@hookform/resolvers

What is @hookform/resolvers?

The @hookform/resolvers package is used in conjunction with React Hook Form to integrate external validation libraries. It provides resolvers that allow you to use your preferred validation schema with React Hook Form, ensuring that form data adheres to certain rules before it is processed or submitted.

What are @hookform/resolvers's main functionalities?

Yup Resolver

Integrates Yup validation schema with React Hook Form.

{"import { yupResolver } from '@hookform/resolvers/yup';\nimport * as yup from 'yup';\n\nconst schema = yup.object().shape({\n  name: yup.string().required(),\n  age: yup.number().positive().integer().required(),\n});\n\nconst { register, handleSubmit, errors } = useForm({\n  resolver: yupResolver(schema)\n});\n\n// In your form...\n<input name='name' ref={register} />\n<p>{errors.name?.message}</p>\n<input name='age' ref={register} />\n<p>{errors.age?.message}</p>"}

Joi Resolver

Integrates Joi validation schema with React Hook Form.

{"import { joiResolver } from '@hookform/resolvers/joi';\nimport Joi from 'joi';\n\nconst schema = Joi.object({\n  username: Joi.string().alphanum().min(3).max(30).required(),\n  password: Joi.string().pattern(new RegExp('^[a-zA-Z0-9]{3,30}$')),\n});\n\nconst { register, handleSubmit, errors } = useForm({\n  resolver: joiResolver(schema)\n});\n\n// In your form...\n<input name='username' ref={register} />\n<p>{errors.username?.message}</p>\n<input name='password' ref={register} />\n<p>{errors.password?.message}</p>"}

Zod Resolver

Integrates Zod validation schema with React Hook Form.

{"import { zodResolver } from '@hookform/resolvers/zod';\nimport { z } from 'zod';\n\nconst schema = z.object({\n  firstName: z.string().min(1, { message: 'First name is required' }),\n  age: z.number().min(10, { message: 'Minimum age is 10' }),\n});\n\nconst { register, handleSubmit, errors } = useForm({\n  resolver: zodResolver(schema)\n});\n\n// In your form...\n<input name='firstName' ref={register} />\n<p>{errors.firstName?.message}</p>\n<input name='age' ref={register} />\n<p>{errors.age?.message}</p>"}

Other packages similar to @hookform/resolvers

react-hook-form

React Hook Form is the core library that @hookform/resolvers is designed to work with. It provides a way to manage forms with minimal re-rendering, but it does not include built-in schema-based validation. @hookform/resolvers complements it by adding this capability.

formik

Formik is another popular form management library for React. It handles form state, validation, and submission. Unlike React Hook Form, Formik includes built-in support for Yup validation without needing an additional resolver package.

redux-form

Redux Form is a form library that works with Redux for state management. It includes validation functionalities but is generally considered heavier and more complex than React Hook Form and requires Redux to be part of the project.

README

Performant, flexible and extensible forms with easy to use validation.

React Hook Form Resolvers

This function allows you to use any external validation library such as Yup, Zod, Joi, Vest, Ajv and many others. The goal is to make sure you can seamlessly integrate whichever validation library you prefer. If you're not using a library, you can always write your own logic to validate your forms.

Install

Install your preferred validation library alongside @hookform/resolvers.

npm install @hookform/resolvers # npm
yarn add @hookform/resolvers # yarn
pnpm install @hookform/resolvers # pnpm
bun install @hookform/resolvers # bun

Resolver Comparison

resolver	Infer values from schema	criteriaMode
AJV	❌	`firstError
Arktype	✅	firstError
class-validator	✅	`firstError
computed-types	✅	firstError
Effect	✅	`firstError
fluentvalidation-ts	❌	firstError
io-ts	✅	firstError
joi	❌	`firstError
Nope	❌	firstError
Standard Schema	✅	`firstError
Superstruct	✅	firstError
typanion	✅	firstError
typebox	✅	`firstError
typeschema	❌	`firstError
valibot	✅	`firstError
vest	❌	`firstError
vine	✅	`firstError
yup	✅	`firstError
zod	✅	`firstError

