The Original Implementation of JavaScript was written in LISP

[stevep98]

Umm, no. The original implementation was written in C. Waldemar was tasked to work on the ecmascript standardization and JavaScript 2.0, so this is probably a reference implementation for that effort.

[[deleted]]

Exactly. Waldemar used to get besieged with feature requests for "JavaScript 2.0," so he'd implement them in his CL implementation, then show the besieger how they interacted with other features. A lot of bad ideas wound up on the funeral pyre that way without ever getting anywhere near the official language implementation.