ant-design/components/form/index.zh-CN.md
陈帅 523b74e3b6
merge master into Feature (#25262)
* feat: add successColor for Progress (#24655)

* feat: add successColor for Progress

* feat: update

* fix: update test

* remove snap

* feat: add test case

* refactor success

* feat: adjust styyle

* feat: add DevWarning

* feat: Support rowSelection.dirty (#24718)

* feat: Support rowSelection.dirty

* rename to reserveKeys

* preserveKeys will keep record also

* to preserveSelectedRowKeys

* feat: add ghost prop for collapse (#24734)

* feat: add ghost prop for collapse

* doc: version of collapse's ghost prop

* refactor: make ghost collapse's less code to a nested style

* chore: remove redundant codes in ghost collapse's less & doc

* doc: add a background wrapper for ghost collapse demo

* doc: dark-theme wrapper bg-color for ghost collapse demo

* test: update snapshot of ghost collapse

* doc: use softer bg-color on ghost collapse demo

* doc: remove disabled panel in ghost collapse demo

* feat: form instance support getFieldInstance (#24711)

* support getFieldInstance

* update doc

* fix lint

* move func

* move into hooks

* update ref logic

* fix lint

* rm only

* fix docs

* feat: dropdown support arrow (#23869)

* feat: dropdown support arrow prop

close #22758

* test: update snapshot

* fix: fix dropdown cls names

* test: update snapshot

* test: update snapshot

* doc: update demo

* test: update demo snapshot

* demo

* fix: snapshot

* chore: change the style of ghost collapse & demo modified (#24762)

* refactor: reduce content padding in ghost collapse

* doc: remove the wrapper outside ghost collapse

Designer want the demo differs from other demos

* refactor: remove redundant .less code in collapse

* feat: cascader dropdown-render prop (#24812)

* feat: cascader dropdown-render prop

* fix: update Cascader dropdownRender type annotation

* fix: set rc-cascader semver from ^ to ~

* docs: fix coding style in cascader/custom-dropdown

* feat: 🆕 support Drawer closeIcon (#24842)

* feat: 🆕 support Drawer closeIcon

close #19283
close #19153

* add test case

* update docs

* feat: 🆕 Cascader expandIcon (#24865)

* feat: cascader expandIcon

* fix: snap

* refactor: reduce CSS size (#24846)

* refactor: reduce button css size

* refactor: remove redundant button .less code

* feat: add Table onChange an action param (#24697)

* Working on tests

* created TableAction type

* changed TableActions to tuple

* removed chinese documentation line

* refactor TableActions

* fix documentation

* Moved action into extra param

* minor doc change

* feat: add closeIcon customize tag close (#24885)

* feat: add closeIcon customize tag close

* docs fix

* update snap

* fix: css name

* update snapshot

* snapshot

* feat: add radio `optionType` api to set radio option type (#24809)

* feat: radio component

* docs: update md

* fix: snap

* test components

* fix: use optionType

* fix name

* add warning

* fix

* feat: expand rate character (#24903)

* feat: expand rate character

* fix: demo

* fix: snap

* Update components/rate/index.zh-CN.md

Co-authored-by: 偏右 <afc163@gmail.com>

* fix

Co-authored-by: 偏右 <afc163@gmail.com>

* Refactor demo code box actions (#24887)

* refactor: refine the styling of actions part of demo code-box

* fix: lint style

* refactor: move Result children to end (#24945)

* feat: remove content max-width on dot-step (#24907)

* feat: add Skeleton-Image (#24805)

* feat: add Skeleton-Image

* feat: add docs

* fix: adjust skeleton

* feat: adjust Image Component

* feat: rebase

* feat: adjust style

* fix: lint

* feat: remove size

* feat: delete md

* feat: fix style

*  feat: Mentions support autoSize (#24961)

close #17746

* chore: replace textarea with rc-textarea (#24966)

* feat: update pagination@2.3.0 support onChange called when pageSize change (#24964)

* feat: update pagination@2.5.0 and add test case to relative component

* fix: lint

* delete

* feat: add test case for pagination

* adjust test case

* feat: Implement centered prop in Tabs (#24958)

* Implement centered in Tabs along with its tests and docs

* Fix build error

* Add Chinese translations and remove test case

Co-authored-by: Ashkan Pourghasem <ashkan.pourghasem@gmail.com>

* feat: Add modal style parameter (#24773)

