Yup.md

Yup

A JavaScript schema builder for value parsing and validation.

Docs

• yup Github Docs

Installation

npm install -S yup
# or
yarn add yup

Usage

import * as yup from 'yup';

let schema = yup.object().shape({
name: yup.string().required(),
age: yup.number().required().positive().integer(),
email: yup.string().email(),
website: yup.string().url(),
createdOn: yup.date().default(function () {
  return new Date();
}),
});

// check validity
schema
.isValid({
  name: 'jimmy',
  age: 24,
})
.then(function (valid) {
  valid; // => true
});

// you can try and type cast objects to the defined schema
schema.cast({
name: 'jimmy',
age: '24',
createdOn: '2014-09-23T19:25:25Z',
});
// => { name: 'jimmy', age: 24, createdOn: Date }

Tutorial

• YouTube: Next.js API Routes Validation using YUP: Share frontend and backend validation using YUP schemas