Keep multiple browsers & devices in sync when building websites.
Browsersync is developed and maintained internally at JH
Follow @Browsersync on twitter for news & updates.
Community 
## Features
Please visit [browsersync.io](http://browsersync.io) for a full run-down of features
## Requirements
Browsersync works by injecting an asynchronous script tag (``) right after the `` tag
during initial request. In order for this to work properly the `` tag must be present. Alternatively you
can provide a custom rule for the snippet using [snippetOptions](http://www.browsersync.io/docs/options/#option-snippetOptions)
## Upgrading from 1.x to 2.x ?
Providing you haven't accessed any internal properties, everything will just work as
there are no breaking changes to the public API. Internally however, we now use an
immutable data structure for storing/retrieving options. So whereas before you could access urls like this...
```js
browserSync({server: true}, function(err, bs) {
console.log(bs.options.urls.local);
});
```
... you now access them in the following way:
```js
browserSync({server: true}, function(err, bs) {
console.log(bs.options.getIn(["urls", "local"]));
});
```
## Install and trouble shooting
[browsersync.io docs](http://browsersync.io)
## Integrations / recipes
[Browsersync recipes](https://github.com/Browsersync/recipes)
## Support
If you've found Browser-sync useful and would like to contribute to its continued development & support, please feel free to send a donation of any size - it would be greatly appreciated!
[](https://www.gittip.com/shakyshane)
[](https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=shakyshane%40gmail%2ecom&lc=US&item_name=browser%2dsync)
## Contributors
```
1294 Shane Osbourne
60 Shinnosuke Watanabe
19 Shane Daniel
13 Hugo Bessa
11 Paul Kinlan
8 shinnn
4 Matt Green
3 Jon Stevens
3 Werner van Deventer
3 Simen Bekkhus
3 Adam Lynch
3 Dave Hall
3 Marek 'saji' Augustynowicz
2 38elements
2 Piotr Kaleta
2 Eugeny Vlasenko
2 Steve Mao
2 Michael Branch
2 The Gitter Badger
2 Dan Tello
2 Olivier Combe
2 brutaldev
2 chase_chou
2 Hugo Dias
2 Paul Robertson
1 Tony Holdstock-Brown
1 Victor Fernandez de Alba
1 Yazhong Liu
1 dsc
1 mericson
1 viktor hesselbom
1 wesruv
1 Andrew Schmadel
1 Austin Pray
1 Benjamín Eidelman
1 Björn Söderqvist
1 Cameron Spear
1 Carl Henderson
1 Cedric Kastner
1 Christian Vuerings
1 Craig Morris
1 Dimitri Nicolas
1 Guillaume Lambert
1 Imran Sulemanji
1 Jason Dreyzehner
1 Jory Graham
1 Michael Leigeber
1 Naoya Kanai
1 Paul Love
1 Paul Miller
1 Peter Blazejewicz
1 Philipp Nowinski
1 Plou
1 Robert Vock
1 Stian Didriksen
1 Sylvain Emery
```
## License
Apache 2
Copyright (c) 2015 Shane Osbourne