feat(form): usewatch

package.json

@@ -105,7 +105,8 @@
     "classnames": "^2.5.1",
     "lodash.isequal": "^4.5.0",
     "lodash.kebabcase": "^4.1.1",
-    "react-transition-group": "^4.4.5"
+    "react-transition-group": "^4.4.5",
+    "rc-util": "^5.32.2"
   },
   "devDependencies": {
     "@babel/core": "^7.23.9",

src/packages/form/demo.taro.tsx

@@ -9,6 +9,7 @@ import Demo4 from './demos/taro/demo4'
 import Demo5 from './demos/taro/demo5'
 import Demo6 from './demos/taro/demo6'
 import Demo7 from './demos/taro/demo7'
+import Demo8 from './demos/taro/demo8'
 
 const FormDemo = () => {
   const [translated] = useTranslate({
@@ -19,6 +20,7 @@ const FormDemo = () => {
       relatedDisplay: '关联展示',
       title4: 'Form.useForm 对表单数据域进行交互。',
       title5: '表单类型',
+      title6: 'Form.useWatch 对表单数据监听',
       validateTrigger: '校验触发时机',
     },
     'en-US': {
@@ -28,6 +30,7 @@ const FormDemo = () => {
       relatedDisplay: 'Related Display',
       title4: 'Interact with form data fields via Form.useForm',
       title5: 'Form Type',
+      title6: 'Watch field data change with Form.useWatch',
       validateTrigger: 'Validate Trigger',
     },
   })
@@ -50,6 +53,8 @@ const FormDemo = () => {
         <Demo6 />
         <h2>{translated.title5}</h2>
         <Demo7 />
+        <h2>{translated.title6}</h2>
+        <Demo8 />
       </div>
     </>
   )

src/packages/form/demo.tsx

@@ -7,6 +7,7 @@ import Demo4 from './demos/h5/demo4'
 import Demo5 from './demos/h5/demo5'
 import Demo6 from './demos/h5/demo6'
 import Demo7 from './demos/h5/demo7'
+import Demo8 from './demos/h5/demo8'
 
 const FormDemo = () => {
   const [translated] = useTranslate({
@@ -17,6 +18,7 @@ const FormDemo = () => {
       relatedDisplay: '关联展示',
       title4: 'Form.useForm 对表单数据域进行交互。',
       title5: '表单类型',
+      title6: 'Form.useWatch 对表单数据监听',
       validateTrigger: '校验触发时机',
     },
     'en-US': {
@@ -26,6 +28,7 @@ const FormDemo = () => {
       relatedDisplay: 'Related Display',
       title4: 'Interact with form data fields via Form.useForm',
       title5: 'Form Type',
+      title6: 'Watch field data change with Form.useWatch',
       validateTrigger: 'Validate Trigger',
     },
   })
@@ -47,6 +50,8 @@ const FormDemo = () => {
         <Demo6 />
         <h2>{translated.title5}</h2>
         <Demo7 />
+        <h2>{translated.title6}</h2>
+        <Demo8 />
       </div>
     </>
   )

