How to use bignumber.js with Clojurescript's :npm-deps feature - clojurescript

Question

I've been following tutorial at https://anmonteiro.com/2017/03/requiring-node-js-modules-from-clojurescript-namespaces/ to use Clojurescript's :npm-deps feature.
Using left-pad works well, but when I tried to use bignumber.js I've hit problems.
This is from my project.clj
{:main "npm-deps-test.core"
:output-to "dev-compiled/npm-deps-test.js",
:output-dir "dev-compiled",
:target :nodejs,
:optimizations :none,
:source-map true
:npm-deps {:bignumber.js "4.0.2"
:left-pad "1.1.3"}}
This is code with output:
(ns npm-deps-test.core
(:require [left-pad]
[bignumber.js :as bignumber]))
(enable-console-print!)
(comment
(type bignumber)
; => #object[Object "function Object() { [native code] }"]
(aget bignumber "__proto__" "constructor")
; => #object[Object "function Object() { [native code] }"]
(bignumber "123")
; #object[TypeError TypeError: module$Users$matus$www$clojure_hacking$npm_deps_test$node_modules$bignumber_js$bignumber is not a function]
; => nil
(new bignumber "124")
; #object[TypeError TypeError: module$Users$matus$www$clojure_hacking$npm_deps_test$node_modules$bignumber_js$bignumber is not a constructor]
; => nil
(bignumber. "123")
; #object[TypeError TypeError: module$Users$matus$www$clojure_hacking$npm_deps_test$node_modules$bignumber_js$bignumber is not a constructor]
; => nil
(left-pad 42 5 0)
; => 00042
)
Any idea why this doesn't work as expected?
Using [org.clojure/clojurescript "1.9.671"]
[lein-figwheel "0.5.11"]

Answer 1

This works for me in the ClojureScript REPL when using [org.clojure/clojurescript "1.9.562"]
user=> (require '[bignumber.js :as BigNumber])
nil
user=> (BigNumber. "123")
#object[BigNumber 123]
user=> (-> (BigNumber. "12345678") (.toExponential))
"1.2345678e+7"
I would guess that the behaviour you're seeing could be a bug or breaking change in [org.clojure/clojurescript "1.9.671"].
Update:
This does indeed appear to be a bug that was patched today:
https://github.com/clojure/clojurescript/commit/00df4ae8a49005dbbb3ad87bf1a24e71897d74f7
I would suggest that you downgrade to an older (but recent!) version of ClojureScript e.g. [org.clojure/clojurescript "1.9.562"] until there is a new release which includes this patch.