As you are the third person asking about this in about a week, I wrote a blog post about the "issue".
https://dnncommunity.org/blogs/Post/2841

HTH Timo

Thanks for the reply, but its still not working, i have tried with AllowedContent set to true and also false, and with ExtraAllowedContent set to *[*];

My test is to click on [Source] enter the simply div command with an id, then click on Source again, then Source again and the div code as vanished.

I just tested this using:

extraAllowedContent = div(*);div{*}

And this HTML and it seems to work ok.

< div class="test">test < /div>
< div id="test">test < /div>

< div id="ab" >test < /div > does work

but
< div id="ab" > < /div > doesn't
nor does
< div id="ab" >   < /div>

I would have expected Allowedcontent = true to allow any entry and not do any formatting.

Currently i have some modules whose content is

< div id="ab" > < /div >

as these are populated by javascript, with this cuurent formatting option, i will need to change back to radeditor so that i can amend them prior to switching to ckeditor, otherwise i will lose the content.

Ok, that's another issue, that's empty tag stripping.

I think you need an extra cofiuration for that along this line: https://ckeditor.com/old/...tags#forum-topic-top

I'll try that later today and see if I can get it to work.

BTW:
I would strongly advise you to not use the editor for these kind of scenarios.
I don't know exactly what you are trying to accomplish, but inserting empty DIV elements is much easier en better to manage using a  structured content module like Open Content (or 2SXC). You can post what you want to do on the dicussions tab and we'll help determine if it feasable to use OC and to get you started.

The div is used to insert a ClickDimensions form as a widget, example

< div pageID="4q5bzpfeeipaaaisazzzz" > < /div >

Possible Solution - Use Chrome

Hi,
I know this is an old thread but just in case someone else is still looking for a (different) solution...

I had the same problem: HTML tags were stripped from my code in the editor (but they were still processed and to be found in the db, table "HtmlText"). I followed any suggestion I could find in these forums (in HTML Editor Manager, setting AllowedContent to true and/or changing the config files and/or removing other modules from the pages that may interfere, logging in as superuser vs siteadmin)... nothing helped.
The solution I found (after approx. 12 hours of frustrating research and trial and error) was as simple as this: When correctly setting AllowedContent to true, Firefox and Internet Explorer both continue to strip the tags. Only Chrome displays the tags (I haven't tried out Edge).

Hope that may help someone.
Britta

Well that's very strange, as I'm using this with Firefox and it works as expected (see the previousy mentioned blog post about CkEditor stripping HTML)

Timo,

thanks for your feedback and also for your blog post that I had read and followed before.

This is indeed strange that it works for you in Firefox but it doesn't for me. So there must be something else going wrong in my DNN website. Until I find out what that is, I am just happy that I was able to upgrade to 9.9.0 and remove Telerik - even if that means that for right now, I can only use Chrome for the handful of modules where I do use HTML tags that would otherwise be stripped.

Best, Britta