README

@uform/react

@uform/react is based on react and @uform/core is already built in. It provide API to manuplate form state and components for rendering support. it mainly includes:

Form

Field

VirtualField

FormaSpy

FormProvider

FormConsumer(deprecated，pls using FormSpy)

createFormActions (create sync API to manuplate form state)

createAsyncFormActions (create async API to manuplate form state)

FormEffectHooks (LifeCycles Hook)

Install

npm install --save @uform/react

Usage
Components
Hook
API
Interfaces

Usage

Quick Start

import React from 'react'
import ReactDOM from 'react-dom'
import {
  Form,
  Field,
  FormPath,
  createFormActions,
  FormSpy,
  FormProvider,
  FormConsumer,
  FormEffectHooks
} from '@uform/react'

const { onFormInit$, onFormInputChange$, onFieldInputChange$ } = FormEffectHooks
const actions = createFormActions()
const App = () => {
  return (
    <Form
      actions={actions}
      effects={() => {
        onFormInit$().subscribe(() => {
          console.log('initialized')
        })
        onFieldInputChange$().subscribe(state => {
          console.log('field change', state)
        })
      }}
      onChange={() => {}}
    >
      <React.Fragment>
        <label>username: </label>
        <Field name="username">
          {({ state, mutators }) => (
            <React.Fragment>
              <input
                disabled={!state.editable}
                value={state.value || ''}
                onChange={mutators.change}
                onBlur={mutators.blur}
                onFocus={mutators.focus}
              />
              {state.errors}
              {state.warnings}
            </React.Fragment>
          )}
        </Field>
      </React.Fragment>
    </Form>
  )
}
ReactDOM.render(<App />, document.getElementById('root'))

Basic Field

Example：Show you how to bind the <input> field and subsequent examples are based on this field

const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => (
      <div>
        <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        />
        {state.errors}
        {state.warnings}
      </div>
    )}
  </Field>
)

Validation

Example：required validation + error type validation + warning type validation + custom validation The type of rules is ValidatePatternRules which is InternalFormats | CustomValidator | ValidateDescription | ValidateArrayRules

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions } from '@uform/react'

const actions = createFormActions()
const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => (
      <React.Fragment>
        <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        />
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    )}
  </Field>
)

const App = () => {
  return (
    <Form actions={actions}>
      <h5>required validation</h5>
      <span>username</span>
      <InputField name="username" required />

      <h5>error type validation</h5>
      <span>age</span>
      <InputField
        name="age"
        rules={[
          val =>
            !val
              ? { type: 'error', message: 'age is required' }
              : undefined
        ]}
      />

      <h5>warning type validation</h5>
      <span>gender</span>
      <InputField
        name="gender"
        rules={[
          val =>
            !val
              ? { type: 'warning', message: 'gender is required' }
              : undefined
        ]}
      />

      <h5>built-in validation default to error type validation</h5>
      <span>id</span>
      <InputField
        name="id"
        rules={[
          {
            format: 'number',
            message: 'id is not a number.'
          }
        ]}
      />

      <h5>custom validation</h5>
      <span>verifyCode</span>
      <InputField
        name="verifyCode"
        rules={[
          {
            validator(value) {
              return !value
                ? 'This field can not be empty, please enter {{scope.outerVariable}}'
                : undefined
            },
            scope: {
              outerVariable: '456'
            }
          },

          {
            validator(value) {
              return value === '456'
                ? { type: 'error', message: 'This field can not be 456' }
                : undefined
            }
          }
        ]}
      />

      <div>
        <button
          onClick={() => {
            const result = actions.validate()
            console.log(actions.getFormState(state => state.values))
            result.then(validateResp => {
              console.log(validateResp)
            })
          }}
        >
          validate
        </button>
      </div>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

Object Field

Example：User info user(username, age)

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions } from '@uform/react'

const actions = createFormActions()
const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => (
      <React.Fragment>
        <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        />
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    )}
  </Field>
)

const App = () => {
  return (
    <Form actions={actions}>
      <span>user</span>
      <Field
        name="user"
        initialValue={{
          username: undefined,
          age: undefined
        }}
      >
        {({ state, mutators }) => {
          return (
            <React.Fragment>
              {Object.keys(state.value).map(key => {
                if (!mutators.exist(key)) return

                return (
                  <div key={key}>
                    <span>{key}</span>
                    <InputField name={`user.${key}`} />
                    <button
                      onClick={() => {
                        mutators.remove(key)
                      }}
                    >
                      x
                    </button>
                  </div>
                )
              })}
              <button
                onClick={() => {
                  mutators.change({
                    ...state.value,
                    [new Date().getTime()]: new Date().getTime()
                  })
                }}
              >
                +
              </button>
              <button
                onClick={() => {
                  console.log(
                    'values',
                    actions.getFormState(state => state.values)
                  )
                }}
              >
                print
              </button>
            </React.Fragment>
          )
        }}
      </Field>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