TypeScript

Most of the resolvers can infer the output type from the schema. See comparison table for more details.

useForm<Input, Context, Output>()

Example:

import { useForm } from 'react-hook-form';
import { zodResolver } from '@hookform/resolvers/zod';
import { z } from 'zod';

const schema = z.object({
  id: z.number(),
});

// Automatically infers the output type from the schema
useForm({
  resolver: zodResolver(schema),
});

// Force the output type
useForm<z.input<typeof schema>, any, z.output<typeof schema>>({
  resolver: zodResolver(schema),
});

Links

• React-hook-form validation resolver documentation

Supported resolvers

• Install
• Links
  • Supported resolvers
• API
• Quickstart
  • Yup
  • Zod
  • Superstruct
  • Joi
  • Vest
  • Class Validator
  • io-ts
  • Nope
  • computed-types
  • typanion
  • Ajv
  • TypeBox
    • With ValueCheck
    • With TypeCompiler
  • ArkType
  • Valibot
  • TypeSchema
  • effect-ts
  • VineJS
  • fluentvalidation-ts
  • standard-schema
• Backers
  • Sponsors
• Contributors

API

type Options = {
  mode: 'async' | 'sync',
  raw?: boolean
}

resolver(schema: object, schemaOptions?: object, resolverOptions: Options)

	type	Required	Description
schema	object	✓	validation schema
schemaOptions	object		validation library schema options
resolverOptions	object		resolver options, async is the default mode

Quickstart

Yup

Dead simple Object schema validation.

import { useForm } from 'react-hook-form';
import { yupResolver } from '@hookform/resolvers/yup';
import * as yup from 'yup';

const schema = yup
  .object()
  .shape({
    name: yup.string().required(),
    age: yup.number().required(),
  })
  .required();

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: yupResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('name')} />
      <input type="number" {...register('age')} />
      <input type="submit" />
    </form>
  );
};

Zod

TypeScript-first schema validation with static type inference

⚠️ Example below uses the valueAsNumber, which requires react-hook-form v6.12.0 (released Nov 28, 2020) or later.

import { useForm } from 'react-hook-form';
import { zodResolver } from '@hookform/resolvers/zod';
import { z } from 'zod';

const schema = z.object({
  name: z.string().min(1, { message: 'Required' }),
  age: z.number().min(10),
});

const App = () => {
  const {
    register,
    handleSubmit,
    formState: { errors },
  } = useForm({
    resolver: zodResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('name')} />
      {errors.name?.message && <p>{errors.name?.message}</p>}
      <input type="number" {...register('age', { valueAsNumber: true })} />
      {errors.age?.message && <p>{errors.age?.message}</p>}
      <input type="submit" />
    </form>
  );
};

Superstruct

A simple and composable way to validate data in JavaScript (or TypeScript).

import { useForm } from 'react-hook-form';
import { superstructResolver } from '@hookform/resolvers/superstruct';
import { object, string, number } from 'superstruct';

const schema = object({
  name: string(),
  age: number(),
});

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: superstructResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('name')} />
      <input type="number" {...register('age', { valueAsNumber: true })} />
      <input type="submit" />
    </form>
  );
};

Joi

The most powerful data validation library for JS.

import { useForm } from 'react-hook-form';
import { joiResolver } from '@hookform/resolvers/joi';
import Joi from 'joi';

const schema = Joi.object({
  name: Joi.string().required(),
  age: Joi.number().required(),
});

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: joiResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('name')} />
      <input type="number" {...register('age')} />
      <input type="submit" />
    </form>
  );
};

Vest

Vest 🦺 Declarative Validation Testing.

