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Event Listener ↔ function to await Event & on Signal Trigger, call Event Handler

aka Listener

References​

  1. Target Phase ↔ Event handle at target; executes Callback Functions attach to Event Listener

  2. EventTarget ↔ Top-level Abstract Class Interface extends most objects with ability to receive Events or add Event Listener

  3. Event Delegation ↔ (Design Pattern) to attach Event Listener to common parent to utilize Bubbling Phase to apply Event to multiple Element

  4. Webhook ↔ Listener for Async web event, to push real-time updates to App/Backend