ArrayField

Example：Id list

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions } from '@uform/react'

const actions = createFormActions()
const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => (
      <React.Fragment>
        <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        />
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    )}
  </Field>
)

const App = () => {
  return (
    <Form actions={actions}>
      <Field name="idList" initialValue={['1', '2', '3']}>
        {({ state, mutators }) => {
          return (
            <React.Fragment>
              {state.value.map((item, index) => {
                return (
                  <div key={index}>
                    <InputField name={`idList[${index}]`} />
                    <button onClick={() => mutators.remove(index)}>
                      Remove
                    </button>
                  </div>
                )
              })}
              <button onClick={() => mutators.push()}>Add Item</button>
            </React.Fragment>
          )
        }}
      </Field>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

ArrayField<Object>

Example：User list

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions } from '@uform/react'

const actions = createFormActions()
const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => (
      <React.Fragment>
        <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        />
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    )}
  </Field>
)

const App = () => {
  return (
    <Form actions={actions}>
      <Field
        name="userList"
        initialValue={[
          { username: 'bobby', age: 21 },
          { username: 'lily', age: 20 }
        ]}
      >
        {({ state, mutators }) => {
          return (
            <React.Fragment>
              {state.value.map((item, index) => {
                return (
                  <div key={index}>
                    <Field name={`userList[${index}]`} initialValue={{}}>
                      {({ state: innerState, mutators: innerMutator }) => {
                        return (
                          <React.Fragment>
                            {Object.keys(innerState.value).map(key => {
                              if (!innerMutator.exist(key)) return
                              return (
                                <React.Fragment key={key}>
                                  <InputField
                                    name={`userList[${index}].${key}`}
                                  />
                                  <button
                                    onClick={() => {
                                      innerMutator.remove(key)
                                    }}
                                  >
                                    x
                                  </button>
                                </React.Fragment>
                              )
                            })}
                            <button
                              onClick={() => {
                                innerMutator.change({
                                  ...innerState.value,
                                  [new Date().getTime()]: new Date().getTime()
                                })
                              }}
                            >
                              +
                            </button>
                          </React.Fragment>
                        )
                      }}
                    </Field>

                    <button onClick={() => mutators.remove(index)}>
                      Remove
                    </button>
                  </div>
                )
              })}
              <button
                onClick={() =>
                  mutators.push({
                    username: undefined,
                    age: undefined
                  })
                }
              >
                Add Item
              </button>
              <button
                onClick={() =>
                  console.log(actions.getFormState(state => state.values))
                }
              >
                print
              </button>
            </React.Fragment>
          )
        }}
      </Field>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

display visible

Example: see how display 与 visible affect values

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, LifeCycleTypes, FormSpy } from '@uform/react'

const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)

const CheckedField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input type="checkbox" onChange={() => {
            mutators.change(!state.value)
          }} checked={!!state.value} /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)

const actions = createFormActions()
const App = () => {
  return (
    <Form
      actions={actions}
      effects={($, { validate, setFieldState }) => {
        $(LifeCycleTypes.ON_FORM_INIT).subscribe(() => {
          setFieldState('displayTrigger', state => state.value = true)
          setFieldState('visibleTrigger', state => state.value = true)
          setFieldState('a', state => state.value = 1)
          setFieldState('b', state => state.value = 2)
        })

        $(LifeCycleTypes.ON_FIELD_VALUE_CHANGE, 'visibleTrigger').subscribe((fieldState) => {
          setFieldState('a', state => {
            state.visible = fieldState.value
          })
        })

        $(LifeCycleTypes.ON_FIELD_VALUE_CHANGE, 'displayTrigger').subscribe((fieldState) => {
          setFieldState('b', state => {
            state.display = fieldState.value
          })
        })
      }}
    >
      <div>
      <CheckedField label="visible" name="visibleTrigger"/>

      <InputField name="a" label="a" />
      </div>
      <div>
        <CheckedField label="display" name="displayTrigger"/>
      <InputField name="b" label="b" />
      </div>

      <FormSpy>
        {({ state, form }) => {
          return (<div>
            {JSON.stringify(form.getFormState(state => state.values))}
          </div>)
        }}
      </FormSpy>


      <button
        onClick={() =>
          console.log(actions.getFormState(state => state.values))
        }
      >
        print
      </button>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

Linkage

Example：Show/hide field and modified props/value by using effects

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, LifeCycleTypes } from '@uform/react'

const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)

const CheckedField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input type="checkbox" onChange={() => {
            mutators.change(!state.value)
          }} checked={!!state.value} /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)

const actions = createFormActions()
const App = () => {
  return (
    <Form
      actions={actions}
      effects={($, { setFieldState }) => {
        $(LifeCycleTypes.ON_FORM_INIT).subscribe(() => {
          setFieldState('a~', state => state.visible = false)
        })

        $(LifeCycleTypes.ON_FIELD_VALUE_CHANGE, 'trigger').subscribe((triggerState) => {
          setFieldState('a~', state => {
            state.visible = triggerState.value
          })
        })

        $(LifeCycleTypes.ON_FIELD_VALUE_CHANGE, 'a').subscribe((fieldState) => {
          setFieldState('a-copy', state => {
            state.value = fieldState.value
          })
        })
      }}
    >
      <CheckedField name="trigger" label="show/hide" />
      <div>
        <InputField label="a" name="a" />
      </div>
      <div>
        <InputField label="a-copy" name="a-copy" />
      </div>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

