Event bubbling and event capturing are two mechanisms used in JavaScript to describe the order in which events are handled by nested elements.
Event bubbling is the default event propagation mechanism in most browsers, where events are first captured by the innermost element and then propagated to outer elements.
This means that an event triggered on a child element will propagate up the DOM tree to its ancestors.
Event capturing is the opposite of event bubbling, where events are first captured by the outermost element and then propagated to inner elements.
In event capturing, an event triggered on a parent element will propagate down the DOM tree to its descendants.
Both event bubbling and event capturing are important concepts in JavaScript event handling and can be used to control the order in which event handlers are executed.
In most cases, event bubbling is more commonly used due to its simplicity and compatibility with older browsers.