fixed Ts inferance

Author: Harry Whorlow

packages/form-core/src/FieldApi.ts

@@ -126,7 +126,7 @@ export type FieldListenerFn<
  */
 export type FieldMetaFn<TFormData, TMetaExtension extends object> = (
   props: Derived<FormState<TFormData>>,
-) => FieldMeta<TMetaExtension>
+) => TMetaExtension
 
 export interface FieldValidators<
   TParentData,
@@ -476,7 +476,8 @@ export class FieldApi<
     TName,
     TFieldValidator,
     TFormValidator,
-    TData
+    TData,
+    TMetaExtension
   > = {} as any
   /**
    * The field state store.
@@ -499,7 +500,8 @@ export class FieldApi<
       TName,
       TFieldValidator,
       TFormValidator,
-      TData
+      TData,
+      TMetaExtension
     >,
   ) {
     this.form = opts.form as never

packages/form-core/tests/FieldApi.spec.ts

@@ -1761,7 +1761,7 @@ describe('field api', () => {
     expect(nameField.getMeta().errors).toEqual(['THERE IS AN ERROR'])
   })
 
-  it('should have user defined meta', () => {
+  it('should have user defined meta and react to value change', () => {
     const form = new FormApi({
       defaultValues: {
         name: 'Stegosaurus',
@@ -1778,14 +1778,9 @@ describe('field api', () => {
     })
 
     nameField.mount()
-
-    // cant infer dinosaur from getMeta()
     expect(nameField.getMeta().dinosaur).toEqual('dino')
 
     nameField.handleChange('Cat')
-
-    expect(nameField.state.value).toEqual('Cat')
-
     expect(nameField.getMeta().dinosaur).toEqual('notDino')
   })
 })