Async Linkage

Example：Change dataSource in select asynchronously by effects

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, LifeCycleTypes } from '@uform/react'

const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)
const CheckedField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input type="checkbox" onChange={() => {
            mutators.change(!state.value)
          }} checked={!!state.value} /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)

const SelectField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const { loading, dataSource = [] } = state.props
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <select
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        >
          {dataSource.map(item => (<option value ={item.value}>{item.label}</option>))}
        </select>}
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)

const actions = createFormActions()
const App = () => {
  return (
    <Form
      actions={actions}
      effects={($, { setFieldState }) => {
        $(LifeCycleTypes.ON_FIELD_VALUE_CHANGE, 'trigger').subscribe((fieldState) => {
            const dataSource = [{ label: 'aa', value: 'aa' }, { label: 'bb', value: 'bb' } ]
            setFieldState('sync-source', state => {
              state.props.dataSource = fieldState.value ? dataSource : []
            })
            setFieldState('async-source', state => {
              state.props.loading = true
            })

            setTimeout(() => {
              setFieldState('async-source', state => {
                state.props.loading = false
                state.props.dataSource = fieldState.value ? dataSource : []
              })
            }, 300)
        })
      }}
    >
      <CheckedField name="trigger" label="show/reset dataSource" />
      <div>
        <SelectField label="sync-source" name="sync-source" />
      </div>
      <div>
        <SelectField label="async-source" name="async-source" />
      </div>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

Linkage Validation

Example：validation when form mounted and re-trigger validation when field change

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, LifeCycleTypes } from '@uform/react'

const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)

const actions = createFormActions()
const App = () => {
  return (
    <Form
      actions={actions}
      effects={($, { validate, setFieldState }) => {
        $(LifeCycleTypes.ON_FORM_MOUNT).subscribe(() => {
          validate()
        })

        $(LifeCycleTypes.ON_FIELD_VALUE_CHANGE, 'a').subscribe((fieldState) => {
          setFieldState('a-copy', state => {
            state.value = fieldState.value
          })
        })
      }}
    >
      <InputField label="a" name="a" />
      <div>
        <InputField label="a-copy" name="a-copy" required/>
      </div>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

Complex Linkage

Example：See how ArrayField communicate with other field by using effects

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, LifeCycleTypes } from '@uform/react'

const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)

const actions = createFormActions()
const App = () => {
  return (
    <Form
      actions={actions}
      effects={($, { validate, setFieldState }) => {
        $(LifeCycleTypes.ON_FORM_INIT).subscribe(() => {
          setFieldState('userList.*.username', state => {
            state.visible = false
          })
        })

        $(LifeCycleTypes.ON_FIELD_VALUE_CHANGE, 'trigger').subscribe((fieldState) => {
          setFieldState('userList.*.username', state => {
            state.visible = fieldState.value
          })
        })
      }}
    >
      <div>
      <Field name="trigger" label="show/hide username">
        {({ state, mutators }) => {
          return <input type="checkbox" onChange={mutators.change} checked={state.value ? 'checked' : undefined } />
        }}
      </Field>
      </div>
      <div>
        <Field initialValue={[
          { username: 'bobby', age: 22 },
          { username: 'lily', age: 21 }
        ]} name="userList">
          {({ state, mutators }) => {
          return (
            <React.Fragment>
              {state.value.map((item, index) => {
                return (
                  <div key={index}>
                    <Field name={`userList[${index}]`} initialValue={{}}>
                      {({ state: innerState, mutators: innerMutator }) => {
                        return (
                          <React.Fragment>
                            {Object.keys(innerState.value).map(key => {
                              if (!innerMutator.exist(key)) return
                              return (
                                <React.Fragment key={key}>
                                  <InputField
                                    label={key}
                                    name={`userList[${index}].${key}`}
                                  />
                                </React.Fragment>
                              )
                            })}
                            <button
                              onClick={() => {
                                innerMutator.change({
                                  ...innerState.value,
                                  [new Date().getTime()]: new Date().getTime()
                                })
                              }}
                            >
                              +
                            </button>
                          </React.Fragment>
                        )
                      }}
                    </Field>

                    <button onClick={() => mutators.remove(index)}>
                      Remove
                    </button>
                  </div>
                )
              })}
              <button
                onClick={() =>
                  mutators.push({
                    username: undefined,
                    age: undefined
                  })
                }
              >
                Add Item
              </button>
              <button
                onClick={() =>
                  console.log(actions.getFormState(state => state.values))
                }
              >
                print
              </button>
            </React.Fragment>
          )
        }}
        </Field>
      </div>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

Reuse Effects

Make your own reusable effects.

