Yup-Password

Yup, dead simple password validation.

Install

Using npm:

$ npm install yup-password

Using yarn:

$ yarn add yup-password

Usage

Plug and play:

// MJS / TS
import * as yup from 'yup'
import YupPassword from 'yup-password'
YupPassword(yup) // extend yup

// CJS
const yup = require('yup')
require('yup-password')(yup) // extend yup

// Build schema
const schema = yup.object().shape({
    username: yup.string().email().required(),
    password: yup.string().password().required(),
})

const input = {
    username: '[e-mail]',
    password: 'secret',
}

try {
    // validate
    const res = await schema.validate(input, { abortEarly: false })
    //  ...
} catch (e) {
    console.log(e.errors) // => [
    //   'password must be at least 8 characters',
    //   'password must contain at least 1 uppercase letter',
    //   'password must contain at least 1 number',
    //   'password must contain at least 1 symbol',
    // ]
}

Override, disable or add additional rules:

const schema = yup.string().password()
    .minLowercase(8) // raise the lowercase requirement to 8
    .min(0) // disable minimum characters completely
    .minWords(2) // add an additional rule

try {
    const res = await schema.validate('secret', { abortEarly: false })
    //  ...
} catch(e) {
    console.log(e.errors) // => [
    //   'password must contain at least 2 words',              <-- added
    //   'password must contain at least 8 lowercase letters',  <-- overridden
    //   'password must contain at least 1 uppercase letter',
    //   'password must contain at least 1 number',
    //   'password must contain at least 1 symbol',
    // ]
}

Pick and choose your password rules:

const schema = yup.string().min(6).minUppercase(3).maxRepeating(2).minWords(2)

await schema.isValid('Now, THIS is some password.') // => true
await schema.isValid('But thiiis is not.') // => false

Localize your error messages:

yup.setLocale({
    string: {
        minLowercase: 'Localized message (path=${path};length=${length})',
        minUppercase: 'Localized message (path=${path};length=${length})',
        minNumbers: 'Localized message (path=${path};length=${length})',
        minSymbols: 'Localized message (path=${path};length=${length})',
        maxRepeating: 'Localized message (path=${path};length=${length})',
        minWords: 'Localized message (path=${path};length=${length})',
    }, // when using typescript, you may want to append `as any` to the end
       // of this object to avoid type errors.
})

API

.password()

Password must meet the default requirements: at least 8 characters, at most 250 characters, at least 1 lowercase letter, at least 1 uppercase letter, at least 1 number and at least 1 symbol.

const schema = yup.string().password()

.minLowercase(length?: number = 1, message?: string)

Password must contain X amount of lowercase letters or more.

const schema = yup.string().minLowercase(3, 'custom message')

.minUppercase(length?: number = 1, message?: string)

Password must contain X amount of uppercase letters or more.

const schema = yup.string().minUppercase(3, 'custom message')

.minNumbers(length?: number = 1, message?: string)

Password must contain X amount of numbers or more.

const schema = yup.string().minNumbers(3, 'custom message')

.minSymbols(length?: number = 1, message?: string)

Password must contain X amount of symbols or more.

const schema = yup.string().minSymbols(3, 'custom message')

.maxRepeating(length?: number = 2, message?: string)

Password must not contain a sequence of X amount of repeated characters. For example, if the limit is 2 thiis will pass but thiiis will not.

const schema = yup.string().maxRepeating(3, 'custom message')

.minWords(length?: number = 2, message?: string)

Password must contain X amount of words or more. So long as a sequence of characters contains letters or numbers, it will be recognized as a word. For example secret, 1st! and 1337 count as words, but !@#$% does not.

const schema = yup.string().minWords(3, 'custom message')

License

This project is open-sourced software licensed under the MIT license.