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Have you ever clicked a button on a webpage and wondered how exactly that click triggers other events? Enter the world of event bubbling and capturing in JavaScript, where understanding how events propagate through the Document Object Model (DOM) can unlock a deeper level of control and interactivity in your web applications.
What are Event Bubbling and Capturing?
In simple terms, event bubbling and capturing are mechanisms that describe the order in which events are handled as they propagate through nested elements in the DOM.
Event Bubbling:
Imagine you have a button inside a div, which is inside another div. When you click the button, the click event doesn’t just trigger on the button itself. Instead, it ‘bubbles’ up through all its ancestor elements, triggering the event handlers on each one.
Event Capturing:
On the flip side, event capturing is the opposite process. Here, the event starts from the outermost ancestor element and travels down through its descendants until it reaches the target element.