* add some paramters in default.less

* Update components/style/themes/default.less

Co-authored-by: Amumu <yoyo837@hotmail.com>

* change parameter in compact.less

Co-authored-by: Crystal Gao <jinggao@ebay.com>
Co-authored-by: Amumu <yoyo837@hotmail.com>

* feat: export Tabs addIcon (#25006)

* feat: export Tabs addIcon

* update snapshot

* feat: showNow on timepicker and datetimepicker (#25032)

* feat: update rc-picker@1.7.1 and fix icons of month and quarter picker in DatePicker Component (#25035)

* feat: update rc-picker@1.7.1

* delete

* add

* feat: expand rate support props (#24993)

* docs: 📝 Add Form.Item hidden in doc (#25108)

close #25101

* fix: ⌨️ Improve Pagination accessibility issue (#25119)

* ⌨️ Improve Pagination a11y by fixing a W3C error

https://github.com/react-component/pagination/issues/280

* update snapshot

* 🆙 rc-pagination to 2.4.1

* feat: support triggerSubMenuAction for <Menu /> (#25127)

* feat(menu): add triggerSubMenuAction for Menu

* feat(menu): test cases

* chore: Adjust picker logic (#25135)

* chore: update rc-picker 1.10.0 (#25174)

* feat: table row check strictly (#24931)

* feat: add checkStrictly on Table.rowSelection

* fix: LGTM warnings

* test: table rowSelection.checkStrictly

* test: add cov [wip]

* refactor: tree.rowSelection.checkStrictly [wip]

* test: table.rowSelection.checkStrictly basic case

* feat: support rowKey on checkStrictly table

* feat: Table checkStrictly support getCheckboxProps

* docs: Table checkStrictly

* chore: typo

* chore: remove useless comment

* chore: update snapshot

* chore: update snapshot

* fix: fire selectAll on selection dropdown menu & changeRows incorrect in selectAll callback

* docs: typo

* chore

* chore

* fix: expand buttons of leaf rows in tree data are not hidden

* feat: Table warning about rowKey index parameter

* perf: only generate keyEntities when not checkStrictly

* refactor: remove useless parseCheckedKeys

* refactor: get derived selected & half selected keys from selectedRowKeys

* chore: remove env condition stmt

* chore: revert index usage & code formatting

* chore: rerun ci

* docs: table tree-data checkstrictly

* test: update snapshots

* refactor: use useMergedState hook

* chore: rerun ci

* chore: rerun ci 2

* chore: revert selection select all behavior

* refactor: refactor code based on feature

* chore: revert table code format

* chore: revert table code format

* fix: useMemo deps

* fix: useMemo deps

* fix: useMemo deps

* feat: support preserve (#25186)

* docs: add responsibly order for Col (#25139)

* feat: add type

* feat: add responsibly order cols

* feat: add docs

* feat: add test case

* fix test

Co-authored-by: 二货机器人 <smith3816@gmail.com>
Co-authored-by: 偏右 <afc163@gmail.com>
Co-authored-by: zoomdong <1344492820@qq.com>
Co-authored-by: 07akioni <07akioni2@gmail.com>
Co-authored-by: wendellhu <wendellhu95@gmail.com>
Co-authored-by: xrkffgg <xrkffgg@gmail.com>
Co-authored-by: Neto Braghetto <netow93@gmail.com>
Co-authored-by: Kermit Xuan <kermitlx@outlook.com>
Co-authored-by: Ashkan Pourghasem <64011067+ashkan-pm@users.noreply.github.com>
Co-authored-by: Ashkan Pourghasem <ashkan.pourghasem@gmail.com>
Co-authored-by: hicrystal <295247343@qq.com>
Co-authored-by: Crystal Gao <jinggao@ebay.com>
Co-authored-by: Amumu <yoyo837@hotmail.com>
Co-authored-by: Li Ming <armyiljfe@gmail.com>
2020-06-28 22:41:59 +08:00

