Build forms in React, without the tears Formik is the world's most popular open source form library for React and React Native.

My goal with Formik was to create a scalable, performant, form helper with a minimal API that does the really really annoying stuff, and leaves the rest up to you.

The Basics We’re going to start with the most verbose way of using Formik. While this may seem a bit long-winded, it’s important to see how Formik builds on itself so you have a full grasp of …

Use this option to tell Formik to run validations on change events and change -related methods. More specifically, when either handleChange, setFieldValue, or setValues are called.

Formik supports synchronous and asynchronous form-level and field-level validation. Furthermore, it comes with baked-in support for schema-based form-level validation through Yup.

Basic Example This example demonstrates how to use Formik in its most basic way.

<Field /> will automagically hook up inputs to Formik. It uses the name attribute to match up with Formik state. <Field /> will default to an HTML <input /> element.

To submit a form in Formik, you need to somehow fire off the provided handleSubmit(e) or submitForm prop. When you call either of these methods, Formik will execute the following …

This section will walk you through them and what we consider to be best practices. The gist Before going any further, here's a super minimal gist of how to use Formik with React Native …

Use this option to tell Formik to run validations on change events and change -related methods. More specifically, when either handleChange, setFieldValue, or setValues are called.