src/packages/form/demos/h5/demo8.tsx

@@ -0,0 +1,100 @@
+import React from 'react'
+import { Cell, Form, Input, Picker, Radio, Toast } from '@nutui/nutui-react'
+import { ArrowRight } from '@nutui/icons-react'
+
+const Demo8 = () => {
+  const pickerOptions = [
+    { value: 4, text: 'BeiJing' },
+    { value: 1, text: 'NanJing' },
+    { value: 2, text: 'WuXi' },
+    { value: 8, text: 'DaQing' },
+    { value: 9, text: 'SuiHua' },
+    { value: 10, text: 'WeiFang' },
+    { value: 12, text: 'ShiJiaZhuang' },
+  ]
+  const submitFailed = (error: any) => {
+    Toast.show({ content: JSON.stringify(error), icon: 'fail' })
+  }
+
+  const submitSucceed = (values: any) => {
+    Toast.show({ content: JSON.stringify(values), icon: 'success' })
+  }
+
+  const [form] = Form.useForm()
+  const usernameWatch = Form.useWatch('username', form)
+
+  const noteWatch = Form.useWatch((values) => {
+    return values.picker
+  }, form)
+
+  const genderWatch = Form.useWatch((values) => {
+    return values.gender
+  }, form)
+
+  return (
+    <>
+      <Form
+        form={form}
+        onFinish={(values) => submitSucceed(values)}
+        onFinishFailed={(values, errors) => submitFailed(errors)}
+      >
+        <Form.Item
+          label="字段A"
+          name="username"
+          initialValue="默认值"
+          rules={[{ required: true, message: '请输入字段A' }]}
+        >
+          <Input placeholder="请输入字段A" type="text" />
+        </Form.Item>
+        <Form.Item
+          label="Picker"
+          name="picker"
+          trigger="onConfirm"
+          getValueFromEvent={(...args) => args[1]}
+          onClick={(event, ref: any) => {
+            ref.open()
+          }}
+        >
+          <Picker options={[pickerOptions]}>
+            {(value: any) => {
+              return (
+                <Cell
+                  style={{
+                    padding: 0,
+                    '--nutui-cell-divider-border-bottom': '0',
+                  }}
+                  className="nutui-cell--clickable"
+                  title={
+                    value.length
+                      ? pickerOptions.filter((po) => po.value === value[0])[0]
+                          ?.text
+                      : 'Please select'
+                  }
+                  extra={<ArrowRight />}
+                  align="center"
+                />
+              )
+            }}
+          </Picker>
+        </Form.Item>
+        <Form.Item label="字段B" name="gender">
+          <Radio.Group>
+            <Radio value="male">male</Radio>
+            <Radio value="female">female</Radio>
+          </Radio.Group>
+        </Form.Item>
+      </Form>
+      <Cell>
+        <div>字段A：{usernameWatch}</div>
+      </Cell>
+      <Cell>
+        <div>Picker：{noteWatch}</div>
+      </Cell>
+      <Cell>
+        <div>字段B：{genderWatch}</div>
+      </Cell>
+    </>
+  )
+}
+
+export default Demo8

src/packages/form/demos/taro/demo8.tsx

@@ -0,0 +1,101 @@
+import React from 'react'
+import Taro from '@tarojs/taro'
+import { Cell, Form, Input, Picker, Radio } from '@nutui/nutui-react-taro'
+import { ArrowRight } from '@nutui/icons-react-taro'
+
+const Demo8 = () => {
+  const pickerOptions = [
+    { value: 4, text: 'BeiJing' },
+    { value: 1, text: 'NanJing' },
+    { value: 2, text: 'WuXi' },
+    { value: 8, text: 'DaQing' },
+    { value: 9, text: 'SuiHua' },
+    { value: 10, text: 'WeiFang' },
+    { value: 12, text: 'ShiJiaZhuang' },
+  ]
+  const submitFailed = (error: any) => {
+    Taro.showToast({ title: JSON.stringify(error), icon: 'error' })
+  }
+
+  const submitSucceed = (values: any) => {
+    Taro.showToast({ title: JSON.stringify(values), icon: 'success' })
+  }
+
+  const [form] = Form.useForm()
+  const usernameWatch = Form.useWatch('username', form)
+
+  const noteWatch = Form.useWatch((values) => {
+    return values.picker
+  }, form)
+
+  const genderWatch = Form.useWatch((values) => {
+    return values.gender
+  }, form)
+
+  return (
+    <>
+      <Form
+        form={form}
+        onFinish={(values) => submitSucceed(values)}
+        onFinishFailed={(values, errors) => submitFailed(errors)}
+      >
+        <Form.Item
+          label="字段A"
+          name="username"
+          initialValue="默认值"
+          rules={[{ required: true, message: '请输入字段A' }]}
+        >
+          <Input placeholder="请输入字段A" type="text" />
+        </Form.Item>
+        <Form.Item
+          label="Picker"
+          name="picker"
+          trigger="onConfirm"
+          getValueFromEvent={(...args) => args[1]}
+          onClick={(event, ref: any) => {
+            ref.open()
+          }}
+        >
+          <Picker options={[pickerOptions]}>
+            {(value: any) => {
+              return (
+                <Cell
+                  style={{
+                    padding: 0,
+                    '--nutui-cell-divider-border-bottom': '0',
+                  }}
+                  className="nutui-cell--clickable"
+                  title={
+                    value.length
+                      ? pickerOptions.filter((po) => po.value === value[0])[0]
+                          ?.text
+                      : 'Please select'
+                  }
+                  extra={<ArrowRight />}
+                  align="center"
+                />
+              )
+            }}
+          </Picker>
+        </Form.Item>
+        <Form.Item label="字段B" name="gender">
+          <Radio.Group>
+            <Radio value="male">male</Radio>
+            <Radio value="female">female</Radio>
+          </Radio.Group>
+        </Form.Item>
+      </Form>
+      <Cell>
+        <div>字段A：{usernameWatch}</div>
+      </Cell>
+      <Cell>
+        <div>Picker：{noteWatch}</div>
+      </Cell>
+      <Cell>
+        <div>字段B：{genderWatch}</div>
+      </Cell>
+    </>
+  )
+}
+
+export default Demo8

