React Native Web JSONSchema Form


Render customizable forms using JSON schema for responsive websites and Expo apps (both iOS and Android). This library was inpired on react-jsonschema-form but was built with React Native and React Native Web in mind.

- See this library in production at https://www.carelulu.com
- Skeleton project using React Native Web Jsonschema Form at https://www.carelulu.com/react-native-web-example/login and https://github.com/CareLuLu/react-native-web-skeleton

Table of Contents

* Documentation
* Setup
* Requirements
* Installation
* Examples
* Basic Form
* Event Handlers
* Custom Theme
* Form Validation
* Array Fields
* Props
* Widgets
* License

Documentation

Coming soon!

Setup

React Native Web JSONSchema Form was created to facilitate the development of write once, run anywhere web and mobile apps. In order to accomplish that, this library is heavily based on React Native and React Native Web.

$3

First you need to install react ^16.8.3 (this library uses react-hooks).

``sh
yarn add react
`

If you're using Expo, they use a custom version of react-native and therefore you need to check what is the React Native repository for the Expo version you're using. For Expo v33.x.x you'd run:

`sh
yarn add https://github.com/expo/react-native/archive/sdk-33.0.0.tar.gz
`

If your project is also being used for web, please install React Native Web. Make sure your babel/webpack build replace all react-native imports with react-native-web (details here). If you used React Create App, aliasing is already taken care off for you.

`sh
yarn add react-dom react-native-web
`

This library is backed by react-native-elements. Please make sure you have installed react-native-elements and its dependencies.

`sh
yarn add react-native-elements
`

Please make sure you have installed react-native-community/datetimepicker and its dependencies.

`sh
yarn add @react-native-community/datetimepicker
`

Please make sure you have installed react-native-image-picker and its dependencies.

`sh
yarn add react-native-image-picker
`

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Install the library using yarn or npm.

`sh
yarn add react-native-web-jsonschema-form
`

Examples

$3

`javascript
import React from 'react';
import { useHistory } from 'react-router';
import { Alert } from 'react-native';
import { UIProvider, Form } from 'react-native-web-jsonschema-form';
import { Router, Switch } from 'react-router-dom';
// import { Router, Switch } from 'react-router-native';

const theme = {
input: {
focused: StyleSheet.create({
border: {
borderColor: 'yellow',
},
}),
},
};

const schema = {
type: 'object',
properties: {
username: { type: 'string' },
password: { type: 'string' },
},
};

const BasicForm = ({ formData, onChange }) => (
formData={formData}
schema={schema}
onChange={onChange}
/>
);

const ThemeWrapper = ({ children }) => {
const history = useHistory();

return (

{children}

);
};

const App = () => {
const [formData, setFormData] = useState({});

const onChange = (event) => setFormData({
...formData,
[event.params.name]: event.params.value,
});

return (



formData={formData}
onChange={onChange}
/>



);
};
`

$3

`javascript
import React from 'React';
import PropTypes from 'prop-types';
import { Loading, Alert } from 'react-native-web-ui-components';
import { Form } from 'react-native-web-jsonschema-form';

class MyForm extends React.Component {
static propTypes = {
controller: PropTypes.string.isRequired,
action: PropTypes.string.isRequired,
};

constructor(props) {
super(props);
this.state = {
schema: null,
message: null,
posting: null,
};
}

onSubmit = async (event) => {
const { action, controller } = this.props;
const { values } = event.params;
this.setState({ posting: true });
return fetch(/${controller}/${action}, {
method: 'POST',
body: JSON.stringify(values),
});
};

onSuccess = async (event) => {
const { response } = event.params;
this.setState({
posting: false,
message: response.message,
});
};

onError = async (event) => {
// These are errors for fields that are not included in the schema
const { exceptions } = event.params;
const warning = Object.keys(exceptions).map(k => exceptions[k].join('\n'));
this.setState({
posting: false,
message: warning.length ? warning.join('\n') : null,
});
};

render() {
const { schema, posting, message } = this.state;
if (!schema) {
const self = this;
fetch(/get-schema/${controller}/${action})
.then((schema) => self.setState({ schema }));

return ;
}

return (

{posting ? : null}
{message ? (

Message

) : null}
schema={schema}
onSubmit={this.onSubmit}
onSuccess={this.onSuccess}
onError={this.onError}
/>

);
}
}
`

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There are 5 input states: regular, focused, disabled, readonly and error. On which one of them you can define styles for background, border, text, placeholder, opacity, selected and unselected. These properties will be used accordingly by the widgets provided in this library. For example, selected and unselected will be used checkboxes and radioboxes to represent checked and unchecked.

`javascript
const theme = {
input: {
focused: StyleSheet.create({
border: {
borderColor: 'yellow',
borderWidth: 2,
borderStyle: 'solid',
},
background: {
backgroundColor: 'white',
},
text: {
fontSize: 14,
color: '#545454',
},
placeholder: {
color: '#FAFAFA',
},
opacity: {
opacity: 1,
},
selected: {
color: 'blue',
},
unselected: {
color: '#FAFAFA',
},
}),
regular: {...},
disabled: {...},
readonly: {...},
error: {...},
},
};

const ThemeWrapper = ({ children }) => {
const history = useHistory();

return (

{children}

);
};
`

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See https://github.com/CareLuLu/react-native-web-jsonschema-form/issues/139#issuecomment-654377982.

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See https://github.com/CareLuLu/react-native-web-jsonschema-form/issues/113#issuecomment-621375353.

$3

The Form has the following props:

`javascript
import React from 'react';
import Form from 'react-native-web-jsonschema-form';

const Example = ({
// Misc
name, // String to be used as id, if empty a hash will be used instead.
onRef, // Function to be called with the form instance. This is NOT a DOM/Native element.
scroller, // If provided, this will be passed to the widgets to allow disabling ScrollView during a gesture.
wigdets, // Object with a list of custom widgets.


// Data
formData, // Initial data to populate the form. If this attribute changes, the form will update the data.
filterEmptyValues, // If true, all empty and non-required fields will be omitted from the submitted values.

// Schema
schema, // JSON schema
uiSchema, // JSON schema modifying UI defaults for schema
errorSchema, // JSON schema with errors

// Events
// * All events can be synchronous or asynchronous functions.
// * All events receive one parameter event with name, preventDefault() and params.
onFocus,
onChange,
onSubmit,
onCancel,
onSuccess,
onError,

// Layout
buttonPosition, // left, right, center
submitButton, // If false, it will not be rendered. If it is a string, it will be used as the default button text.
cancelButton, // If false, it will not be rendered. If it is a string, it will be used as the default button text.
SubmitButton, // Component to render the submit button
CancelButton, // Component to render the cancel button
}) => (