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doc: Backport ee.once doc clarifications to 4.x. #7103

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doc: Backport ee.once doc clarifications to 4.x. #7103

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7 changes: 3 additions & 4 deletions doc/api/events.markdown
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Original file line number Diff line number Diff line change
Expand Up @@ -130,7 +130,7 @@ myEmitter.emit('event');
```

Using the `eventEmitter.once()` method, it is possible to register a listener
that is immediately unregistered after it is called.
that is unregistered before it is called.

```js
const myEmitter = new MyEmitter();
Expand Down Expand Up @@ -338,9 +338,8 @@ Returns a reference to the `EventEmitter` so calls can be chained.

### emitter.once(eventName, listener)

Adds a **one time** `listener` function for the event named `eventName`. This
listener is invoked only the next time `eventName` is triggered, after which
it is removed.
Adds a **one time** `listener` function for the event named `eventName`. The
next time `eventName` is triggered, this listener is removed and then invoked.

```js
server.once('connection', (stream) => {
Expand Down