Clojurians Log v2

I’m playing around with various core bit shift functions (e.g., bit-shift-left, bit-shift-right) and wanted to check some assumptions. It appears that with these bitwise instructions, ClojureScript is manipulating an implicit 32-bit signed quantity. For instance:

cljs.user=> (bit-shift-left 1 30)
1073741824
cljs.user=> (bit-shift-left 1 31)
-2147483648

And then the shift amount is modulo 32, so

cljs.user=> (bit-shift-left 1 32)
1
cljs.user=> (bit-shift-left 1 33)
2
cljs.user=> (bit-shift-left 1 34)
4

I can’t find this documented anywhere in the ClojureScript API docs, though. Clojure JVM uses a 64-bit field and the shift amount is modulo 64. I assume ClojureScript can’t use 64 bits because all numbers are doubles and so that would exceed the precision of a double and cause problems. Is all that correct?