gist.js

import React from 'react';
import Gist from 'super-react-gist';

const Preview = ({value : {url}}) => {
  if(!url) return null;
  return   <div style={{height: "100px", overflowY: 'scroll'}}><Gist url={url} /></div>
}

export default {
  name: 'gist',
  type: 'object',
  title: 'Gist Embed',
  fields: [
    {
      name: 'url',
      type: 'url',
      title: 'Gist Url'
    }
  ],
  preview: {
    select: {
      url: 'url'
    },
    component: Preview
  }
}