Example of JavaScript generated from a bit of Elm code

generated.js

var _adamdicarlo$elm_wordy$Wordy$eligibleWord = F2(
	function (word, foundWords) {
		return !A2(_elm_lang$core$List$member, word, foundWords);
	});

var _adamdicarlo$elm_wordy$Wordy$findUnselectedLetter = F2(
	function (letters, sought) {
		var predicate = function (_p0) {
			var _p1 = _p0;
			return _elm_lang$core$Native_Utils.eq(_p1._0, sought) && (!_p1._1);
		};
		return A2(_elm_community$list_extra$List_Extra$findIndex, predicate, letters);
	});

source.elm

module Wordy exposing (main)

import List.Extra exposing (findIndex)


type Letter
    = Letter Char Bool


eligibleWord : String -> List String -> Bool
eligibleWord word foundWords =
    not (List.member word foundWords)


findUnselectedLetter : List Letter -> Char -> Maybe Int
findUnselectedLetter letters sought =
    let
        predicate (Letter ch selected) =
            ch == sought && not selected
    in
        findIndex predicate letters