Yup schema method to ensure a field value equals field value of another field. Useful for fields like confirm password field

yup.equalTo.js

// thanks 🙏 
// https://github.com/jquense/yup/issues/97

function equalTo(ref, msg) {
	return this.test({
		name: 'equalTo',
		exclusive: false,
    message: msg || '${path} must be the same as ${reference}',
		params: {
			reference: ref.path
		},
		test: function(value) {
      return value === this.resolve(ref) 
		}
	})
};

yup.addMethod(yup.string, 'equalTo', equalTo);


 const inst = yup.object({
   account: yup.string().min(7).required(),
   confirmedAccount: yup.string().equalTo(yup.ref('account'))
 });

inst.validate({ account: '1234567', confirmedAccount: '12345678' }, {
	abortEarly: false
}).then(function() { 
	console.log('ok', arguments);
})
.catch(function(error) {
	console.log('failed', error);
})