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MobX React Form

Reactive MobX Form State Management

Features

• Extensibles Validation Plugins.
• Sync & Async Validation (w/ Promises & automatic errors).
• Nested Fields (w/ Serialization & Validation).
• Nested Forms (w/ Nested Submission & Validation Hooks).
• Event Hooks, Event Handlers & Validation Hooks
• Functional Computed Field Props
• Field Props Observers & Interceptors
• Field Props Bindings for custom Components.
• Support for Material UI, React Widgets, React Select & more.
• Forms Composer: to handle multi-forms submit, validations and other actions
• Dedicated DevTools Package.

Quick Start

1npm install --save mobx-react-form

Choose and Setup a Validation Plugin

Below we are creating a plugins object using the validatorjs package to enable DVR functionalities (Declarative Validation Rules).

1import dvr from 'mobx-react-form/lib/validators/DVR';
2import validatorjs from 'validatorjs';
3
4const plugins = {
5  dvr: dvr({
6    package: validatorjs
7  })
8};

See Validation Plugins for more info on supported packages.

Define the Form Fields

Define the fields as a collection with a rules property for the validation.

1const fields = [{
2  name: 'email',
3  label: 'Email',
4  placeholder: 'Insert Email',
5  rules: 'required|email|string|between:5,25',
6}, {
7  name: 'password',
8  label: 'Password',
9  placeholder: 'Insert Password',
10  rules: 'required|string|between:5,25',
11  type: 'password',
12}, {
13  name: 'passwordConfirm',
14  label: 'Password Confirmation',
15  placeholder: 'Confirm Password',
16  rules: 'required|string|same:password',
17  type: 'password',
18}];

See Fields Definitions and all available Field Props on the docs.

Define the Validation Hooks

1const hooks = {
2  onSuccess(form) {
3    alert('Form is valid! Send the request here.');
4    // get field values
5    console.log('Form Values!', form.values());
6  },
7  onError(form) {
8    alert('Form has errors!');
9    // get all form errors
10    console.log('All form errors', form.errors());
11  }
12}

See more on the docs about the Validation Hooks and the Event Hooks

Initialize the Form

Simply pass the fields, plugins and hooks objects to the constructor

1import MobxReactForm from 'mobx-react-form';
2
3const myForm = new MobxReactForm({ fields }, { plugins, hooks });

Learn more on the docs about the Form Instance and the Form Options

Pass the myForm to a react component

The package provide some built-in and ready to use Event Handlers:

onSubmit(e), onClear(e), onReset(e) & more...

1import React from 'react';
2import { observer } from 'mobx-react';
3
4export default observer(({ myForm }) => (
5  <form onSubmit={myForm.onSubmit}>
6    <label htmlFor={myForm.$('email').id}>
7      {myForm.$('email').label}
8    </label>
9    <input {...myForm.$('email').bind()} />
10    <p>{myForm.$('email').error}</p>
11
12    {/* ... other inputs ... */}
13
14    <button type="submit" onClick={myForm.onSubmit}>Submit</button>
15    <button type="button" onClick={myForm.onClear}>Clear</button>
16    <button type="button" onClick={myForm.onReset}>Reset</button>
17
18    <p>{myForm.error}</p>
19  </form>
20));

See more on the docs about the Field Props Bindings

Extending the Form class

See how to implement the same configuration of this quickstart extending the Form class

Contributing

1. Fork the repository
2. Make applicable changes (with tests!)
3. To run tests: npm run test
4. Ensure builds succeed: npm run build
5. Commit and run pre-commit checks: npm run commit

New Issues

When opening new issues, provide the setup of your form in a CodeSandbox.

These issues, and the ones which provides also PR with failing tests will get higher priority.

Contributors

This project exists thanks to all the people who contribute.

Backers

Thank you to all our backers! 🙏 [Become a backer]

Sponsors

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