<ul data-eligibleForWebStory="true">Event propagation in JavaScript involves the order in which event handlers are invoked in the DOM.There are two phases of event propagation: Bubbling and Capturing.Event Bubbling is the default phase where the event moves from the target element to its ancestors.Event Capturing starts at the topmost ancestor and moves down to the target element.Example code shows event propagation using capturing and bubbling phases.Parent and child event handlers using capturing execute before the one using the bubbling phase.Bubbling is useful for parent components reacting to child actions or event delegation.Capturing is suitable for intercepting events early or preventing default actions.You can control event flow using event.stopPropagation() and event.stopImmediatePropagation().Understanding event propagation is essential for building efficient JavaScript applications.Mastering bubbling and capturing helps in debugging and designing reusable components.