@khashi/stringer/checker.js

Convert your string

function isUpperCase(r){if("string"!=typeof r)throw new TypeError("stringer wants a string!");return r===r.toUpperCase()}function isLowerCase(r){if("string"!=typeof r)throw new TypeError("stringer wants a string!");return r===r.toLowerCase()}module.exports={isUpperCase:isUpperCase,isLowerCase:isLowerCase};