Since version 0.19 the function node has this very useful expanded JavaScript editor feature. Is it possible to add this for ui_template node as well?
Yup, Dave and I have discussed this and it will happen. But it has to be added to the core editor of node-red first, and then dashboard updated to use it (and updated to handle it not being there if installed in an older version of nr).
Wonderful 
Is the new editor based on some project that can be integrated into another system or this is a part of the NR’s core?
The underlying editor widget we use is https://github.com/ajaxorg/ace
But this discussion is more specifically about the NR UI and how a node's edit dialog can take advantage of some of things we can do with the built-in features - specifically being able to expand a text editor to take up the full screen. It is doable today and I know @TotallyInformation has figured out how to drive the editor's APIs to do it with his ui-builder node.
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Thank you for the information!
Where can I read more about this? Is this related?
the expanded JS editor introduced in 0.19 could be extended to a more useful IDE
Hi, I've been on hols.
Have a look at the html file in the v2 branch of uibuilder. That uses the ACE editor component - it isn't that hard to do.
