samples/slug/index.html

<!doctype html>
<head>
  <link href="https://static.contentful.com/app/main-62e0abc7.css" media="all" rel="stylesheet" type="text/css">
  <link href="https://static.contentful.com/app/vendor-976872d7.css" media="all" rel="stylesheet" type="text/css">
  <link href="https://contentful.github.io/ui-extensions-sdk/cf-extension.css" media="all" rel="stylesheet" type="text/css">
  <script type="text/javascript" src="https://contentful.github.io/ui-extensions-sdk/cf-extension-api.js"></script>
</head>
<div class="widget-slug-editor">
  <input id="slug" type="text" class="form-control" style="width: 98%; font-size: 14px">
  <i id="error" class="fa fa-exclamation-triangle is-slug-duplicate"></i>
  <i id="ok" class="fa fa-check-circle is-slug-unique"></i>
  <i id="loading" class="fa fa-spinner fa-spin"></i>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/es6-promise/3.0.2/es6-promise.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.10.1/lodash.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/speakingurl/7.0.0/speakingurl.min.js"></script>