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Update handling-events.md (#8762)

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* Update handling-events.md

* Update handling-events.md
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Snowmanzzz(Zhengzhong Zhao)
2017-01-12 06:30:43 -08:00
committed by Dan Abramov
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@@ -138,4 +138,4 @@ class LoggingButton extends React.Component {
}
```
The problem with this syntax is that a different callback is created each time the `LoggingButton` renders. In most cases, this is fine. However, if this callback is passed as a prop to lower components, those components might do an extra re-rendering. We generally recommend binding in the constructor to avoid this sort of performance problem.
The problem with this syntax is that a different callback is created each time the `LoggingButton` renders. In most cases, this is fine. However, if this callback is passed as a prop to lower components, those components might do an extra re-rendering. We generally recommend binding in the constructor or using the property initializer syntax, to avoid this sort of performance problem.