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https://github.com/react-grid-layout/react-resizable

A simple React component that is resizable with a handle.
https://github.com/react-grid-layout/react-resizable

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A simple React component that is resizable with a handle.

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README

        

### React-Resizable

[View the Demo](https://react-grid-layout.github.io/react-resizable/index.html)

A simple widget that can be resized via one or more handles.

You can either use the `` element directly, or use the much simpler `` element.

See the example and associated code in [ExampleLayout](/examples/ExampleLayout.js) and
[ResizableBox](/lib/ResizableBox.js) for more details.

Make sure you use the associated styles in [/css/styles.css](/css/styles.css), as without them, you will have
problems with handle placement and visibility.

You can pass options directly to the underlying `DraggableCore` instance by using the prop `draggableOpts`.
See the [demo](/examples/TestLayout.js) for more on this.

### Installation

$ npm install --save react-resizable

### Compatibility

[React-Resizable 3.x](/CHANGELOG.md#3.0.0) is compatible with React `>= 16.3`.
React-Resizable 2.x has been skipped.
[React-Resizable 1.x](/CHANGELOG.md#1.11.1) is compatible with React `14-17`.

### Usage

This package has two major exports:

* [``](/lib/Resizable.js): A raw component that does not have state. Use as a building block for larger components, by listening to its
callbacks and setting its props.
* [``](/lib/ResizableBox.js): A simple `

` element that manages basic state. Convenient for simple use-cases.

#### ``
```js
const {Resizable} = require('react-resizable');

// ES6
import { Resizable } from 'react-resizable';

// ...
class Example extends React.Component {
state = {
width: 200,
height: 200,
};

// On top layout
onResize = (event, {node, size, handle}) => {
this.setState({width: size.width, height: size.height});
};

render() {
return (


Contents


);
}
}

```

#### ``
```js
const {ResizableBox} = require('react-resizable');

// ES6
import { ResizableBox } from 'react-resizable';

class Example extends React.Component {
render() {
return (

Contents

);
}
}
```

### Props

These props apply to both `` and ``. Unknown props that are not in the list below will be passed to the child component.

```js
type ResizeCallbackData = {
node: HTMLElement,
size: {width: number, height: number},
handle: ResizeHandleAxis
};
type ResizeHandleAxis = 's' | 'w' | 'e' | 'n' | 'sw' | 'nw' | 'se' | 'ne';

type ResizableProps =
{
children: React.Element,
width: number,
height: number,
// Either a ReactElement to be used as handle, or a function returning an element that is fed the handle's location as its first argument.
handle: ReactElement | (resizeHandle: ResizeHandleAxis, ref: ReactRef) => ReactElement,
// If you change this, be sure to update your css
handleSize: [number, number] = [10, 10],
lockAspectRatio: boolean = false,
axis: 'both' | 'x' | 'y' | 'none' = 'both',
minConstraints: [number, number] = [10, 10],
maxConstraints: [number, number] = [Infinity, Infinity],
onResizeStop?: ?(e: SyntheticEvent, data: ResizeCallbackData) => any,
onResizeStart?: ?(e: SyntheticEvent, data: ResizeCallbackData) => any,
onResize?: ?(e: SyntheticEvent, data: ResizeCallbackData) => any,
draggableOpts?: ?Object,
resizeHandles?: ?Array = ['se']
};
```

The following props can also be used on ``:

```js
{
style?: Object // styles the returned


}
```

If a `width` or `height` is passed to ``'s `style` prop, it will be ignored as it is required for internal function.

#### Resize Handle

If you override the resize handle, we expect that any `ref` passed to your new handle with represent the underlying DOM element.

This is required, as `react-resizable` must be able to access the underlying DOM node to attach handlers and measure position deltas.

There are a few ways to do this:

##### Native DOM Element

This requires no special treatment.

```js
} />
```

##### Custom React Component

You must [forward the ref](https://reactjs.org/docs/forwarding-refs.html) and props to the underlying DOM element.

###### Class Components

```js
class MyHandleComponent extends React.Component {
render() {
const {handleAxis, innerRef, ...props} = this.props;
return


}
}
const MyHandle = React.forwardRef((props, ref) => );

} />
```

###### Functional Components

```js
const MyHandle = React.forwardRef((props, ref) => {
const {handleAxis, ...restProps} = props;
return

;
});

} />
```

##### Custom Function

You can define a function as a handle, which will simply receive an axis (see above `ResizeHandleAxis` type) and ref. This may be more clear to read, depending on your coding style.

```js
const MyHandle = (props) => {
return

;
};

} />
```