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, FormEffectHooks } from '@uform/react'


const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)
const CheckedField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input type="checkbox" onChange={() => {
            mutators.change(!state.value)
          }} checked={!!state.value} /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)

const { onFormMount$, onFieldValueChange$  } = FormEffectHooks
const getEffects = ()=>{
   const actions = createFormActions()
   onFormMount$().subscribe(() => {
      actions.setFieldState('a~', state => state.visible = false)
    })

    onFieldValueChange$('trigger').subscribe((triggerState) => {
      actions.setFieldState('a~', state => {
        state.visible = triggerState.value
      })
    })

    onFieldValueChange$('a').subscribe((fieldState) => {
      actions.setFieldState('a-copy', state => {
        state.value = fieldState.value
      })
    })
}

const actions = createFormActions()
const App = () => {
  return (
    <Form
      actions={actions}
      effects={() => {
        getEffects()
      }}
    >
      <CheckedField name="trigger" label="show/hide" />
      <div>
        <InputField label="a" name="a" />
      </div>
      <div>
        <InputField label="a-copy" name="a-copy" />
      </div>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

Combo

Example：Combo value of username and age. Check FormSpy for more inforation.

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, FormSpy } from '@uform/react'

const actions = createFormActions()
const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => (
      <React.Fragment>
        <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        />
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    )}
  </Field>
)

const App = () => {
  return (
    <Form actions={actions}>
      <label>username</label>
      <InputField name="username" />
      <label>age</label>
      <InputField name="age" />
      <FormSpy>
        {({ state, form }) => {
          return (
            <div>
              name: {form.getFieldValue('username')}
              <br />
              age: {form.getFieldValue('age')}
            </div>
          )
        }}
      </FormSpy>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

Provide and FormSpy

Dictionary
--app
  |---components
  |---customForm

Example：Cross-file consumption form state, Check FormProvider and FormSpy for more infomation.

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, FormSpy, FormProvider } from '@uform/react'

const actions = createFormActions()
const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => (
      <React.Fragment>
        <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        />
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    )}
  </Field>
)

const CustomForm = () => {
  return (
    <Form actions={actions}>
      <label>username</label>
      <InputField name="username" />
      <label>age</label>
      <InputField name="age" />
    </Form>
  )
}

const App = () => {
  return (
    <FormProvider>
      <CustomForm />
      <FormSpy>
        {({ state, form }) => {
          return (
            <div>
              name: {form.getFieldValue('username')}
              <br />
              age: {form.getFieldValue('age')}
            </div>
          )
        }}
      </FormSpy>
    </FormProvider>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

Deconstruction

import React, { useState } from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, FormSpy, FormPath } from '@uform/react'

const actions = createFormActions()

const App = () => {
  return (
    <Form actions={actions} >
      <label>range input</label>
      <Field name="[start,end]">
        {({ state, mutators }) => {

          const [start, end] = state.value
          return <div>
            <label>start</label>
            <input value={start} onChange={(e) => {
              mutators.change([e.target.value, end])
            }} />
            <label>end</label>
            <input value={end} onChange={(e) => {
              mutators.change([start, e.target.value])
            }} />
          </div>
        }}
      </Field>
      <button onClick={() => {
        actions.setFormState(state => {
          state.values = { start: 'x', end: 'y' }
        })
      }}>set value</button>
      <FormSpy>
        {({ state, form }) => {
          return (<div>
            Form values:
            <code>
              <pre>
                {JSON.stringify(form.getFormState(state => state.values), null, 2)}
              </pre>
            </code>
          </div>)
        }}
      </FormSpy>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

Complex Deconstruction

import React, { useState } from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, FormSpy, FormPath } from '@uform/react'

const actions = createFormActions()
const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)


const App = () => {
  return (
    <Form actions={actions} >
      <Field name="{aa:{bb:{cc:destructor1,dd:[destructor2,destructor3],ee}}}">
        {({ state, mutators }) => {
          return <div>
            <button
              onClick={() => {
                mutators.change({
                  aa: {
                    bb: {
                      cc: 123,
                      dd: [333, 444],
                      ee: 'abcde'
                    }
                  }
                })
              }}
            >
              set value
            </button>
            <div>Field value:</div>
            <code>
              <pre>{JSON.stringify(state.value, null, 2)}</pre>
            </code>
          </div>
        }}
      </Field>
      <button onClick={() => {
        actions.setFieldState(FormPath.match('[[{aa:{bb:{cc:destructor1,dd:\\[destructor2,destructor3\\],ee}}}]]'), state => {
          state.value = {
            aa: {
              bb: {
                cc: 'a',
                dd: ['b', 'c'],
                ee: 'd'
              }
            }
          }
        })
      }}>
        outside set
      </button>
      <FormSpy>
        {({ state, form }) => {
          return (<div>
            Form values:
            <code>
              <pre>
                {JSON.stringify(form.getFormState(state => state.values), null, 2)}
              </pre>
            </code>
          </div>)
        }}
      </FormSpy>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

