@mnewhook Looks like it is not bundled with the released version of Planck. If you install master (see http://planck-repl.org/setup.html), you can mess with it:

cljs.user=> (require 'goog.labs.format.csv)
nil
cljs.user=> (goog.labs.format.csv/parse "a,b,c")
#js [#js ["a" "b" "c”]]

@pesterhazy See https://github.com/clojure/clojurescript/wiki/Google-Closure-Library#requiring-a-function

cljs.user=> (require 'goog.string.format)
nil
cljs.user=> (goog.string.format "%05d" 123)
“00123”

Thanks much Mike!