React High Order Form Component

rc-form

React High Order Form Component(web & react-native)

Development

npm install
npm start
open http://localhost:8000/examples/

Feature

Support react.js and even react-native
Validate fields with async-validator

Install

Usage

import { createForm, formShape } from 'rc-form';

class Form extends React.Component {
  static propTypes = {
    form: formShape,
  };

  submit = () => {
    this.props.form.validateFields((error, value) => {
      console.log(error, value);
    });
  }

  render() {
    let errors;
    const { getFieldProps, getFieldError } = this.props.form;
    return (
      <div>
        <input {...getFieldProps('normal')}/>
        <input {...getFieldProps('required', {
          onChange(){}, // have to write original onChange here if you need
          rules: [{required: true}],
        })}/>
        {(errors = getFieldError('required')) ? errors.join(',') : null}
        <button onClick={this.submit}>submit</button>
      </div>
    );
  }
}

export createForm()(Form);

use width react native

Expo preview

avatar

View the source code

Or a quicker version:

import { createForm } from 'rc-form';

class Form extends React.Component {
  componentWillMount() {
    this.requiredDecorator = this.props.form.getFieldDecorator('required', {
      rules: [{required: true}],
    });
  }

  submit = () => {
    this.props.form.validateFields((error, value) => {
      console.log(error, value);
    });
  }

  render() {
    let errors;
    const { getFieldError } = this.props.form;
    return (
      <div>
        {this.requiredDecorator(
          <input
            onChange={
              // can still write your own onChange
            }
          />
        )}
        {(errors = getFieldError('required')) ? errors.join(',') : null}
        <button onClick={this.submit}>submit</button>
      </div>
    );
  }
}

export createForm()(Form);

createForm(option: Object) => (WrappedComponent: React.Component) => React.Component

Option	Description	Type	Default
option.validateMessages	Preseted messages of async-validator	Object	{}
option.onFieldsChange	Called when field changed, you can dispatch fields to redux store.	(props, changed, all): void	NOOP
option.onValuesChange	Called when value changed.	(props, changed, all): void	NOOP
option.mapProps	Get new props transfered to WrappedComponent.	(props): Object	props => props
option.mapPropsToFields	Convert value from props to fields. Used for read fields from redux store.	(props): Object	NOOP
option.fieldNameProp	Where to store the `name` argument of `getFieldProps`.	String	-
option.fieldMetaProp	Where to store the meta data of `getFieldProps`.	String	-
option.fieldDataProp	Where to store the field data	String	-
option.withRef(deprecated)	Maintain an ref for wrapped component instance, use `refs.wrappedComponent` to access.	boolean	false

Note: use wrappedComponentRef instead of withRef after [email protected]

class Form extends React.Component { ... }

// deprecated
const EnhancedForm = createForm({ withRef: true })(Form);
<EnhancedForm ref="form" />
this.refs.form.refs.wrappedComponent // => The instance of Form

// Recommended
const EnhancedForm = createForm()(Form);
<EnhancedForm wrappedComponentRef={(inst) => this.formRef = inst} />
this.formRef // => The instance of Form

(WrappedComponent: React.Component) => React.Component

The returned function of createForm(). It will pass an object as prop form with the following members to WrappedComponent:

getFieldProps(name, option): Object { [valuePropName], [trigger], [validateTrigger] }

Will create props which can be set on a input/InputComponent which support value and onChange interface.

After set, this will create a binding with this input.

