## PeerJs + JSON Example
Here, I will give a short overview on how to enable collaborative json with the
[PeerJs](http://peerjs.com/) Connector and the Json Framework. Open
[index.html](http://dadamonad.github.io/Yatta/examples/PeerJs-Json/index.html) in your Browser and
use the console to explore Yatta!

[PeerJs](http://peerjs.com) is a Framework that enables you to connect to other peers. You just need the
user-id of the peer (browser/client). And then you can connect to it.

First you have to include the following libraries in your html file:
```
<script src="http://cdn.peerjs.com/0.3/peer.js"></script>
<script src="../../build/browser/Frameworks/XmlFramework.js"></script>
<script src="../../build/browser/Connectors/PeerJsConnector.js"></script>
<script src="./index.js"></script>
```
### Create Connector

The PeerJs Framework requires an API key, or you need to set up your own PeerJs server.
Get an API key from the [Website](http://peerjs.com/peerserver).
The first parameter of `createPeerJsConnector` is forwarded as the options object in PeerJs.
Therefore, you may also specify the server/port here, if you have set up your own server.


```js
var yatta, yattaHandler;
```


This will connect to the server owned by the peerjs team.
For now, you can use my API key.


```js
var conn = {key: 'h7nlefbgavh1tt9'};
```


This will connect to one of my peerjs instances.
I can't guaranty that this will be always up. This is why you should use the previous method with the api key,
or set up your own server.


```js
/*var conn = {
  host: "terrific-peerjs.herokuapp.com",
  port: "", // this works because heroku can forward to the right port.
  // debug: true,
};*/
var rid = Math.floor(Math.random()*100 + 1)

Y.createPeerJsConnector(rid, conn, function(Connector, user_id){

  yatta = new Y.XmlFramework(user_id, Connector);
```


Get the url of this frame. If it has a url-encoded parameter
we will connect to the foreign peer.


```js
    var url = window.location.href;
    var peer_id = location.search
    var url = url.substring(0,-peer_id.length);
    peer_id = peer_id.substring(1);
```


Set the shareable link.


```js
    document.getElementById("peer_link").setAttribute("href",url+"?"+user_id);
```


Connect to other peer.


```js
    if (peer_id.length > 0){
      yatta.connector.connectToPeer(peer_id);
    }
    yatta.connector.onNewConnection(function(){
      $("#collaborative").replaceWith(yatta.val())
    });

    yatta.val($("#collaborative")[0])
    console.log(yatta.getUserId());

});
```