It looks like back in time nice collaboration has happened between Ace, CodeMirror resulting in common JS Syntax Highlighting Specification:

Followed by a blog post:
Implementation from CodeMirror:
And (almost compliant?) implementation on Ace:

Unfortunately since than each editor did it's own thing and modes written for
one still can be consumed by other. Also new and interesting syntax highlighters have appeared that could have taken advantage of that specification and existing modes but they did not.

Any chances we you could see a renascence ? What about setting up a repository with language modes that both editors could take advantage of ?
Maybe we also could standardizing CSS classnames used so that color schemes can be portable across these projects ?

Also projects like +Eclipse Orion could join this effort.
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