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Mastering Event Propagation in JavaScript: Bubbling vs Capturing

  • 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.

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