cljs.repl.browser/mime-type->encoding
(def mime-type->encoding
{"text/html" "UTF-8"
"text/css" "UTF-8"
"font/ttf" "ISO-8859-1"
"font/otf" "ISO-8859-1"
"application/pdf" "ISO-8859-1"
"image/jpeg" "ISO-8859-1"
"image/png" "ISO-8859-1"
"image/gif" "ISO-8859-1"
"image/svg+xml" "UTF-8"
"video/mp4" "ISO-8859-1"
"audio/m4a" "ISO-8859-1"
"audio/mpeg" "ISO-8859-1"
"video/mpeg" "ISO-8859-1"
"audio/wav" "ISO-8859-1"
"text/javascript" "UTF-8"
"text/x-clojure" "UTF-8"
"application/json" "UTF-8"
"application/wasm" "ISO-8859-1"})