$ npm install gitbook-plugin-jsfiddle --save

{
    "plugins": [ "jsfiddle"],
    "pluginsConfig": {
          "jsfiddle":{
            "type":"script",
            "tabs":["result","js","css", "html"],
            "height": "500",
            "width": "500",
            "fontColor": "00FF00"
          }
    }
}

Param type can be 'frame' or 'script'.

Also you can use other params.

If you need to override setting for certain fiddle, you can just add this param in hash https://jsfiddle.net/4o4z6fqn/9/#fontColor=00FF00&type=frame

[source code](https://jsfiddle.net/4o4z6fqn/9/)

will be rendered like my book does.

Also you can see simple example in https://github.com/Mavrin/gitbook-example