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---
category: Components
subtitle: 表单
type: 数据录入
cols: 1
title: Form
cover: https://gw.alipayobjects.com/zos/alicdn/ORmcdeaoO/Form.svg
---
高性能表单控件,自带数据域管理。包含数据录入、校验以及对应样式。
## 何时使用
- 用于创建一个实体或收集信息。
- 需要对输入的数据类型进行校验时。
## API
### Form
| 参数 | 说明 | 类型 | 默认值 | 版本 |
| --- | --- | --- | --- | --- |
| component | 设置 Form 渲染元素,为 `false` 则不创建 DOM 节点 | ComponentType \| false | form | |
| colon | 配置 Form.Item 的 `colon` 的默认值。表示是否显示 label 后面的冒号 (只有在属性 layout 为 horizontal 时有效) | boolean | true | |
| fields | 通过状态管理(如 redux控制表单字段如非强需求不推荐使用。查看[示例](#components-form-demo-global-state) | [FieldData](#FieldData)\[] | - | |
| form | 经 `Form.useForm()` 创建的 form 控制实例,不提供时会自动创建 | [FormInstance](#FormInstance) | - | |
| hideRequiredMark | 隐藏所有表单项的必选标记 | boolean | false | |
| initialValues | 表单默认值,只有初始化以及重置时生效 | object | - | |
| labelAlign | label 标签的文本对齐方式 | `left` \| `right` | `right` | |
| labelCol | label 标签布局,同 `<Col>` 组件,设置 `span` `offset` 值,如 `{span: 3, offset: 12}``sm: {span: 3, offset: 12}` | [object](/components/grid/#Col) | - | |
| layout | 表单布局 | `horizontal` \| `vertical` \| `inline` | `horizontal` | |
| name | 表单名称,会作为表单字段 `id` 前缀使用 | string | - | |
| preserve | 当字段被删除时保留字段值 | boolean | true | 4.4.0 |
| scrollToFirstError | 提交失败自动滚动到第一个错误字段 | boolean | false | |
| size | 设置字段组件的尺寸(仅限 antd 组件) | `small` \| `middle` \| `large` | - | |
| validateMessages | 验证提示模板,说明[见下](#validateMessages) | [ValidateMessages](https://github.com/react-component/field-form/blob/master/src/utils/messages.ts) | - | |
| validateTrigger | 统一设置字段校验规则 | string \| string[] | `onChange` | 4.3.0 |
| wrapperCol | 需要为输入控件设置布局样式时,使用该属性,用法同 labelCol | [object](/components/grid/#Col) | - | |
| onFinish | 提交表单且数据验证成功后回调事件 | Function(values) | - | |
| onFinishFailed | 提交表单且数据验证失败后回调事件 | Function({ values, errorFields, outOfDate }) | - | |
| onFieldsChange | 字段更新时触发回调事件 | Function(changedFields, allFields) | - | |
| onValuesChange | 字段值更新时触发回调事件 | Function(changedValues, allValues) | - | |
### validateMessages
Form 为验证提供了[默认的错误提示信息](https://github.com/react-component/field-form/blob/master/src/utils/messages.ts),你可以通过配置 `validateMessages` 属性,修改对应的提示模板。一种常见的使用方式,是配置国际化提示信息:
```jsx
const validateMessages = {
required: "'${name}' 是必选字段",
// ...
};
<Form validateMessages={validateMessages} />;
```
此外,[ConfigProvider](/components/config-provider/) 也提供了全局化配置方案,允许统一配置错误提示模板:
```jsx
const validateMessages = {
required: "'${name}' 是必选字段",
// ...
};
<ConfigProvider form={{ validateMessages }}>
<Form />
</ConfigProvider>;
```
## Form.Item
表单字段组件,用于数据双向绑定、校验、布局等。
| 参数 | 说明 | 类型 | 默认值 | 版本 |
| --- | --- | --- | --- | --- |
| colon | 配合 `label` 属性使用,表示是否显示 `label` 后面的冒号 | boolean | true | |
| dependencies | 设置依赖字段,说明[见下](#dependencies) | [NamePath](#NamePath)[] | - | |
| extra | 额外的提示信息,和 `help` 类似,当需要错误信息和提示文案同时出现时,可以使用这个。 | string\|ReactNode | - | |
| getValueFromEvent | 设置如何将 event 的值转换成字段值 | (..args: any[]) => any | - | |
