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Nov 1, 2017
Merged

Switching to a more popular representation of optional arguments #228

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4 changes: 2 additions & 2 deletions content/docs/reference-react-component.md
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Original file line number Diff line number Diff line change
Expand Up @@ -291,7 +291,7 @@ For more details, see [*Error Handling in React 16*](/blog/2017/07/26/error-hand
### `setState()`

```javascript
setState(updater, [callback])
setState(updater[, callback])
```

`setState()` enqueues changes to the component state and tells React that this component and its children need to be re-rendered with the updated state. This is the primary method you use to update the user interface in response to event handlers and server responses.
Expand Down Expand Up @@ -323,7 +323,7 @@ The second parameter to `setState()` is an optional callback function that will
You may optionally pass an object as the first argument to `setState()` instead of a function:

```javascript
setState(stateChange, [callback])
setState(stateChange[, callback])
```

This performs a shallow merge of `stateChange` into the new state, e.g., to adjust a shopping cart item quantity:
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12 changes: 2 additions & 10 deletions content/docs/reference-react-dom.md
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Expand Up @@ -33,11 +33,7 @@ React supports all popular browsers, including Internet Explorer 9 and above.
### `render()`

```javascript
ReactDOM.render(
element,
container,
[callback]
)
ReactDOM.render(element, container[, callback])
```

Render a React element into the DOM in the supplied `container` and return a [reference](/docs/more-about-refs.html) to the component (or returns `null` for [stateless components](/docs/components-and-props.html#functional-and-class-components)).
Expand All @@ -63,11 +59,7 @@ If the optional callback is provided, it will be executed after the component is
### `hydrate()`

```javascript
ReactDOM.hydrate(
element,
container,
[callback]
)
ReactDOM.hydrate(element, container[, callback])
```

Same as [`render()`](#render), but is used to hydrate a container whose HTML contents were rendered by [`ReactDOMServer`](/docs/react-dom-server.html). React will attempt to attach event listeners to the existing markup.
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