). But sometimes clicking a button triggers multiple handlers unexpectedly—like ancestor handlers or unintended list items. How can I reliably manage this? ✅ Answer / Explanation Event delegation leverages event bubbling, but if not managed properly, clicks can bubble to ancestors causing unintended behaviors. For example, a delete button click inside a dropdown may also trigger the parent list item's click handler.Reddit+1Reddit+1 Fixes: • Use e.stopPropagation() to prevent bubbling: js Copy code button.addEventListener('click', e => { e.stopPropagation(); // handle delete... }); • In delegated handlers, use precise target checks: js Copy code container.addEventListener('click', e => { if (e.target.matches('.btn-class')) { handleClick(); } }); • Avoid overloading a single global window listener for multiple responsibilities—it reduces separation of concerns and testability. Better to handle in scoped containers or custom events.JavaScript.info+6Reddit+6Reddit+6

🧷 Suggested Tags for Posting • Issue 1: javascript, promises, async-await, error-handling, unhandled-rejection • Issue 2: javascript, async-await, promise, concurrency, unhandled-rejection • Issue 3: javascript, event-delegation, dom-events, event-bubbling, frontend