Components

`<Form/>`

<Form> Props

interface IFormProps {
  // Form value
  value?: any
  defaultValue?: any // Form initial value
  initialValues?: any
  // formAPI
  actions?: IFormActions | IFormAsyncActions
  // effect
  effects?: IFormEffect<any, IFormActions | IFormAsyncActions>
  // IForm instance
  form?: IForm // Form change event callback
  onChange?: (values: Value) => void // Form submission event callback
  onSubmit?: (values: Value) => void | Promise<Value> // Form reset event callback
  onReset?: () => void // Form verification failure event callback
  onValidateFailed?: (valideted: IFormValidateResult) => void
  children?: React.ReactElement | ((form: IForm) => React.ReactElement)
  // Whether to use the dirty check, the default will go immer accurate update
  useDirty?: boolean
  // Is it editable, overall control in the Form dimension
  editable?: boolean
  // Whether to go pessimistic check, stop the subsequent check when the first check fails
  validateFirst?: boolean
}

`<Field/>`

<Field> Props

interface IFieldStateUIProps {
  // Node path
  path?: FormPathPattern // Node path
  nodePath?: FormPathPattern // Data path
  dataPath?: FormPathPattern // Data path
  name?: string // Field value, is equal to values[0]
  value?: any // Field multi-parameter value, such as when the field onChange trigger, the event callback passed multi-parameter data, then the value of all parameters will be stored here
  values?: any[] // Initial value

  initialValue?: any // field extension properties
  visible?: boolean //Field initial visible status(Whether the data and style is visible)
  display?: boolean //Field initial display status(Whether the style is visible)
  props?: FieldProps // Check the rules, the specific type description refers to the following documents
  rules?: ValidatePatternRules[] // Is it required?
  required?: boolean // Is it editable?
  editable?: boolean // Whether to use the dirty check, the default will go immer accurate update
  useDirty?: boolean
  // Field state calculation container, mainly used to extend the core linkage rules
  computeState?: (draft: IFieldState, prevState: IFieldState) => void
  // type of trigger validation
  triggerType?: 'onChange' | 'onBlur'
  // get value from browser event(eg. e.target.value)
  getValueFromEvent?: (...args: any[]) => any
  children?: React.ReactElement | ((api: IFieldAPI) => React.ReactElement)
}

Usage

Example：All type of field

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions } from '@uform/react'

const actions = createFormActions()
const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => (
      <React.Fragment>
        <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        />
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    )}
  </Field>
)

const App = () => {
  return (
    <Form actions={actions}>
      <div>
        <h5>Basic Field</h5>
        <Field name="id">
          {({ state, mutator }) => {
            return <input value={state.value} onChange={mutator} />
          }}
        </Field>
      </div>

      <div>
        <h5>Object Field</h5>
        <Field
          name="user"
          initialValue={{
            username: undefined,
            age: undefined
          }}
        >
          {({ state, mutators }) => {
            return (
              <React.Fragment>
                {Object.keys(state.value).map(key => {
                  if (!mutators.exist(key)) return

                  return (
                    <div key={key}>
                      <span>{key}</span>
                      <InputField name={`user.${key}`} />
                      <button
                        onClick={() => {
                          mutators.remove(key)
                        }}
                      >
                        x
                      </button>
                    </div>
                  )
                })}
                <button
                  onClick={() => {
                    mutators.change({
                      ...state.value,
                      [new Date().getTime()]: new Date().getTime()
                    })
                  }}
                >
                  +
                </button>
              </React.Fragment>
            )
          }}
        </Field>
      </div>

      <div>
        <h5>ArrayField Field</h5>
        <Field name="idList" initialValue={['1', '2', '3']}>
          {({ state, mutators }) => {
            return (
              <React.Fragment>
                {state.value.map((item, index) => {
                  return (
                    <div key={index}>
                      <InputField name={`idList[${index}]`} />
                      <button onClick={() => mutators.remove(index)}>
                        Remove
                      </button>
                    </div>
                  )
                })}
                <button onClick={() => mutators.push()}>Add Item</button>
              </React.Fragment>
            )
          }}
        </Field>
      </div>

      <div>
        <h5>ArrayObject Field</h5>
        <Field
          name="userList"
          initialValue={[
            { username: 'bobby', age: 21 },
            { username: 'lily', age: 20 }
          ]}
        >
          {({ state, mutators }) => {
            return (
              <React.Fragment>
                {state.value.map((item, index) => {
                  return (
                    <div key={index}>
                      <Field name={`userList[${index}]`} initialValue={{}}>
                        {({ state: innerState, mutators: innerMutator }) => {
                          return (
                            <React.Fragment>
                              {Object.keys(innerState.value).map(key => {
                                if (!innerMutator.exist(key)) return
                                return (
                                  <React.Fragment key={key}>
                                    <InputField
                                      name={`userList[${index}].${key}`}
                                    />
                                    <button
                                      onClick={() => {
                                        innerMutator.remove(key)
                                      }}
                                    >
                                      x
                                    </button>
                                  </React.Fragment>
                                )
                              })}
                              <button
                                onClick={() => {
                                  innerMutator.change({
                                    ...innerState.value,
                                    [new Date().getTime()]: new Date().getTime()
                                  })
                                }}
                              >
                                +
                              </button>
                            </React.Fragment>
                          )
                        }}
                      </Field>

                      <button onClick={() => mutators.remove(index)}>
                        Remove
                      </button>
                    </div>
                  )
                })}
                <button
                  onClick={() =>
                    mutators.push({
                      username: undefined,
                      age: undefined
                    })
                  }
                >
                  Add Item
                </button>
              </React.Fragment>
            )
          }}
        </Field>


