addEventListenersuccess

addEventListenersuccess is not a standard term in the core web APIs. Rather, it refers to attaching an event listener for an event named “success” using the EventTarget.addEventListener method. In practice, a success event is typically defined by a library, framework, or custom component rather than by the DOM itself. Therefore, whether a listener for “success” will fire depends on the specific API you are using and whether that API dispatches a CustomEvent or a standard event with that type.

Usage involves registering a handler for the event type 'success' on a target such as an element, a component, or the document. The listener signature receives an event object, and if the event is a CustomEvent, the payload is usually available in event.detail. For example:

- const el = document.getElementById('widget');

- el.addEventListener('success', function(e) { console.log('Operation succeeded', e.detail); });

- // elsewhere in the code

- el.dispatchEvent(new CustomEvent('success', { detail: { id: 123, value: 'ok' } }));

Because 'success' is not standardized, you should consult the specific API’s documentation to confirm that it dispatches such an event and to learn the expected event structure, propagation, and payload.

Best practices include using appropriate options such as once: true if you only need a single notification, and removing listeners when they are no longer needed to avoid leaks. Also be mindful of event names to avoid collisions and ensure compatibility with the API that emits the event.

See also: addEventListener, CustomEvent, dispatchEvent, event-driven programming.