Use jsDoc comments in front-end scripts

resources/assets/scripts/util/camelCase.js

@@ -1,4 +1,8 @@
-// the most terrible camelizer on the internet, guaranteed!
+/**
+ * the most terrible camelizer on the internet, guaranteed!
+ * @param {string} str String that isn't camel-case, e.g., CAMeL_CaSEiS-harD
+ * @return {string} String converted to camel-case, e.g., camelCaseIsHard
+ */
 export default str => `${str.charAt(0).toLowerCase()}${str.replace(/[\W_]/g, '|').split('|')
   .map(part => `${part.charAt(0).toUpperCase()}${part.slice(1)}`)
   .join('')