Removing block format (like H1, H2, etc.) not working, if editor wrapper element is not of type div.

[SamReciter]

If the editor wrapper element is not of type div, the removing of block formats like H1 etc, is not working as the recognition of the surounding block container in getTopBlockContainer fails. While the traverseUp the isBlockContainer returns true for the wrapper element - traversing goes to far up - and getTopBlockContainer returns the wrapper element instead of the block element itself.
In isBlockContainer the editor div is normaly only excluded as 'div' is not contained in the blockContainerElementNames. I think you should additionally check for the editor wrapper identifier (class,id) or the contenteditable attribute or something like that instead.
Btw. awesome work - everything else is really great with this editor.

[nmielnik]

@SamReciter thanks for investigating this, I think your recommendation makes sense (we could add an additional Util.isMediumEditorElement() check inside of Util.isBlockContainer()).

Would you be interested in opening a pull request with this change? Perhaps a test case to make sure that this works for your scenario it won't be broken again in the future?

[nmielnik]

Also, just a word of advice, I know that others have run into issues when using elements other than <div>s as the editor element (you might be able to find some by searching through the issues), so even beyond this fix you might want to keep your eye out and potentially consider ways to make the editor a <div>.

[sielay]

For meantime you can use this one https://github.com/sielay/medium-editor-remove-formats I had the same problem.

Having editor as div is not a way, as div isn't always allowed element and sometimes you'd like to have up to the book html markup. Especially for WYSIWYG experience.

[vinyll]

I've also investigating on this bug for hours; having my editor within a <section> tag.
Replacing with a <div> does the job, though I need to adapt other things accordingly.

medium-editor-remove-formats did not do the job for headings in my case.