ProseMirror was written by Marijn Haverbeke, who also wrote (and rewrote!) the much used [CodeMirror] editor. So the design of his "editor toolkits" are based on years of experience developing and maintaining text editors. Marijn is very responsive on all the respective discussion boards.
Depending on your design, CodeMirror may be the better choice, especially if you want "parsing." The core of CodeMirror is based on [Lezer], a custom parser designed for editors. ProseMirror is meant to be the rich text editor, but I found my TaskPaper clone was more suited for CodeMirror because it was more focused on plain text. I suppose it would be possible to combine Lezer with ProseMirror, but ProseMirror already has its own [document model].
ProseMirror was written by Marijn Haverbeke, who also wrote (and rewrote!) the much used [CodeMirror] editor. So the design of his "editor toolkits" are based on years of experience developing and maintaining text editors. Marijn is very responsive on all the respective discussion boards.
Examples, including markdown: https://prosemirror.net/examples/
Depending on your design, CodeMirror may be the better choice, especially if you want "parsing." The core of CodeMirror is based on [Lezer], a custom parser designed for editors. ProseMirror is meant to be the rich text editor, but I found my TaskPaper clone was more suited for CodeMirror because it was more focused on plain text. I suppose it would be possible to combine Lezer with ProseMirror, but ProseMirror already has its own [document model].
[CodeMirror]: https://codemirror.net/
[Lezer]: https://lezer.codemirror.net/
[document model]: https://prosemirror.net/docs/guide/#doc