HTML5 support

[Matti Järvinen]

With HTML source:

<article>
    <h1>Hi</h1>
    <p>Lipsum</p>
</article>

Current nightly produces:

<h1>Hi</h1>

<p>Lipsum</p>

Steps to reproduce:

1. Change to source view
2. Paste above HTML snippet
3. Change back to WYSIWYG
4. No more article tags

In #4556 [6988] initial HTML5 support was added. Did this work at all in any point or was it broken with ACF? core/dtd.js lists most of HTML5 elements including article.

[Jakub Ś]

When editor starts, plugins report allowed content to it. Tag article is not allowed because there is no plugin for it. What you can do is using extraAllowedContent : 'article' and then it will work. You can also disable ACF but we don't recommend that unless you want to allow your users inserting every tag into editor.

[Matti Järvinen]

Adding link to the documentation ​http://docs.ckeditor.com/#!/guide/dev_advanced_content_filter