React Hook Form

React Hook Form is a performant, flexible, and extensible forms library for React created by Bill Luo in 2019, providing form state management, validation, error handling, and submission through React hooks, with features including uncontrolled components for minimal re-renders, schema validation through Yup, Zod, Joi, and Superstruct, resolver integration, async validation, conditional field rendering, form arrays, nested form fields, watch and subscribe APIs, and the FormProvider for context-based field access, designed with a focus on performance through uncontrolled inputs that minimize re-renders, adopted by over forty thousand companies including Microsoft, Amazon, and Atlassian for their form implementations. The register function connects input elements to the form state through a ref-based approach, with the registered fields tracked without triggering re-renders on every keystroke, resulting in significantly faster performance compared to controlled component approaches, while the handleSubmit function wraps the form submission, performing validation before calling the callback, and providing access to the validated form data or errors. The validation system supports built-in validators including required, minLength, maxLength, min, max, pattern, and validate for custom functions, with the resolver integration enabling schema-based validation through Yup, Zod, or custom resolvers, with validation performed on blur, change, or submit based on the mode configuration. The Controller component bridges controlled components. The useFieldArray for dynamic field lists. The useWatch for reactive field watching. The FormProvider for nested component access. The DevTools for debugging. The TypeScript support. The accessibility through ARIA attributes. Designed by Bill Luo. Designed for React developers.