import { useForm } from 'react-hook-form';
import { vestResolver } from '@hookform/resolvers/vest';
import { create, test, enforce } from 'vest';

const validationSuite = create((data = {}) => {
  test('username', 'Username is required', () => {
    enforce(data.username).isNotEmpty();
  });

  test('password', 'Password is required', () => {
    enforce(data.password).isNotEmpty();
  });
});

const App = () => {
  const { register, handleSubmit, errors } = useForm({
    resolver: vestResolver(validationSuite),
  });

  return (
    <form onSubmit={handleSubmit((data) => console.log(data))}>
      <input {...register('username')} />
      <input type="password" {...register('password')} />
      <input type="submit" />
    </form>
  );
};

Class Validator

Decorator-based property validation for classes.

⚠️ Remember to add these options to your tsconfig.json!

"strictPropertyInitialization": false,
"experimentalDecorators": true

import { useForm } from 'react-hook-form';
import { classValidatorResolver } from '@hookform/resolvers/class-validator';
import { Length, Min, IsEmail } from 'class-validator';

class User {
  @Length(2, 30)
  username: string;

  @IsEmail()
  email: string;
}

const resolver = classValidatorResolver(User);

const App = () => {
  const {
    register,
    handleSubmit,
    formState: { errors },
  } = useForm<User>({ resolver });

  return (
    <form onSubmit={handleSubmit((data) => console.log(data))}>
      <input type="text" {...register('username')} />
      {errors.username && <span>{errors.username.message}</span>}
      <input type="text" {...register('email')} />
      {errors.email && <span>{errors.email.message}</span>}
      <input type="submit" value="Submit" />
    </form>
  );
};

io-ts

Validate your data with powerful decoders.

import React from 'react';
import { useForm } from 'react-hook-form';
import { ioTsResolver } from '@hookform/resolvers/io-ts';
import t from 'io-ts';
// you don't have to use io-ts-types, but it's very useful
import tt from 'io-ts-types';

const schema = t.type({
  username: t.string,
  age: tt.NumberFromString,
});

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: ioTsResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('username')} />
      <input type="number" {...register('age')} />
      <input type="submit" />
    </form>
  );
};

export default App;

Nope

A small, simple, and fast JS validator

import { useForm } from 'react-hook-form';
import { nopeResolver } from '@hookform/resolvers/nope';
import Nope from 'nope-validator';

const schema = Nope.object().shape({
  name: Nope.string().required(),
  age: Nope.number().required(),
});

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: nopeResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('name')} />
      <input type="number" {...register('age')} />
      <input type="submit" />
    </form>
  );
};

computed-types

TypeScript-first schema validation with static type inference

import { useForm } from 'react-hook-form';
import { computedTypesResolver } from '@hookform/resolvers/computed-types';
import Schema, { number, string } from 'computed-types';

const schema = Schema({
  username: string.min(1).error('username field is required'),
  age: number,
});

const App = () => {
  const {
    register,
    handleSubmit,
    formState: { errors },
  } = useForm({
    resolver: computedTypesResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('name')} />
      {errors.name?.message && <p>{errors.name?.message}</p>}
      <input type="number" {...register('age', { valueAsNumber: true })} />
      {errors.age?.message && <p>{errors.age?.message}</p>}
      <input type="submit" />
    </form>
  );
};

typanion

Static and runtime type assertion library with no dependencies

import { useForm } from 'react-hook-form';
import { typanionResolver } from '@hookform/resolvers/typanion';
import * as t from 'typanion';

const isUser = t.isObject({
  username: t.applyCascade(t.isString(), [t.hasMinLength(1)]),
  age: t.applyCascade(t.isNumber(), [
    t.isInteger(),
    t.isInInclusiveRange(1, 100),
  ]),
});

const App = () => {
  const {
    register,
    handleSubmit,
    formState: { errors },
  } = useForm({
    resolver: typanionResolver(isUser),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('name')} />
      {errors.name?.message && <p>{errors.name?.message}</p>}
      <input type="number" {...register('age')} />
      {errors.age?.message && <p>{errors.age?.message}</p>}
      <input type="submit" />
    </form>
  );
};

