>Hacker Robert Morris later declared a corollary, which clarifies the set of "sufficiently complicated" programs to which the rule applies "...including Common Lisp."
This is referring to CL implementations that depend heavily on C.
Many CL implementations now are almost 100% Lisp code.
JavaScript (which is based on Scheme dialect of Lisp) is formally specified, well-developed, and fast, so quote above is outdated.
JavaScript isn't based on Scheme, it's what would have been Scheme if deadlines and marketing needs didn't make Netscape use a hacky toy language instead.
The place where JavaScript contains "an ad hoc, informally-specified, bug-ridden, slow implementation of half of Common Lisp" is Babel.
"Any sufficiently complicated C or Fortran program contains an ad hoc, informally-specified, bug-ridden, slow implementation of half of Common Lisp."
Also:
> Hacker Robert Morris later declared a corollary, which clarifies the set of "sufficiently complicated" programs to which the rule applies "...including Common Lisp."
[0] - https://en.wikipedia.org/wiki/Greenspun%27s_tenth_rule