| Property | Description | Type | Default | Version |
| --- | --- | --- | --- | --- |
| component | Set the Form rendering element. Do not create a DOM node for `false` | ComponentType \| false | form | |
| colon | Configure the default value of `colon` for Form.Item. Indicates whether the colon after the label is displayed (only effective when prop layout is horizontal) | boolean | true | |
| fields | Control of form fields through state management (such as redux). Not recommended for non-strong demand. View [example](#components-form-demo-global-state) | [FieldData](#FieldData)\[] | - | |
| form | Form control instance created by `Form.useForm()`. Automatically created when not provided | [FormInstance](#FormInstance) | - | |
| hideRequiredMark | Hide required mark for all form items | boolean | false | |
| initialValues | Set value by Form initialization or reset | object | - | |
Form provides [default verification error messages](https://github.com/react-component/field-form/blob/master/src/utils/messages.ts). You can modify the template by configuring `validateMessages` property. A common usage is to configure localization:
Besides, [ConfigProvider](/components/config-provider/) also provides a global configuration scheme that allows for uniform configuration error notification templates:
| extra | The extra prompt message. It is similar to help. Usage example: to display error message and prompt message at the same time | string \| ReactNode | - | |
| hasFeedback | Used with `validateStatus`, this option specifies the validation status icon. Recommended to be used only with `Input` | boolean | false | |
| labelCol | The layout of label. You can set `span``offset` to something like `{span: 3, offset: 12}` or `sm: {span: 3, offset: 12}` same as with `<Col>`. You can set `labelCol` on Form. If both exists, use Item first | [object](/components/grid/#Col) | - | |
| name | Field name, support array | [NamePath](#NamePath) | - | |
| validateStatus | The validation status. If not provided, it will be generated by validation rule. options: `success``warning``error``validating` | string | - | |
| validateTrigger | When to validate the value of children node | string \| string[] | `onChange` | |
| valuePropName | Props of children node, for example, the prop of Switch is 'checked'. This prop is an encapsulation of `getValueProps`, which will be invalid after customizing `getValueProps` | string | `value` | |
| wrapperCol | The layout for input controls, same as `labelCol`. You can set `wrapperCol` on Form. If both exists, use Item first | [object](/components/grid/#Col) | - | |
After wrapped by `Form.Item` with `name` property, `value`(or other property defined by `valuePropName`) `onChange`(or other property defined by `trigger`) props will be added to form controls, the flow of form data will be handled by Form which will cause:
1. You shouldn't use `onChange` on each form control to **collect data**(use `onValuesChange` of Form), but you can still listen to `onChange`.
2. You cannot set value for each form control via `value` or `defaultValue` prop, you should set default value with `initialValues` of Form. Note that `initialValues` cannot be updated by `setState` dynamiclly, you should use `setFieldsValue` in that situation.
3. You shouldn't call `setState` manually, please use `form.setFieldsValue` to change value programmatically.
Used when there are dependencies between fields. If a field has the `dependencies` prop, this field will automatically trigger updates and validations when upstream is updated. A common scenario is a user registration form with "password" and "confirm password" fields. The "Confirm Password" validation depends on the "Password" field. After setting `dependencies`, the "Password" field update will re-trigger the validation of "Check Password". You can refer [examples](#components-form-demo-register).
Form updates only the modified field-related components for performance optimization purposes by incremental update. In most cases, you only need to write code or do validation with the [`dependencies`](#dependencies) property. In some specific cases, such as when a new field option appears with a filed value changed, or you just want to keep some area updating by form update, you can modify the update logic of Form.Item via the `shouldUpdate`.
When `shouldUpdate` is a function, it will be called by form values update. Providing original values and current value to compare. This is very helpful for rendering additional fields based on values:
Provide linkage between forms. If a sub form with `name` prop update, it will auto trigger Provider related events. See [example](#components-form-demo-form-context).
| getFieldInstance | Get field instance | (name: [NamePath](#NamePath)) => any | 4.4.0 |
| getFieldValue | Get the value by the field name | (name: [NamePath](#NamePath)) => any | |
| getFieldsValue | Get values by a set of field names. Return according to the corresponding structure | (nameList?: [NamePath](#NamePath)[], filterFunc?: (meta: { touched: boolean, validating: boolean }) => boolean) => any | |
| getFieldError | Get the error messages by the field name | (name: [NamePath](#NamePath)) => string[] | |
| getFieldsError | Get the error messages by the fields name. Return as an array | (nameList?: [NamePath](#NamePath)[]) => FieldError[] | |
| isFieldTouched | Check if a field has been operated | (name: [NamePath](#NamePath)) => boolean | |
| isFieldsTouched | Check if fields have been operated. Check if all fields is touched when `allTouched` is `true` | (nameList?: [NamePath](#NamePath)[], allTouched?: boolean) => boolean | |
| isFieldValidating | Check fields if is in validating | (name: [NamePath](#NamePath)) => boolean | |
| transform | Transform value to the rule before validation | (value) => any |
| type | Normally `string` \|`number` \|`boolean` \|`url` \| `email`. More type to ref [here](https://github.com/yiminghe/async-validator#type) | string |
It may be caused by your `validator` if it has some errors that prevents `callback` to be called. You can use `async` instead or use `try...catch` to catch the error:
Before Modal open, children elements do not exist in the view. You can set `forceRender` on Modal to pre-render its children. Click [here](https://codesandbox.io/s/antd-reproduction-template-ibu5c) to view an example.
Components inside Form.Item with name property will turn into controlled mode, that makes `defaultValue` does not work anymore. Please try `initialValues` of Form to set default value.