| getValueProps | 为子元素添加额外的属性 | (value: any) => any | - | 4.2.0 |
| hasFeedback | 配合 `validateStatus` 属性使用,展示校验状态图标,建议只配合 Input 组件使用 | boolean | false | |
| help | 提示信息,如不设置,则会根据校验规则自动生成 | string\|ReactNode | - | |
| htmlFor | 设置子元素 label `htmlFor` 属性 | string | - | |
| initialValue | 设置子元素默认值,如果与 Form 的 `initialValues` 冲突则以 Form 为准 | string | - | 4.2.0 |
| noStyle | 为 `true` 时不带样式,作为纯字段控件使用 | boolean | false | |
| label | `label` 标签的文本 | string\|ReactNode | - | |
| labelAlign | 标签文本对齐方式 | `left` \| `right` | `right` | |
| labelCol | `label` 标签布局,同 `<Col>` 组件,设置 `span` `offset` 值,如 `{span: 3, offset: 12}``sm: {span: 3, offset: 12}`。你可以通过 Form 的 `labelCol` 进行统一设置。当和 Form 同时设置时,以 Item 为准 | [object](/components/grid/#Col) | - | |
| name | 字段名,支持数组 | [NamePath](#NamePath) | - | |
| preserve | 当字段被删除时保留字段值 | boolean | true | 4.4.0 |
| normalize | 组件获取值后进行转换,再放入 Form 中 | (value, prevValue, prevValues) => any | - | |
| required | 必填样式设置。如不设置,则会根据校验规则自动生成 | boolean | false | |
| rules | 校验规则,设置字段的校验逻辑。点击[此处](#components-form-demo-basic)查看示例 | [Rule](#Rule)[] | - | |
| shouldUpdate | 自定义字段更新逻辑,说明[见下](#shouldUpdate) | boolean \| (prevValue, curValue) => boolean | false | |
| trigger | 设置收集字段值变更的时机 | string | `onChange` | |
| validateFirst | 当某一规则校验不通过时,是否停止剩下的规则的校验 | boolean | false | |
| validateStatus | 校验状态,如不设置,则会根据校验规则自动生成,可选:'success' 'warning' 'error' 'validating' | string | - | |
| validateTrigger | 设置字段校验的时机 | string \| string[] | `onChange` | |
| valuePropName | 子节点的值的属性,如 Switch 的是 'checked'。该属性为 `getValueProps` 的封装,自定义 `getValueProps` 后会失效 | string | `value` | |
| wrapperCol | 需要为输入控件设置布局样式时,使用该属性,用法同 `labelCol`。你可以通过 Form 的 `wrapperCol` 进行统一设置。当和 Form 同时设置时,以 Item 为准。 | [object](/components/grid/#Col) | - | |
| hidden | 是否隐藏字段(依然会收集和校验字段) | boolean | false | |
被设置了 `name` 属性的 `Form.Item` 包装的控件,表单控件会自动添加 `value`(或 `valuePropName` 指定的其他属性) `onChange`(或 `trigger` 指定的其他属性),数据同步将被 Form 接管,这会导致以下结果:
1. 你**不再需要也不应该**用 `onChange` 来做数据收集同步(你可以使用 Form 的 `onValuesChange`),但还是可以继续监听 `onChange` 事件。
2. 你不能用控件的 `value``defaultValue` 等属性来设置表单域的值,默认值可以用 Form 里的 `initialValues` 来设置。注意 `initialValues` 不能被 `setState` 动态更新,你需要用 `setFieldsValue` 来更新。
3. 你不应该用 `setState`,可以使用 `form.setFieldsValue` 来动态改变表单值。
### dependencies
当字段间存在依赖关系时使用。如果一个字段设置了 `dependencies` 属性。那么它所依赖的字段更新时,该字段将自动触发更新与校验。一种常见的场景,就是注册用户表单的“密码”与“确认密码”字段。“确认密码”校验依赖于“密码”字段,设置 `dependencies` 后,“密码”字段更新会重新触发“校验密码”的校验逻辑。你可以参考[具体例子](#components-form-demo-register)。
### shouldUpdate
Form 通过增量更新方式,只更新被修改的字段相关组件以达到性能优化目的。大部分场景下,你只需要编写代码或者与 [`dependencies`](#dependencies) 属性配合校验即可。而在某些特定场景,例如修改某个字段值后出现新的字段选项、或者纯粹希望表单任意变化都对某一个区域进行渲染。你可以通过 `shouldUpdate` 修改 Form.Item 的更新逻辑。
`shouldUpdate``true`Form 的任意变化都会使该 Form.Item 重新渲染。这对于自定义渲染一些区域十分有帮助:
```jsx
<Form.Item shouldUpdate>
{() => {
return <pre>{JSON.stringify(form.getFieldsValue(), null, 2)}</pre>;
}}
</Form.Item>
```
你可以参考[示例](#components-form-demo-horizontal-login)查看具体使用场景。
`shouldUpdate` 为方法时,表单的每次数值更新都会调用该方法,提供原先的值与当前的值以供你比较是否需要更新。这对于是否根据值来渲染额外字段十分有帮助:
```jsx
