Validator

A javascript/typescript validation library

Installation

Npm:

$ npm install --save @nbottarini/validator

Yarn:

$ yarn add @nbottarini/validator

Usage

function validate(validator: Validator, form: SignupForm) {
    validator.check('firstName', form.firstName)
        .notNullOrBlank()
        .minLength(2)
        .maxLength(50)
    
    validator.check('age', form.age)
        .optional()
        .number('Must be a valid number')
        .min(18, 'Must be older than 18')

    validator.check('email', form.email)
        .email()

    validator.check('date', form.date)
        .date('DD/MM/YYYY')

    validator.check('password', form.password)
        .notNullOrBlank()
        .minLength(8)

    validator.check('confirmPassword', form.confirmPassword)
        .equals(form.password)

    validator.check('maxPrice', form.maxPrice)
        .zeroOrPositive(form.maxPrice)

    validator.check('evenNumber', form.evenNumber)
        .custom((value) => value % 2 === 0, 'Must be even')
}

const validator = new Validator()
validate(validator, signupForm)
const hasErrors = validator.hasErrors()
const errors = validator.allErrorMessages()

try {
    validator.throwIfHasErrors()
} catch (e) {
    // Do something with thrown error
}