      </div>
      <button
        onClick={() =>
          console.log(actions.getFormState(state => state.values))
        }
      >
        print
      </button>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

`<VirtualField/>`

<VirtualField> Props

interface IVirtualFieldProps {
  // Node path
  path?: FormPathPattern // Node path
  nodePath?: FormPathPattern // Data path
  dataPath?: FormPathPattern // Data path
  visible?: boolean //Field initial visible status(Whether the data and style is visible)
  display?: boolean //Field initial display status(Whether the style is visible)
  name?: string // Form extension properties
  props?: FieldProps // Whether to use the dirty check, the default will go immer accurate update
  useDirty?: boolean
  // Field state calculation container, mainly used to extend the core linkage rules
  computeState?: (draft: IFieldState, prevState: IFieldState) => void
  children?: React.ReactElement | ((api: IFieldAPI) => React.ReactElement)
}

Usage

Example：Setting <Layout> size from 100x100 to 200x200

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, VirtualField } from '@uform/react'

const actions = createFormActions()
const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => (
      <React.Fragment>
        <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        />
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    )}
  </Field>
)

const Layout = ({ children, width = '100px', height = '100px' }) => {
  return (
    <div style={{ border: '1px solid #999', width, height }}>{children}</div>
  )
}

const App = () => {
  return (
    <Form actions={actions}>
      <Field name="user" initialValue={{}}>
        {({ state, mutator }) => {
          return (
            <VirtualField name="user.layout">
              {({ state: layoutState }) => {
                return (
                  <Layout
                    width={layoutState.props.width}
                    height={layoutState.props.height}
                  >
                    <label>username</label>
                    <InputField name="username" />
                    <label>age</label>
                    <InputField name="age" />
                  </Layout>
                )
              }}
            </VirtualField>
          )
        }}
      </Field>

      <button
        onClick={() => {
          // some where dynamic change layout's props
          actions.setFieldState('user.layout', state => {
            state.props.width = '200px'
            state.props.height = '200px'
          })
        }}
      >
        change layout
      </button>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

`<FormSpy/>`

<FormSpy> Props

interface IFormSpyProps {
  // selector, eg: [ LifeCycleTypes.ON_FORM_SUBMIT_START, LifeCycleTypes.ON_FORM_SUBMIT_END ]
  selector?: string[] | string
  // reducer
  reducer?: (
    state: any,
    action: { type: string; payload: any },
    form: IForm
  ) => any
  children?: React.ReactElement | ((api: IFormSpyAPI) => React.ReactElement)
}

Usage

Example1： Form state change counter

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, FormSpy, LifeCycleTypes } from '@uform/react'

const actions = createFormActions()
const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => (
      <React.Fragment>
        <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        />
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    )}
  </Field>
)

const App = () => {
  return (
    <Form actions={actions}>
      <label>username</label>
      <InputField name="username" />
      <label>age</label>
      <InputField name="age" />
      <FormSpy
        selector={LifeCycleTypes.ON_FORM_VALUES_CHANGE}
        reducer={(state, action, form) => ({
          count: state.count ? state.count + 1 : 1
        })}
      >
        {({ state, type, form }) => {
          return <div>count: {state.count || 0}</div>
        }}
      </FormSpy>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

Example2：Combo

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, FormSpy } from '@uform/react'

const actions = createFormActions()
const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => (
      <React.Fragment>
        <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        />
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    )}
  </Field>
)

const App = () => {
  return (
    <Form actions={actions}>
      <label>username</label>
      <InputField name="username" />
      <label>age</label>
      <InputField name="age" />
      <FormSpy>
        {({ state, form }) => {
          return (
            <div>
              name: {form.getFieldValue('username')}
              <br />
              age: {form.getFieldValue('age')}
            </div>
          )
        }}
      </FormSpy>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

`<FormProvider/>`

Used with FormSpy, often used in Cross-file consumption form state

Usage

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, FormSpy, FormProvider } from '@uform/react'

const actions = createFormActions()
const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => (
      <React.Fragment>
        <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        />
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    )}
  </Field>
)

const CustomForm = () => {
  return (
    <Form actions={actions}>
      <label>username</label>
      <InputField name="username" />
      <label>age</label>
      <InputField name="age" />
    </Form>
  )
}

const App = () => {
  return (
    <FormProvider>
      <CustomForm />
      <FormSpy>
        {({ state, form }) => {
          return (
            <div>
              name: {form.getFieldValue('username')}
              <br />
              age: {form.getFieldValue('age')}
            </div>
          )
        }}
      </FormSpy>
    </FormProvider>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

`<FormConsumer/>(deprecated，pls using <FormSpy/>)`

<FormConsumer> Props

interface IFormConsumerProps {
  // eg.[ LifeCycleTypes.ON_FORM_SUBMIT_START, LifeCycleTypes.ON_FORM_SUBMIT_END ]
  selector?: string[] | string
  children?:
    | React.ReactElement
    | ((api: IFormConsumerAPI) => React.ReactElement)
}