<Form.Item shouldUpdate={(prevValues, curValues) => prevValues.additional !== curValues.additional}>
{() => {
return (
<Form.Item name="other">
<Input />
</Form.Item>
);
}}
</Form.Item>
```
你可以参考[示例](#components-form-demo-control-hooks)查看具体使用场景。
## Form.List
为字段提供数组化管理。
| 参数 | 说明 | 类型 | 默认值 |
| --- | --- | --- | --- |
| name | 字段名,支持数组 | [NamePath](#NamePath) | - |
| children | 渲染函数 | (fields: Field[], operation: { add, remove, move }) => React.ReactNode | - |
```tsx
<Form.List>
{fields => (
<div>
{fields.map(field => (
<Form.Item {...field}>
<Input />
</Form.Item>
))}
</div>
)}
</Form.List>
```
## Form.Provider
提供表单间联动功能,其下设置 `name` 的 Form 更新时,会自动触发对应事件。查看[示例](#components-form-demo-form-context)。
| 参数 | 说明 | 类型 | 默认值 |
| --- | --- | --- | --- |
| onFormChange | 子表单字段更新时触发 | Function(formName: string, info: { changedFields, forms }) | - |
| onFormFinish | 子表单提交时触发 | Function(formName: string, info: { values, forms }) | - |
```jsx
<Form.Provider
onFormFinish={name => {
if (name === 'form1') {
// Do something...
}
}}
>
<Form name="form1">...</Form>
<Form name="form2">...</Form>
</Form.Provider>
```
### FormInstance
| 名称 | 说明 | 类型 | 版本 |
| --- | --- | --- | --- |
| getFieldInstance | 获取对应字段示例 | (name: [NamePath](#NamePath)) => any | 4.4.0 |
| getFieldValue | 获取对应字段名的值 | (name: [NamePath](#NamePath)) => any | |
| getFieldsValue | 获取一组字段名对应的值,会按照对应结构返回 | (nameList?: [NamePath](#NamePath)[], filterFunc?: (meta: { touched: boolean, validating: boolean }) => boolean) => any | |
| getFieldError | 获取对应字段名的错误信息 | (name: [NamePath](#NamePath)) => string[] | |
| getFieldsError | 获取一组字段名对应的错误信息,返回为数组形式 | (nameList?: [NamePath](#NamePath)[]) => FieldError[] | |
| isFieldTouched | 检查对应字段是否被用户操作过 | (name: [NamePath](#NamePath)) => boolean | |
| isFieldsTouched | 检查一组字段是否被用户操作过,`allTouched` 为 `true` 时检查是否所有字段都被操作过 | (nameList?: [NamePath](#NamePath)[], allTouched?: boolean) => boolean | |
| isFieldValidating | 检查一组字段是否正在校验 | (name: [NamePath](#NamePath)) => boolean | |
| resetFields | 重置一组字段到 `initialValues` | (fields?: [NamePath](#NamePath)[]) => void | |
| scrollToField | 滚动到对应字段位置 | (name: [NamePath](#NamePath), options: [[ScrollOptions](https://github.com/stipsan/scroll-into-view-if-needed/tree/ece40bd9143f48caf4b99503425ecb16b0ad8249#options)]) => void | |
| setFields | 设置一组字段状态 | (fields: [FieldData](#FieldData)[]) => void | |
| setFieldsValue | 设置表单的值 | (values) => void | |
| submit | 提交表单,与点击 `submit` 按钮效果相同 | () => void | |
| validateFields | 触发表单验证 | (nameList?: [NamePath](#NamePath)[]) => Promise | |
#### validateFields 返回示例
```jsx
validateFields()
.then(values => {
/*
values:
{
username: 'username',
password: 'password',
}
*/
})
.catch(errorInfo => {
/*
errorInfo:
{
values: {
username: 'username',
password: 'password',
},
errorFields: [
{ password: ['username'], errors: ['Please input your Password!'] },
],
outOfDate: false,
}
*/
});
```
### Interface
#### NamePath
`string | number | (string | number)[]`
#### FieldData
| 名称 | 说明 | 类型 |
