In the cljs slack channel (which you should join), someone asked if there is a cljs library for humanizing text. I pointed them to a new (to cljs) feature that’s already available via cljs.pprint: cl-format. (Note that this also applies to clj as it already supported pretty-printing thanks to Tom Faulhaber et al).
cl-format is a cljs version of Common Lisp’s FORMAT function. It provides a ton of functionality, so much so that there’s a full pdf describing it. For a gentler, yet still expansive description, check out a few FORMAT recipes.
apnumber - For numbers 1-9, returns the number spelled out. Otherwise, returns the number. This follows Associated Press style.
intcomma - Converts an integer to a string containing commas every three digits.
intword - Converts a large integer to a friendly text representation.
capitalize - Capitalizes the first letter in a string, downcasing the tail.
capitalizeAll - Capitalize the first letter of every word in a string.
cl-format also provides support for pluralization, conditional formatting, and a whole host of other things. The pluralization only supports simple cases of adding “s” and “y” => “ies” and all printing is based on English, so it’s not useful in every case. But it’s very nice to have and it’s only a simple (require 'cljs.pprint) away.