Hook

`useFormEffects`

Implement local effects by using useFormEffects. Same effect as the example of Linkage Note: The life cycle of the listener starts from ON_FORM_MOUNT

Signature

(effects: IFormEffect): void

import React from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, createFormActions, useFormEffects, LifeCycleTypes } from '@uform/react'

const actions = createFormActions()
const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)

const CheckedField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input type="checkbox" onChange={() => {
            mutators.change(!state.value)
          }} checked={!!state.value} /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)

const FormFragment = () => {
  useFormEffects(($, { setFieldState }) => {
    $(LifeCycleTypes.ON_FORM_INIT).subscribe(() => {
      setFieldState('a~', state => state.visible = false)
    })

    $(LifeCycleTypes.ON_FIELD_VALUE_CHANGE, 'trigger').subscribe((triggerState) => {
      setFieldState('a~', state => {
        state.visible = triggerState.value
      })
    })

    $(LifeCycleTypes.ON_FIELD_VALUE_CHANGE, 'a').subscribe((fieldState) => {
      setFieldState('a-copy', state => {
        state.value = fieldState.value
      })
    })
  })

  return (
    <React.Fragment>
      <CheckedField name="trigger" label="show/hide" />
      <div>
        <InputField label="a" name="a" />
      </div>
      <div>
        <InputField label="a-copy" name="a-copy" />
      </div>
    </React.Fragment>
  )
}

const App = () => {
  return (
    <Form
      actions={actions}
    >
      <FormFragment />
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

`useFormState`

使用 useFormState 为自定义组件提供FormState扩展和管理能力

签名

(defaultState: T): [state: IFormState, setFormState: (state?: IFormState) => void]

用法

import React, { useRef } from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, VirtualField,
  createFormActions, createEffectHook,
  useForm,
  useFormState,
  useFormEffects,
  useFieldState,
  LifeCycleTypes
} from '@uform/react'

const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)

const actions = createFormActions()
const FormFragment = (props) => {
  const [formState, setFormState ] = useFormState({ extendVar: 0 })
  const { extendVar } = formState

  return <div>
    <button onClick={() => {
      setFormState({ extendVar: extendVar + 1 })
    }}>add</button>
    <div>count: {extendVar}</div>
  </div>
}

const App = () => {
  return (
    <Form actions={actions}>
      <FormFragment />
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

`useFieldState`

Manage state of custom field by using useFieldState

Signature

(defaultState: T): [state: IFieldState, setFieldState: (state?: IFieldState) => void]

import React, { useRef } from 'react'
import ReactDOM from 'react-dom'
import { Form, Field, VirtualField,
  createFormActions, createEffectHook,
  useForm,
  useFormEffects,
  useFieldState,
  LifeCycleTypes
} from '@uform/react'

const InputField = props => (
  <Field {...props}>
    {({ state, mutators }) => {
      const loading = state.props.loading
      return <React.Fragment>
        { props.label && <label>{props.label}</label> }
        { loading ? ' loading... ' : <input
          disabled={!state.editable}
          value={state.value || ''}
          onChange={mutators.change}
          onBlur={mutators.blur}
          onFocus={mutators.focus}
        /> }
        <span style={{ color: 'red' }}>{state.errors}</span>
        <span style={{ color: 'orange' }}>{state.warnings}</span>
      </React.Fragment>
    }}
  </Field>
)

const changeTab$ = createEffectHook('changeTab')
const actions = createFormActions()
const TabFragment = (props) => {
  const [fieldState, setLocalFieldState ] = useFieldState({ current: 0 })
  const { current } = fieldState
  const { children, dataSource, form } = props
  const ref = useRef(current)

  const update = (cur) => {
    form.notify('changeTab', cur)
    setLocalFieldState({
      current: cur
    })
  }

  useFormEffects(($, { setFieldState }) => {
    dataSource.forEach((item, itemIdx) => {
      setFieldState(item.name, state => {
        state.display = itemIdx === current
      })
    })

    changeTab$().subscribe((idx) => {
      dataSource.forEach((item, itemIdx) => {
      setFieldState(item.name, state => {
        state.display = itemIdx === idx
      })
    })
    })
  })

  ref.current = current
  const btns = dataSource.map((item, idx) => {
    console.log('current', current, ref.current)
    const focusStyle = idx === current ? { color: '#fff', background: 'blue' } : {}
    return <button style={focusStyle} onClick={() => {
      update(idx)
    }}>{item.label}</button>
  })

  return btns
}

const FormTab = (props) => {
  return <VirtualField name="layout_tab">
    {({ form }) => {
      return <TabFragment {...props} form={form} />
    }}
  </VirtualField>
}

const App = () => {
  return (
    <Form actions={actions}>
      <FormTab dataSource={[
        { label: 'tab-1', name: 'username' },
        { label: 'tab-2', name: 'age' }
      ]} />
      <div>
        <InputField name="username" label="username"/>
        <InputField name="age" label="age"/>
      </div>
    </Form>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))

useForm

get IForm instance

Signature

type useForm = <
  Value = any,
  DefaultValue = any,
  EffectPayload = any,
  EffectAction = any
>(
  props: IFormProps<Value, DefaultValue, EffectPayload, EffectAction>
) => IForm