| ---------- | ---------------- | ----------------------- |
| touched | 是否被用户操作过 | boolean |
| validating | 是否正在校验 | boolean |
| errors | 错误信息 | string[] |
| name | 字段名称 | [NamePath](#NamePath)[] |
| value | 字段对应值 | any |
#### Rule
Rule 支持接收 object 进行配置,也支持 function 来动态获取 form 的数据:
```tsx
type Rule = RuleConfig | ((form: FormInstance) => RuleConfig);
```
| 名称 | 说明 | 类型 |
| --- | --- | --- |
| enum | 是否匹配枚举中的值 | any[] |
| len | string 类型时为字符串长度number 类型时为确定数字; array 类型时为数组长度 | number |
| max | 必须设置 `type`string 类型为字符串最大长度number 类型时为最大值array 类型时为数组最大长度 | number |
| message | 错误信息,不设置时会通过[模板](#validateMessages)自动生成 | string |
| min | 必须设置 `type`string 类型为字符串最小长度number 类型时为最小值array 类型时为数组最小长度 | number |
| pattern | 正则表达式匹配 | RegExp |
| required | 是否为必选字段 | boolean |
| transform | 将字段值转换成目标值后进行校验 | (value) => any |
| type | 类型,常见有 `string` \|`number` \|`boolean` \|`url` \| `email`。更多请参考[此处](https://github.com/yiminghe/async-validator#type) | string |
| validator | 自定义校验,接收 Promise 作为返回值。[示例](#components-form-demo-register)参考 | ([rule](#Rule), value) => Promise |
| whitespace | 如果字段仅包含空格则校验不通过 | boolean |
| validateTrigger | 设置触发验证时机,必须是 Form.Item 的 `validateTrigger` 的子集 | string \| string[] |
## 从 v3 升级到 v4
如果你是 antd v3 的用户,你可以参考[迁移示例](/components/form/v3)。
<style>
.code-box-demo .ant-form:not(.ant-form-inline):not(.ant-form-vertical) {
max-width: 600px;
}
.markdown.api-container table td:nth-of-type(4) {
white-space: nowrap;
word-wrap: break-word;
}
</style>
## FAQ
### 自定义 validator 没有效果
这是由于你的 `validator` 有错误导致 `callback` 没有执行到。你可以选择通过 `async` 返回一个 promise 或者使用 `try...catch` 进行错误捕获:
```jsx
validator: async (rule, value) => {
throw new Error('Something wrong!');
}
// or
validator(rule, value, callback) => {
try {
throw new Error('Something wrong!');
} catch (err) {
callback(err);
}
}
```
### 为何在 Modal 中调用 form 控制台会报错?
> Warning: Instance created by `useForm` is not connect to any Form element. Forget to pass `form` prop?
这是因为你在调用 form 方法时Modal 还未初始化导致 form 没有关联任何 Form 组件。你可以通过给 Modal 设置 `forceRender` 将其预渲染。示例点击[此处](https://codesandbox.io/s/antd-reproduction-template-ibu5c)。
### 为什么 Form.Item 下的子组件 `defaultValue` 不生效?
当你为 Form.Item 设置 `name` 属性后,子组件会转为受控模式。因而 `defaultValue` 不会生效。你需要在 Form 上通过 `initialValues` 设置默认值。
### 为什么 `resetFields` 会重新 mount 组件?
`resetFields` 会重置整个 Field因而其子组件也会重新 mount 从而消除自定义组件可能存在的副作用(例如异步数据、状态等等)。
### Form 的 initialValues 与 Item 的 initialValue 区别?
在大部分场景下,我们总是推荐优先使用 Form 的 `initialValues`。只有存在动态字段时你才应该使用 Item 的 `initialValue`。默认值遵循以下规则:
1. Form 的 `initialValues` 拥有最高优先级
2. Field 的 `initialValue` 次之 \*. 多个同 `name` Item 都设置 `initialValue` 时,则 Item 的 `initialValue` 不生效
### 为什么字段设置 `rules` 后更改值 `onFieldsChange` 会触发三次?
字段除了本身的值变化外,校验也是其状态之一。因而在触发字段变化会经历以下几个阶段:
1. Trigger value change
2. Rule validating
3. Rule validated
在触发过程中,调用 `isFieldValidating` 会经历 `false` > `true` > `false` 的变化过程。
<style>
.site-form-item-icon {
color: rgba(0, 0, 0, 0.25);
}
[data-theme="dark"] .site-form-item-icon {
color: rgba(255,255,255,.3);
}
</style>