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Merge pull request #4684 from lyip1992/patch-3

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Update 10.1-animation.md
(cherry picked from commit 27e5a563db)
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Paul O’Shannessy
2015-08-25 09:56:13 -07:00
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@@ -54,7 +54,7 @@ var TodoList = React.createClass({
```
> Note:
>
> You must provide [the `key` attribute](/react/docs/multiple-components.html#dynamic-children) for all children of `ReactCSSTransitionGroup`, even if rendering a single item. This is how React will determine which children have entered, left, or stayed.
> You must provide [the `key` attribute](/react/docs/multiple-components.html#dynamic-children) for all children of `ReactCSSTransitionGroup`, even when only rendering a single item. This is how React will determine which children have entered, left, or stayed.
In this component, when a new item is added to `ReactCSSTransitionGroup` it will get the `example-enter` CSS class and the `example-enter-active` CSS class added in the next tick. This is a convention based on the `transitionName` prop.