Joi

• joi address
• • Validate email address and domain
• joi formula
• • Math and string formula parser
• joi-date
• • Extensions for advance date rules
• joi pinpoint
• • Return the filename and line number of the calling function
• joi tlds
• • TLDS list for domain validation

const Joi = require('joi');

const schema = Joi.object({
    username: Joi.string() // Username: must be string,
        .alphanum() // only contain alphanumeric characters,
        .min(3) // at least 3 characters long,
        .max(30) // at most 30 characters long,
        .required(), // required

    password: Joi.string()
        .pattern(new RegExp('^[a-zA-Z0-9]{3,30}$')), //optional string that must match pattern

    repeat_password: Joi.ref('password'),

    access_token: [
        Joi.string(),
        Joi.number()
    ],

    birth_year: Joi.number() // number between 1900 and 2013
        .integer()
        .min(1900)
        .max(2013),

    email: Joi.string() // valud email address string, TLD must be .com or .net
        .email({ minDomainSegments: 2, tlds: { allow: ['com', 'net'] } })
})
    .with('username', 'birth_year')
    .xor('password', 'access_token') // only password or access_token can be included in submission
    .with('password', 'repeat_password'); 


schema.validate({ username: 'abc', birth_year: 1994 });
// -> { value: { username: 'abc', birth_year: 1994 } }

schema.validate({});
// -> { value: {}, error: '"username" is required' }

// Also -

try {
    const value = await schema.validateAsync({ username: 'abc', birth_year: 1994 });
}
catch (err) { }