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There's JSCL [1], an implementation of Common Lisp in JS. It's not a full implementation but you would be able to use some CL libraries, I guess.

I'll have a look. There is also

(ps:import-macros-from-lisp 'rutils:aif)

in Parenscript which lets one import macros from CL.

Cool. But I wouldn't expect import-macros-from-lisp to work with many existing CL macros. Parenscript is quite mechanical in its transpiling to JS.