Coincidentally, I've been fiddling with a rather similar project, just as a hobbyist thing. It looks like this one is much farther along, kudos! Unfortunately from the contributions graph perhaps interest in it is dying off -- the last 10% (aka the last 90%) is always the hardest part to slog through...
I've been meaning to write up the various approaches to sexpressions+macros in JS. Mine differs from the others (and perhaps is closer to LispyScript) mostly in that it's close to JS in its names and semantics (e.g. "function" defines a function and you're still required to use a "return" statement), but then it lets you write macros to e.g. define "fn" where the return is implicit.
I've been meaning to write up the various approaches to sexpressions+macros in JS. Mine differs from the others (and perhaps is closer to LispyScript) mostly in that it's close to JS in its names and semantics (e.g. "function" defines a function and you're still required to use a "return" statement), but then it lets you write macros to e.g. define "fn" where the return is implicit.
Anyway, here's some sample code from mine (which is itself defining macros used elsewhere in the compiler): https://github.com/martine/pjs/blob/master/lib/macro.pjs