feat: add formItemInstance type

Author: tangjinzhou

components/components.ts

@@ -74,7 +74,7 @@ export { default as Drawer } from './drawer';
 export type { EmptyProps } from './empty';
 export { default as Empty } from './empty';
 
-export type { FormProps, FormItemProps, FormInstance } from './form';
+export type { FormProps, FormItemProps, FormInstance, FormItemInstance } from './form';
 export { default as Form, FormItem, FormItemRest } from './form';
 
 export { default as Grid } from './grid';

components/form/FormItem.tsx

@@ -1,4 +1,4 @@
-import type { PropType, ExtractPropTypes, ComputedRef, Ref } from 'vue';
+import type { PropType, ExtractPropTypes, ComputedRef, Ref, ComponentPublicInstance } from 'vue';
 import {
   watch,
   defineComponent,
@@ -99,6 +99,15 @@ export const formItemProps = {
 
 export type FormItemProps = Partial<ExtractPropTypes<typeof formItemProps>>;
 
+export type FormItemExpose = {
+  onFieldBlur: () => void;
+  onFieldChange: () => void;
+  clearValidate: () => void;
+  resetField: () => void;
+};
+
+export type FormItemInstance = ComponentPublicInstance<FormItemProps, FormItemExpose>;
+
 let indexGuid = 0;
 
 // default form item id prefix.

components/form/index.tsx

@@ -6,7 +6,7 @@ import FormItemRest, { useInjectFormItemContext } from './FormItemContext';
 export type { Rule, RuleObject } from './interface';
 
 export type { FormProps, FormInstance } from './Form';
-export type { FormItemProps } from './FormItem';
+export type { FormItemProps, FormItemInstance } from './FormItem';
 
 Form.useInjectFormItemContext = useInjectFormItemContext;
 Form.ItemRest = FormItemRest;