off()

Removes a subscription to an event type. The specified handler will no longer be called when the event occurs.

Syntax

instance.off(eventName, handler);

Parameters

eventName

required

The name of the event to unsubscribe from.

handler

function

required

The specific callback function to remove. Must be the same function reference that was used with on() or once().

Returns

void

Returns a void operator.

Examples

The following examples show different ways to unsubscribe from events:

// Define a handler
function receiveHandler(event, instance) {
    console.log('Message received:', event);
}

// Subscribe to event
instance.on('receive', receiveHandler);

// Later, unsubscribe from event
instance.off('receive', receiveHandler);

// Unsubscribe after first use
instance.on('receive', (event, instance) => {
    console.log('Received:', event);
    instance.off('receive', receiveHandler);
});

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Syntax

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Examples