Speculative + Expound in Klipse

init.cljs

(require '[cljs.spec.alpha :as s])
(require '[cljs.spec.test.alpha :as stest])
(require '[expound.alpha :as expound])
(require '[speculative.instrument :refer [instrument]])
(require '[clojure.string :as str])
(defonce instrument-fns
  (do (set! s/*explain-out* (expound/custom-printer
                              {:show-valid-values? true}))
    (eval (cons 'do (for [sym speculative.impl.syms/instrumentable-syms-cljs]
                      `(stest/instrument-1 [:quote ~sym]))))))
 
(try
  ;; insert your call here
  ;; choose of the functions listed in the bottom left quadrant
  (subs "foo" -1)
  (catch :default e
    (println e)))

speculative.impl.syms/instrumentable-syms-cljs