Ajv

The fastest JSON validator for Node.js and browser

import { useForm } from 'react-hook-form';
import { ajvResolver } from '@hookform/resolvers/ajv';

// must use `minLength: 1` to implement required field
const schema = {
  type: 'object',
  properties: {
    username: {
      type: 'string',
      minLength: 1,
      errorMessage: { minLength: 'username field is required' },
    },
    password: {
      type: 'string',
      minLength: 1,
      errorMessage: { minLength: 'password field is required' },
    },
  },
  required: ['username', 'password'],
  additionalProperties: false,
};

const App = () => {
  const {
    register,
    handleSubmit,
    formState: { errors },
  } = useForm({
    resolver: ajvResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((data) => console.log(data))}>
      <input {...register('username')} />
      {errors.username && <span>{errors.username.message}</span>}
      <input {...register('password')} />
      {errors.password && <span>{errors.password.message}</span>}
      <button type="submit">submit</button>
    </form>
  );
};

TypeBox

JSON Schema Type Builder with Static Type Resolution for TypeScript

With ValueCheck

import { useForm } from 'react-hook-form';
import { typeboxResolver } from '@hookform/resolvers/typebox';
import { Type } from '@sinclair/typebox';

const schema = Type.Object({
  username: Type.String({ minLength: 1 }),
  password: Type.String({ minLength: 1 }),
});

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: typeboxResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('username')} />
      <input type="password" {...register('password')} />
      <input type="submit" />
    </form>
  );
};

With TypeCompiler

A high-performance JIT of TypeBox, read more

import { useForm } from 'react-hook-form';
import { typeboxResolver } from '@hookform/resolvers/typebox';
import { Type } from '@sinclair/typebox';
import { TypeCompiler } from '@sinclair/typebox/compiler';

const schema = Type.Object({
  username: Type.String({ minLength: 1 }),
  password: Type.String({ minLength: 1 }),
});

const typecheck = TypeCompiler.Compile(schema);

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: typeboxResolver(typecheck),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('username')} />
      <input type="password" {...register('password')} />
      <input type="submit" />
    </form>
  );
};

ArkType

TypeScript's 1:1 validator, optimized from editor to runtime

import { useForm } from 'react-hook-form';
import { arktypeResolver } from '@hookform/resolvers/arktype';
import { type } from 'arktype';

const schema = type({
  username: 'string>1',
  password: 'string>1',
});

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: arktypeResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('username')} />
      <input type="password" {...register('password')} />
      <input type="submit" />
    </form>
  );
};

Valibot

The modular and type safe schema library for validating structural data

import { useForm } from 'react-hook-form';
import { valibotResolver } from '@hookform/resolvers/valibot';
import * as v from 'valibot';

const schema = v.object({
  username: v.pipe(
    v.string('username is required'),
    v.minLength(3, 'Needs to be at least 3 characters'),
    v.endsWith('cool', 'Needs to end with `cool`'),
  ),
  password: v.string('password is required'),
});

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: valibotResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('username')} />
      <input type="password" {...register('password')} />
      <input type="submit" />
    </form>
  );
};

TypeSchema

Universal adapter for schema validation, compatible with any validation library

import { useForm } from 'react-hook-form';
import { typeschemaResolver } from '@hookform/resolvers/typeschema';
import { z } from 'zod';

// Use your favorite validation library
const schema = z.object({
  username: z.string().min(1, { message: 'Required' }),
  password: z.number().min(1, { message: 'Required' }),
});

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: typeschemaResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('username')} />
      <input type="password" {...register('password')} />
      <input type="submit" />
    </form>
  );
};

effect-ts

A powerful TypeScript framework that provides a fully-fledged functional effect system with a rich standard library.

