nodejs
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‎doc/api/events.markdown‎
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@@ -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();
@@ -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) => {