I have written a plugin which implements a widget allowing Eve (http://witheve.com/) programs to be embedded in TiddlyWiki.
An Eve program is valid markdown syntax with the actual code stored in markdown code blocks. While the TiddlyWiki wiki syntax is not markdown, the code block syntax is compatible. This means Eve programs can be stored in tiddlers using the wiki syntax. See https://btheado.github.io/tweve/ for explanation and demo. See https://github.com/btheado/tweve for the source code. There was a discussion about Eve here over a year ago: https://groups.google.com/d/msg/tiddlywiki/cRsdY_h-YHQ/WjT1SWWzGQAJ -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/CAO5X8CwHJ_YVZSBtySGfDoSBe%3DF3w9kXQ%3DRhrUwOUSK-ocpcvw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.