import React from 'react';
import { useForm } from 'react-hook-form';
import { effectTsResolver } from '@hookform/resolvers/effect-ts';
import { Schema } from 'effect';

const schema = Schema.Struct({
  username: Schema.String.pipe(
    Schema.nonEmptyString({ message: () => 'username required' }),
  ),
  password: Schema.String.pipe(
    Schema.nonEmptyString({ message: () => 'password required' }),
  ),
});

type FormData = typeof schema.Type;

interface Props {
  onSubmit: (data: FormData) => void;
}

function TestComponent({ onSubmit }: Props) {
  const {
    register,
    handleSubmit,
    formState: { errors },
    // provide generic if TS has issues inferring types
  } = useForm<FormData>({
    resolver: effectTsResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <input {...register('username')} />
      {errors.username && <span role="alert">{errors.username.message}</span>}

      <input {...register('password')} />
      {errors.password && <span role="alert">{errors.password.message}</span>}

      <button type="submit">submit</button>
    </form>
  );
}

VineJS

VineJS is a form data validation library for Node.js

import { useForm } from 'react-hook-form';
import { vineResolver } from '@hookform/resolvers/vine';
import vine from '@vinejs/vine';

const schema = vine.compile(
  vine.object({
    username: vine.string().minLength(1),
    password: vine.string().minLength(1),
  }),
);

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: vineResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('username')} />
      {errors.username && <span role="alert">{errors.username.message}</span>}
      <input {...register('password')} />
      {errors.password && <span role="alert">{errors.password.message}</span>}
      <button type="submit">submit</button>
    </form>
  );
};

fluentvalidation-ts

A TypeScript-first library for building strongly-typed validation rules

import { useForm } from 'react-hook-form';
import { fluentValidationResolver } from '@hookform/resolvers/fluentvalidation-ts';
import { Validator } from 'fluentvalidation-ts';

class FormDataValidator extends Validator<FormData> {
  constructor() {
    super();

    this.ruleFor('username')
      .notEmpty()
      .withMessage('username is a required field');
    this.ruleFor('password')
      .notEmpty()
      .withMessage('password is a required field');
  }
}

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: fluentValidationResolver(new FormDataValidator()),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('username')} />
      {errors.username && <span role="alert">{errors.username.message}</span>}
      <input {...register('password')} />
      {errors.password && <span role="alert">{errors.password.message}</span>}
      <button type="submit">submit</button>
    </form>
  );
};

standard-schema

A standard interface for TypeScript schema validation libraries

Example zod

import { useForm } from 'react-hook-form';
import { standardSchemaResolver } from '@hookform/resolvers/standard-schema';
import { z } from 'zod';

const schema = z.object({
  name: z.string().min(1, { message: 'Required' }),
  age: z.number().min(10),
});

const App = () => {
  const {
    register,
    handleSubmit,
    formState: { errors },
  } = useForm({
    resolver: standardSchemaResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('name')} />
      {errors.name?.message && <p>{errors.name?.message}</p>}
      <input type="number" {...register('age', { valueAsNumber: true })} />
      {errors.age?.message && <p>{errors.age?.message}</p>}
      <input type="submit" />
    </form>
  );
};

Example arkType

import { useForm } from 'react-hook-form';
import { standardSchemaResolver } from '@hookform/resolvers/standard-schema';
import { type } from 'arktype';

const schema = type({
  username: 'string>1',
  password: 'string>1',
});

const App = () => {
  const { register, handleSubmit } = useForm({
    resolver: standardSchemaResolver(schema),
  });

  return (
    <form onSubmit={handleSubmit((d) => console.log(d))}>
      <input {...register('username')} />
      <input type="password" {...register('password')} />
      <input type="submit" />
    </form>
  );
};

Backers

Thanks go to all our backers! [Become a backer].

Contributors

Thanks go to these wonderful people! [Become a contributor].