Page Embed plugin

<textarea id="page-embed">
  <p><img style="display: block; margin-left: auto; margin-right: auto;" title="Tiny Logo" src="https://www.tiny.cloud/docs/images/logos/android-chrome-256x256.png" alt="TinyMCE Logo" width="128" height="128" /></p>

  <h2 style="text-align: center;">Welcome to the TinyMCE editor demo!</h2>

  <h2>Got questions or need help?</h2>

  <ul>
    <li>Our <a href="https://www.tiny.cloud/docs/">documentation</a> is a great resource for learning how to configure TinyMCE.</li>
    <li>Have a specific question? Try the <a href="https://stackoverflow.com/questions/tagged/tinymce" target="_blank" rel="noopener"><code>tinymce</code> tag at Stack Overflow</a>.</li>
    <li>We also offer enterprise grade support as part of <a href="https://www.tiny.cloud/pricing">TinyMCE premium plans</a>.</li>
  </ul>

  <h2>A simple table to play with</h2>

  <table style="border-collapse: collapse; width: 100%;" border="1">
    <thead>
      <tr>
        <th>Product</th>
        <th>Cost</th>
        <th>Really?</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td>TinyMCE</td>
        <td>Free</td>
        <td>YES!</td>
      </tr>
      <tr>
        <td>Plupload</td>
        <td>Free</td>
        <td>YES!</td>
      </tr>
    </tbody>
  </table>

  <h2>Found a bug?</h2>

  <p>
    If you think you have found a bug please create an issue on the <a href="https://github.com/tinymce/tinymce/issues">GitHub repo</a> to report it to the developers.
  </p>

  <h2>Finally ...</h2>

  <p>
    Don't forget to check out our other product <a href="http://www.plupload.com" target="_blank">Plupload</a>, your ultimate upload solution featuring HTML5 upload support.
  </p>
  <p>
    Thanks for supporting TinyMCE! We hope it helps you and your users create great content.<br>All the best from the TinyMCE team.
  </p>
</textarea>

.tiny-pageembed--21by9,
.tiny-pageembed--16by9,
.tiny-pageembed--4by3,
.tiny-pageembed--1by1 {
  display: block;
  overflow: hidden;
  padding: 0;
  position: relative;
  width: 100%;
}

.tiny-pageembed--21by9::before,
.tiny-pageembed--16by9::before,
.tiny-pageembed--4by3::before,
.tiny-pageembed--1by1::before {
  content: "";
  display: block;
}

.tiny-pageembed--21by9::before {
  padding-top: 42.857143%;
}

.tiny-pageembed--16by9::before {
  padding-top: 56.25%;
}

.tiny-pageembed--4by3::before {
  padding-top: 75%;
}

.tiny-pageembed--1by1::before {
  padding-top: 100%;
}

.tiny-pageembed--21by9 iframe,
.tiny-pageembed--16by9 iframe,
.tiny-pageembed--4by3 iframe,
.tiny-pageembed--1by1 iframe {
  border: 0;
  height: 100%;
  left: 0;
  position: absolute;
  top: 0;
  width: 100%;
}

tinymce.init({
  selector: 'textarea#page-embed',
  plugins: 'pageembed code preview',
  toolbar: 'pageembed code preview',
  menubar: 'view',
  tiny_pageembed_classes: [
    { text: 'Big embed', value: 'my-big-class' },
    { text: 'Small embed', value: 'my-small-class' }
  ],
  height: 500,
  content_style: 'body { font-family:Helvetica,Arial,sans-serif; font-size:14px }'
});