SICP is not so much about a particular language. I think there's a Clojure port of SICP somewhere, and Clojure has a good impedance match with web backends. If

SICP is not so much about a particular language. I think there's a Clojure port of SICP somewhere, and Clojure has a good impedance match with web backends. If you want an "authentic" experience, Scheme would be a good choice.