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🏁 Release: Iteration 10 – 10th developer preview #177

Reinmar opened this Issue May 11, 2017 · 3 comments


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Reinmar commented May 11, 2017

We would like to let you know that the 10th developer preview of CKEditor 5 has just been tagged as version v0.10.0.

During this iteration, we spent a lot of time on fixing bugs and improving the user experience. We also implemented the last missing features planned for 1.0.0 alpha, reaching the feature completeness state πŸŽ‰!

You can, of course, check the updated sample and read further to learn more about the progress.

Microsoft Edge support

We reviewed the support for Edge. We were able to close the most important issues and we are happy to announce that CKEditor 5 is finally usable on Edge. However, we had to deal with a lot of instability from the Edge side which both made debugging hard and made us chase some bugfoot or another. We will be monitoring this situation and we kindly ask you to report all the issues so we can focus on real bugs.

Note: It is a known issue that only plain text is available in the clipboard. According to Microsoft, Edge 15 (only available in Windows 10 Creators Update for now) should finally enable support for all data types so we keep our fingers crossed that it will work soon without any action from our side.

The UI library

In this iteration, we put a lot of focus on the stability of contextual balloons and features which use them.

First of all, we realised that when multiple features want to display their UI in contextual balloons, those balloons should be synchronized. Therefore, we came up with a more centralized API (still reusable, though) for managing the editor balloon and refactored the link feature to use it. This allows us to reduce code duplication and get rid of ugly mutex-like code.

Based on the new utility we implemented the contextual toolbar plugin. Screencast are worth more than a thousand words, so, here you go:

may-10-2017 15-34-44

Finally, we improved the balloon positioning in various browsers (see 1, 2, 3).


A lot of work was also put into the stability of clipboard integration. In order for pasting to work well from the user point of view it is necessary to gracefully handle content which might not be allowed in certain places in the editor (see 1, 2, 3).

We also worked on better UX when pasting list items into a nested list and made sure that when copying content from CKEditor, the text/plain field of the clipboard is also set (previously, only HTML was available). This allows pasting that content into plain text editors (like code editors).

Other improvements

Among many, these are the more important improvements which landed in this version:

Image upload

During this iteration, we worked on one more feature – the image upload. It is pretty much ready at the moment, but we did not manage to squeeze a critical bug fix for it into this milestone, so it is not enabled it in the demo yet. We recorded a screencast, though, so you can see how it works:

may-10-2017 15-47-13

The image upload feature uses the upload utils which expose a handy API for managing file upload through a pluggable server adapter. We also implemented the CKFinder adapter.

Documentation is coming...

Our main goal during the next iteration is to finally publish some documentation. We will start with the minimum, knowing how much refactoring we are still planning, but we will make sure to cover topics related to architecture and implementing features. This will allow you to dive deeper into CKEditor 5.


We updated the basic CKEditor 5 sample that you can play with. Check out the developer preview of CKEditor 5 (version 0.10.0) on the CKEditor 5 page.


For the detailed list of changes go to ckeditor5@v0.10.0 where you can check each package's changelog.


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ssougnez commented Jul 12, 2017


I know that the small reaction should be enough, but I really would like to express, via this comment, how much I admire the good work you're doing. This editor promises to be absolutely awesome and I'm very grateful that you created it.

Keep up the good work, you're awesome πŸ‘


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Reinmar commented Jul 12, 2017

Thanks for the super kind words :) We're doing all we can to not disappoint you, guys. The scope of the project is huge, though, and it takes a lot of work to ensure the proper quality and features so it's great to see that it pays off :)


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pau1phi11ips commented Aug 4, 2017

Wow, psyched for the new image upload. Looks awesome!

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