formik-wizard

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A multi-step form component powered by formik and react-albus

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**THIS LIBRARY IS LOOKING FOR MAINTAINERS. I (LUIS FELIPE ZAGUINI) DON'T HAVE ENOUGH BANDWIDTH ANYMORE TO WORK ON OSS. IF YOU ARE INTERESTED, PLEASE CONTACT ME: `luisfelipezaguini [at] gmail [dot] com`**

Also, we're in the process of making this library way more flexible, allowing people to use whatever form and wizard library they like. [Please read this issue](https://github.com/zaguiini/formik-wizard/issues/39) and comment if you will to contribute.

---

# formik-wizard

A multi-step form component powered by [`formik`](https://github.com/jaredpalmer/formik) and [`react-albus`](https://github.com/americanexpress/react-albus).

## Why?

Large forms are generally bad for User Experience: it becomes both tiresome to fill and, in most of the cases, it gets slow.
I've built this lib to tackle this problem: dividing one big form in multiple smaller forms, it gets much easier to reason about,
both as a developer and as a user.

All the smaller forms may include validation (powered by [`yup`](https://github.com/jquense/yup)) and default values.

You can check the demo [here](http://formik-wizard.surge.sh/), with the corresponding source code [here](./example).

## Installation

You need to have `formik` and `react-albus` installed -- they are peer dependencies.
After that, just `yarn add formik-wizard` and you're good to go!

**If you plan to validate the sections, you need to install `yup` as well!**

## Usage

Check out the [example](./example) source code and the [typings](./src/types.ts).
There's a hook called `useFormikWizard` that you can use to read and write sections values and form statuses.
I recommend using [`immer`](https://github.com/mweststrate/immer) because you're modifying the steps data directly!

## Usage with `react-native`

It's pretty straightforward: just use the `Form` prop component as a `children` forwarder. Example:

```js
<FormikWizard
  {...props}
  Form={({ children }) => children}
/>
```

That's needed because there's no `form` web component on React Native and `formik-wizard` (and `formik`) fallbacks to it.

Also, React Native doesn't have a submit button/input. To achieve a similar result, grab [**formik**'s context](3how-do-you-access-the-formik-context-inside-the-step-form-eg-for-conditional-rendering) and fire its submit handler.

**REMEMBER: IT'S NOT FORMIK-WIZARD'S CONTEXT. IT'S FORMIK'S!!!**

## Troubleshooting

### I can't use it as the default export

That's a known issue. Jared palmer's tsdx [doesn't handle default exports very well](https://github.com/palmerhq/tsdx/issues/165). Two options:

#### Use it as `FormikWizard.default`

```js
import FormikWizard from 'formik-wizard'

function App() {
  return <FormikWizard.default />
}
```

or...

#### Use the named export

```js
import { FormikWizard } from 'formik-wizard'

function App() {
  return <FormikWizard />
}
```

### How do you use setStatus, setSubmitting inside `handleSubmit` function?

The `onSubmit` function expects a `Promise`. Whatever you return from that `Promise` will be set as the status. For example:

```js
import { useCallback } from 'react'

const handleSubmit = useCallback((values) => {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve({
        message: "success"
      })
    }, 5000)
  })
}, [])
```

While that `Promise` is pending, the `isSubmitting` flag is set to `true`. The status is set automatically from the return of that `Promise`.

### How do you access the Formik context inside the step form (e.g. for conditional rendering)?

The step form is wrapped inside a [`Formik
component`](https://jaredpalmer.com/formik/docs/api/formik) but its props
aren't propagated to the form component. Anyway, you'll still have access to the
Formik context through one of these methods:

* by using the [`connect
  HOC`](https://jaredpalmer.com/formik/docs/api/connect).
* by using the [`Field
  component`](https://jaredpalmer.com/formik/docs/api/field) with a render prop
  or a callback function as children.
* by using the `useFormikContext` hook (available in Formik's v2).

## License

MIT

## Credits

This project was bootstrapped with [TSDX](https://github.com/jaredpalmer/tsdx).

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