Usage

import { useForm } from '@uform/react'

const FormFragment = () => {
  const form = useForm()
  return <div>{form.getFieldValue('username')}</div>
}

useField

get IFieldHook instance

Signature

type useField = (options: IFieldStateUIProps): IFieldHook

Usage

import { useField } from '@uform/react'

const FormFragment = (props) => {
  const {
    form,
    state,
    props: fieldProps,
    mutators
  } = useField({ name: 'username' })

  return <input {...fieldProps} {...props} value={state.value} onChange={mutators.change} />
}

useVirtualField

get IVirtualFieldHook instance

Signature

type UseVirtualField = (options: IVirtualFieldStateProps): IVirtualFieldHook

Usage

import { UseVirtualField } from '@uform/react'

const FormFragment = (props) => {
  const {
    form,
    state,
    props: fieldProps,
  } = UseVirtualField({ name: 'username' })

  return <div style={{ width: fieldProps.width, height: fieldProps.height }}>
    {props.children}
  </div>
}

useFormSpy

get ISpyHook instance. Same effect as the first example of FormSpy.

Signature

type useFormSpy = (props: IFormSpyProps): ISpyHook

Usage

import { useFormSpy, LifeCycleTypes } from '@uform/react'
const FormFragment = (props) => {
  const {
    form,
    state,
    type,
  } = useFormSpy({
    selector: LifeCycleTypes.ON_FORM_VALUES_CHANGE,
    reducer: (state, action, form) => ({
      count: state.count ? state.count + 1 : 1
    })
  })

  return <div>
    <div>count: {state.count || 0}</div>
  </div>
}

API

The API is fully inherited from @uform/core. The specific API of @uform/react is listed below.

`createFormActions`

Return IFormActions

Signature

createFormActions(): IFormActions

Usage

import { createFormActions } from '@uform/react'

const actions = createFormActions()
console.log(actions.getFieldValue('username'))

`createAsyncFormActions`

Return IFormAsyncActions

Signature

createAsyncFormActions(): IFormAsyncActions

Usage

import { createAsyncFormActions } from '@uform/react'

const actions = createAsyncFormActions()
actions.getFieldValue('username').then(val => console.log(val))

`FormEffectHooks`

Return all @uform/core lifeCycles hook which can be subscribe

Usage

import { FormEffectHooks, Form } from '@uform/react'
const {
  /**
   * Form LifeCycle
   **/
  // Form pre-initialization trigger
  onFormWillInit$,
  // Form initialization trigger
  onFormInit$,
  // Triggered when the form changes
  onFormChange$,
  // Triggered when the form event is triggered, used to monitor only manual operations
  onFormInputChange$,
  // Trigger when the form initial value changes
  onFormInitialValueChange$,
  // Triggered when the form submission within validate
  onFormSubmitValidateStart$,
  // Triggered when the form submission within validate and successs
  onFormSubmitValidateSuccess$,
  // Triggered when the form submission within validate and faield
  onFormSubmitValidateFailed$,
  // Triggered when the form is reset
  onFormReset$,
  // Triggered when the form is submitted
  onFormSubmit$,
  // Triggered when the form submission starts
  onFormSubmitStart$,
  // Triggered when the form submission ends
  onFormSubmitEnd$,
  // Triggered when the form is mounted
  onFormMount$,
  // Triggered when the form is unloaded
  onFormUnmount$,
  // Triggered when form validation begins
  onFormValidateStart$,
  // Triggered when the form validation ends
  onFormValidateEnd$,
  // Trigger when the form initial value changes
  onFormValuesChange$,
  /**
   * FormGraph LifeCycle
   **/
  // Triggered when the form observer tree changes
  onFormGraphChange$,
  /**
   * Field LifeCycle
   **/
  // Triggered when pre-initialized
  onFieldWillInit$,
  // Triggered when the field is initialized
  onFieldInit$,
  // Triggered when the field changes
  onFieldChange$,
  // Triggered when the field is mounted
  onFieldMount$,
  //

Usage no npm install needed!

README

@uform/react

Install

Table Of Contents

Usage

Quick Start

Basic Field

Validation

Object Field

ArrayField

ArrayField<Object>

display visible

Linkage

Async Linkage

Linkage Validation

Complex Linkage

Reuse Effects

Combo

Provide and FormSpy

Deconstruction

Complex Deconstruction

Components

<Form/>

<Field/>

<VirtualField/>

<FormSpy/>

<FormProvider/>

<FormConsumer/>(deprecated，pls using <FormSpy/>)

Hook

useFormEffects

useFormState

useFieldState

useForm

useField

useVirtualField

useFormSpy

API

createFormActions

createAsyncFormActions

FormEffectHooks

`<Form/>`

`<Field/>`

`<VirtualField/>`

`<FormSpy/>`

`<FormProvider/>`

`<FormConsumer/>(deprecated，pls using <FormSpy/>)`

`useFormEffects`

`useFormState`

`useFieldState`

`createFormActions`

`createAsyncFormActions`

`FormEffectHooks`