## React View Pager (Prerelease)

[![Dependency Status](https://david-dm.org/souporserious/react-view-pager.svg)](https://david-dm.org/souporserious/react-view-pager)

View-Pager/Slider/Carousel powered by React Motion.

![react-motion-slider](example/images/react-view-pager.gif)

## Note before using

Use at your own risk, API's are subject to change. It's been fairly stable these last few months, but still might change slightly. Once the outstanding issues are fixed I will release 1.0.0.

## Usage

`yarn add react-view-pager`

`npm install react-view-pager --save`

```html
<script src="https://unpkg.com/react-view-pager/dist/react-view-pager.js"></script>
(UMD library exposed as `ReactViewPager`)
```

## Example
```js
import { ViewPager, Frame, Track, View } from 'react-view-pager'

<ViewPager tag="main">
  <Frame className="frame">
    <Track
      ref={c => this.track = c}
      viewsToShow={2}
      infinite
      className="track"
    >
      <View className="view">1</View>
      <View className="view">2</View>
      <View className="view">3</View>
      <View className="view">4</View>
    </Track>
  </Frame>
  <nav className="pager-controls">
    <a
      className="pager-control pager-control--prev"
      onClick={() => this.track.prev()}
    >
      Prev
    </a>
    <a
      className="pager-control pager-control--next"
      onClick={() => this.track.next()}
    >
      Next
    </a>
  </nav>
</ViewPager>
```

## `ViewPager` Props

### `tag`: PropTypes.string
The HTML tag for this element. Defaults to `div`.

## `Frame` Props

### `tag`: PropTypes.string
The HTML tag for this element. Defaults to `div`.

### `autoSize`: PropTypes.oneOf([true, false, 'width', 'height'])

Animates the wrapper's width and/or height to fit the current view. Defaults to `false`.

### `accessibility`: PropTypes.bool

Enable tabbing and keyboard navigation.

### `springConfig`: React.PropTypes.objectOf(React.PropTypes.number)

Accepts a [React Motion spring config](https://github.com/chenglou/react-motion#--spring-val-number-config-springhelperconfig--opaqueconfig).

## `Track` Props

### `tag`: PropTypes.string
The HTML tag for this element. Defaults to `div`.

### `currentView`: PropTypes.any

Specify the index or key of a view to move to that view. Use with `onViewChange` to control the state of the pager.

### `viewsToShow`: PropTypes.oneOfType([PropTypes.number, PropTypes.oneOf(['auto'])])

The number of views visible in the frame at one time. Defaults to `1`. Use `auto` to respect the views's natural or defined dimensions.

### `viewsToMove`: PropTypes.number

The number of views to move upon using `prev` and `next` methods. Defaults to `1`.

### `align`: PropTypes.number

Pass any number to offset the view from the start of the track. For example, `0` aligns to the start of the track, `0.5` to the center, and `1` aligns to the end.

### `contain`: PropTypes.bool

Prevents empty space from showing in frame. Defaults to `false`.

### `infinite`: PropTypes.bool

Prepare your pager for intergalactic space travel. Allows the track to wrap to the beginning/end when moving to a view. To infinity and beyond!

### `instant`: PropTypes.bool

Move to a view instantly without any animation. This will control the internal `instant` state inside of the component.

### `axis`: PropTypes.oneOf(['x', 'y'])

Which axis the track moves on. Defaults to `x`.

### `animations`: PropTypes.array

Define a limitless array of animation stops. Each object in the array requires a `prop` and `stops` property along with an optional `unit` property.

```js
// scale and fade views as they enter and leave
const animations = [{
  prop: 'scale',
  stops: [
    [-200, 0.85],
    [0, 1],
    [200, 0.85]
  ]
}, {
  prop: 'opacity',
  stops: [
    [-200, 0.15],
    [0, 1],
    [200, 0.15]
  ]
}]
```

### `swipe`: PropTypes.oneOf([true, false, 'touch', 'mouse'])

Enable touch and/or mouse dragging. Defaults to `true`.

### `swipeThreshold`: PropTypes.number

The amount the user must swipe to advance views. `(frameWidth * swipeThreshold)`. Defaults  to `0.5`.

### `flickTimeout`: PropTypes.number

The amount of time in milliseconds that determines if a swipe was a flick or not.

### `rightToLeft`: PropTypes.bool (Coming Soon)

### `lazyLoad`: PropTypes.bool (Coming Soon)

### `springConfig`: React.PropTypes.objectOf(React.PropTypes.number)

Accepts a [React Motion spring config](https://github.com/chenglou/react-motion#--spring-val-number-config-springhelperconfig--opaqueconfig).

### `onSwipeStart`: PropTypes.func

Prop callback fired before swipe.

### `onSwipeMove`: PropTypes.func

Prop callback fired during swipe.

### `onSwipeEnd`: PropTypes.func

Prop callback fired after swipe.

### `onScroll`: PropTypes.func

Prop callback fired when track is scrolling. Useful for parallax or progress bars.

### `onViewChange`: PropTypes.func

Prop callback fired when view changes. Passes back the newly selected indicies.

### `onRest`: PropTypes.func

Prop callback fired after track scrolling animation settles.

### Public methods
### `prev`

Moves to the previous view.

### `next`

Advances to the next view.

### `scrollTo`

Scroll to a view by it's index or key.

## `View` Props

### `tag`: PropTypes.string
The HTML tag for this element. Defaults to `div`.

## Running Locally

clone repo

`git clone git@github.com:souporserious/react-view-pager.git`

move into folder

`cd ~/react-view-pager`

install dependencies

`npm install`

run dev mode

`npm run dev`

open your browser and visit: `http://localhost:8080/`