<form>
  <input {...getFieldProps('name', { ...options })} />
</form>

name: String

This input's unique name.

option: Object

Option	Description	Type	Default
option.valuePropName	Prop name of component's value field, eg: checkbox should be set to `checked` ...	String	'value'
option.getValueProps	Get the component props according to field value.	(value): Object	(value) => ({ value })
option.getValueFromEvent	Specify how to get value from event.	(e): any	See below
option.initialValue	Initial value of current component.	any	-
option.normalize	Return normalized value.	(value, prev, all): Object	-
option.trigger	Event which is listened to collect form data.	String	'onChange'
option.validateTrigger	Event which is listened to validate. Set to falsy to only validate when call props.validateFields.	String	String[]
option.rules	Validator rules. see: async-validator	Object[]	-
option.validateFirst	Whether stop validate on first rule of error for this field.	boolean	false
option.validate		Object[]	-
option.validate[n].trigger	Event which is listened to validate. Set to falsy to only validate when call props.validateFields.	String	String[]
option.validate[n].rules	Validator rules. see: async-validator	Object[]	-
option.hidden	Ignore current field while validating or gettting fields	boolean	false

Default value of `getValueFromEvent`

function defaultGetValueFromEvent(e) {
  if (!e || !e.target) {
    return e;
  }
  const { target } = e;
  return target.type === 'checkbox' ? target.checked : target.value;
}

Tips

{
  validateTrigger: 'onBlur',
  rules: [{required: true}],
}
// is the shorthand of
{
  validate: [{
    trigger: 'onBlur',
    rules: [required: true],
  }],
}

getFieldDecorator(name:String, option: Object) => (React.Node) => React.Node

Similar to getFieldProps, but add some helper warnings and you can write onXX directly inside React.Node props:

<form>
  {getFieldDecorator('name', otherOptions)(<input />)}
</form>

getFieldsValue([fieldNames: String[]])

Get fields value by fieldNames.

getFieldValue(fieldName: String)

Get field value by fieldName.

getFieldInstance(fieldName: String)

Get field react public instance by fieldName.

setFieldsValue(obj: Object)

Set fields value by kv object.

setFieldsInitialValue(obj: Object)

Set fields initialValue by kv object. use for reset and initial display/value.

setFields(obj: Object)

Set fields by kv object. each field can contain errors and value member.

validateFields([fieldNames: String[]], [options: Object], callback: (errors, values) => void)

Validate and get fields value by fieldNames.

options is the same as validate method of async-validator.
And add force and scroll. scroll is the same as dom-scroll-into-view's function parameter config.

options.force: Boolean

Defaults to false. Whether to validate fields which have been validated(caused by validateTrigger).

getFieldsError(names): Object{ [name]: String[] }

Get inputs' validate errors.

getFieldError(name): String[]

Get input's validate errors.

isFieldValidating(name: String): Bool

Whether this input is validating.

isFieldsValidating(names: String[]): Bool

Whether one of the inputs is validating.

isFieldTouched(name: String): Bool

Whether this input's value had been changed by user.

isFieldsTouched(names: String[]): Bool

Whether one of the inputs' values had been changed by user.

resetFields([names: String[]])

Reset specified inputs. Defaults to all.

isSubmitting(): Bool (Deprecated)

Whether the form is submitting.

submit(callback: Function) (Deprecated)

Cause isSubmitting to return true, after callback called, isSubmitting return false.

rc-form/lib/createDOMForm(option): Function

createDOMForm enhancement, support props.form.validateFieldsAndScroll

validateFieldsAndScroll([fieldNames: String[]], [options: Object], callback: (errors, values) => void)

props.form.validateFields enhancement, support scroll to the first invalid form field

options.container: HTMLElement

Defaults to first scrollable container of form field(until document).

Notes

Do not use stateless function component inside Form component: https://github.com/facebook/react/pull/6534
you can not set same prop name as the value of validateTrigger/trigger for getFieldProps

<input {...getFieldProps('change',{
  onChange: this.iWantToKnow // you must set onChange here or use getFieldDecorator to write inside <input>
})}>

you can not use ref prop for getFieldProps

<input {...getFieldProps('ref')} />

this.props.form.getFieldInstance('ref') // use this to get ref

<input {...getFieldProps('ref',{
  ref: this.saveRef // use function here or use getFieldDecorator to write inside <input> (only allow function)
})} />

Test Case

npm test
npm run chrome-test

Coverage

npm run coverage

open coverage/ dir