Fork changes

1. Adds onChange and onInit functions to formik Formik component props to support form sync where needed
2. Adds handleChange and handleInit functions to withFormik

onChange and handleChange signatures are identical to onSubmit and handleSubmit

onInit and handleInit signatures are identical to onSubmit and handleSubmit with first values argument dropped.

onInit and handleInit functions return handlers to formik control functions, which could be used to update form state upon sync events.

Original Formik docs follows now

Overview

Let's face it, forms are really verbose in React. To make matters worse, most form helpers do wayyyy too much magic and often have a significant performance cost associated with them. Formik is a small library that helps you with the 3 most annoying parts:

1. Getting values in and out of form state
2. Validation and error messages
3. Handling form submission

By colocating all of the above in one place, Formik will keep things organized--making testing, refactoring, and reasoning about your forms a breeze.

Docs

• Get Started
• API Reference
• Articles / Tutorials
• Get Help
• Release Notes

In-browser Playgrounds

You can play with Formik in your web browser with these live online playgrounds.

• CodeSandbox (ReactDOM) https://codesandbox.io/s/zKrK5YLDZ
• Expo Snack (React Native) https://snack.expo.io/Bk9pPK87X

Examples

• Basics
• Sync Validation
• Building your own input primitives
• Working with 3rd-party inputs #1: react-select
• Working with 3rd-party inputs #2: Draft.js
• Accessing React lifecycle functions
• React Native
• TypeScript

Organizations and projects using Formik

List of organizations and projects using Formik

Authors

• Jared Palmer @jaredpalmer
• Ian White @eonwhite

Contributors

Formik is made with <3 thanks to these wonderful people (emoji key):

| Jared Palmer💬 💻 🎨 📖 💡 🤔 👀 ⚠️ | Ian White💬 🐛 💻 📖 🤔 👀 | Andrej Badin💬 🐛 📖 | Adam Howard💬 🐛 🤔 👀 | Vlad Shcherbin💬 🐛 🤔 | Brikou CARRE🐛 📖 | Sam Kvale🐛 💻 ⚠️ | | :---: | :---: | :---: | :---: | :---: | :---: | :---: | | Jon Tansey🐛 💻 | Tyler Martinez🐛 📖 |

This project follows the all-contributors specification. Contributions of any kind welcome!

MIT License.