Welcome to JSCL (version 4d7e110 built on 5 May 2023)
JSCL is a Common Lisp implementation on Javascript.
For more information, visit the project page at [GitHub](https://github.com/jscl-project/jscl).
CL-USER> (bit-vector-p (make-array 6
... :element-type 'bit
... :fill-pointer t))
ERROR: Function 'BIT-VECTOR-P' undefined
CL-USER>
http://clhs.lisp.se/Body/f_bt_vec.htm#bit-vector-p