document-visibility 

> Handle changes to browser document visibility using the Page Visibility API

Install

``
$ npm install --save document-visibility
`

Usage

`js
var Visibility = require('document-visibility')
var visibility = Visibility()

visibility.visible()
//=> true/false

visibility.onChange(function (visible) {
//=> true/false
})
`

API

#### visibility.visible() -> boolean

Returns the visibility of the document. If the browser does not support the visibility API, this will always be true.

#### visibility.onChange(fn) -> function

Returns an unlisten function.

##### fn

Required
Type: function
Arguments: visible`

A function to call when the page visibility changes.

License

MIT © Ben Drucker