ListPage.js

render () {
  return (
    <div className='w-100 flex justify-center'>
      <Link to='/create' className='fixed bg-white top-0 right-0 pa4 ttu dim black no-underline'>
        + New Post
      </Link>
      <div className='w-100' style={{ maxWidth: 400 }}>
        {this.props.viewer.allPosts.edges.map(({node}) =>
          <Post key={node.__id} post={node} />
        )}
      </div>
    </div>
  )
}