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doc: add note about removeListener order #23762

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doc: add note about removeListener order #23762

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20 changes: 20 additions & 0 deletions doc/api/events.md
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Expand Up @@ -581,6 +581,26 @@ being removed. This will not impact the order in which listeners are called,
but it means that any copies of the listener array as returned by
the `emitter.listeners()` method will need to be recreated.

When a single function has been added as a handler multiple times for a single
event (as in the example below), `removeListener()` will remove the most
recently added instance. In the example the `once('ping')`
listener is removed:

```js
const ee = new EventEmitter();

function pong() {
console.log('pong');
}

ee.on('ping', pong);
ee.once('ping', pong);
ee.removeListener('ping', pong);

ee.emit('ping');
ee.emit('ping');
```

Returns a reference to the `EventEmitter`, so that calls can be chained.

### emitter.setMaxListeners(n)
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