[Password Policy Check Functions contains min, min length, special characters, numbers, upper and lower case] #JavaScript #Functional

passwordPolicyCheck.js

const minLength = (min) => (str) => (str||'').toString().trim().length >= min
const contains = (chars, min) => (str) => [...((str||'').toString().trim())].filter(char => (new Set(chars)).has(char)).length >= min
const hasLowerCase = contains('abcdefghijklmnopqrstuvwxyz', 1)
const hasUpperCase = contains('ABCDEFGHIJKLMNOPQRSTUVWXYZ', 1)
const hasNumber = contains('0123456789', 1)
const hasSpecialChar = contains('!@#$%^&*()-+_', 1)
const compose = (...fns) => (x) => fns.map((fn) => fn(x))
const passwordPolicyCheck = compose(
    minLength(12),
    hasLowerCase,
    hasUpperCase,
    hasNumber,
    hasSpecialChar
)
const passwordCheck = (str) => passwordPolicyCheck(str).filter(Boolean).length === 5

const password = "wwsj3" + "*!23X" + "Xd12a"
console.log(passwordCheck(password));