Scrollin
**Do something great when an element enters the viewport.**
### Install
npm i scrollin
bower i scrollin
### Use
```js
Scrollin.track(document.querySelector('#hi'), () => alert('hi!'))
```
#### Options
You can specify optional offset params to control when an elements is considered in the "viewport".
```js
Scrollin.track(document.querySelector('#hi'), () => alert('hi!'), {
top: 10,
right: -10,
bottom: 10,
left: 10
})
```
## API
* `Scrollin.track(document.querySelector('#hi'), () => alert('hi!'))`
* `Scrollin.track(document.querySelectorAll('.hi'), () => alert('hi!'))`
* `Scrollin.untrackAll()`
* `Scrollin.untrack(document.querySelector('#hi'))`
* `Scrollin.checkForVisibleElements()`
* `Scrollin.getTracking()`
### Dev
* `npm i`
* `npm run dev`
#### Building
* `npm run compile`
#### Polyfill Caveats
* You may need to polyfill `window.requestAnimationFrame`
* You may need to polyfill `Array.prototype.splice`
* You may need to polyfill `Array.prototype.some`
📜
[](https://travis-ci.org/samccone/scrollin)