message: docs: hide codepen button until implemented
diff: </svg>
  </button>
  </li>
  - <li class="Example__Header--item">
  + <!-- <li class="Example__Header--item">
  <form
  ref="codepen"
  style="display: none;"
  />
  </svg>
  </button>
  - </li>
  + </li> -->
  <li class="Example__Header--item">
  <form
  ref="codesandbox"
  