src/packages/form/doc.md

@@ -120,8 +120,6 @@ import { Form } from '@nutui/nutui-react'
 
 ### FormInstance
 
-Form.useForm()创建 Form 实例，用于管理所有数据状态。
-
 | 属性 | 说明 | 类型 |
 | --- | --- | --- |
 | getFieldValue | 获取对应字段名的值 | `(name: NamePath) => any` |
@@ -131,6 +129,12 @@ Form.useForm()创建 Form 实例，用于管理所有数据状态。
 | resetFields | 重置表单提示状态 | `() => void` |
 | submit | 提交表单进行校验的方法 | `Promise` |
 
+### Hook
+
+Form.useForm() 创建 Form 实例，用于管理所有数据状态。
+
+Form.useWatch() 用于直接获取 form 中字段对应的值。
+
 ## 主题定制
 
 ### 样式变量

src/packages/form/index.taro.ts

@@ -3,6 +3,7 @@ import { Form, FormProps } from './form.taro'
 import { FormItem } from '../formitem/formitem.taro'
 import { FormInstance } from './types'
 import { useForm } from '@/packages/form/useform.taro'
+import useWatch from './useWatch.taro'
 
 export type {
   FormItemRuleWithoutValidator,
@@ -17,11 +18,13 @@ type CompoundedComponent = React.ForwardRefExoticComponent<
 > & {
   Item: typeof FormItem
   useForm: typeof useForm
+  useWatch: typeof useWatch
 }
 
 const InnerForm = Form as CompoundedComponent
 
 InnerForm.Item = FormItem
 InnerForm.useForm = useForm
+InnerForm.useWatch = useWatch
 
 export default InnerForm

src/packages/form/index.ts

@@ -3,6 +3,7 @@ import { Form, FormProps } from './form'
 import { FormItem } from '../formitem/formitem'
 import { FormInstance } from './types'
 import { useForm } from '@/packages/form/useform'
+import useWatch from './useWatch'
 
 export type {
   FormItemRuleWithoutValidator,
@@ -17,11 +18,13 @@ type CompoundedComponent = React.ForwardRefExoticComponent<
 > & {
   Item: typeof FormItem
   useForm: typeof useForm
+  useWatch: typeof useWatch
 }
 
 const InnerForm = Form as CompoundedComponent
 
 InnerForm.Item = FormItem
 InnerForm.useForm = useForm
+InnerForm.useWatch = useWatch
 
 export default InnerForm

src/packages/form/types.ts

@@ -8,6 +8,7 @@ export interface FormItemRuleWithoutValidator {
 
 type StoreValue = any
 export type NamePath = string | number
+export type InternalNamePath = (string | number)[]
 
 export interface Callbacks<Values = any> {
   onValuesChange?: (values: Values) => void
@@ -30,6 +31,15 @@ export interface FormInstance<Values = any> {
   validateFields: (nameList?: NamePath[]) => Promise<any[]>
 }
 
+export type InternalFormInstance = FormInstance & { _init: boolean }
+
+export type WatchCallBack = (
+  allValues: Store,
+  namePathList: InternalNamePath[]
+) => void
+export interface WatchOptions<Form extends FormInstance = FormInstance> {
+  form?: Form
+}
 export interface FormFieldEntity {
   onStoreChange: (type?: string) => void
   getNamePath: () => NamePath