chore(core): fix withBemMod typings error

Author: fiberthrone

packages/core/core.ts

@@ -64,30 +64,6 @@ export function withBemMod<T, U extends IClassNameProps = {}>(
   let entityClassName: string
   let modNames: string[]
 
-  // These typings should work properly for class components as well as for forwardRef chains
-  // See: https://github.com/DefinitelyTyped/DefinitelyTyped/issues/35834#issuecomment-497605842
-  interface IWithBemMod {
-    <K extends IClassNameProps, Q extends React.ComponentClass<T & K>>(
-      WrappedComponent: Q,
-    ): React.ForwardRefExoticComponent<
-      React.ComponentPropsWithoutRef<Q> & { ref?: React.Ref<InstanceType<Q>> }
-    >
-
-    <K extends IClassNameProps>(
-      WrappedComponent: React.ForwardRefExoticComponent<T & K & { ref?: React.Ref<any> }>,
-    ): React.ForwardRefExoticComponent<T & K & { ref?: React.Ref<any> }>
-
-    <K extends IClassNameProps>(
-      Component: React.FunctionComponent<T & K>,
-    ): React.ForwardRefExoticComponent<T & K>
-
-    __isSimple: boolean
-    __blockName?: string
-    __mod?: string
-    __value?: string | number | boolean
-    __passToProps?: boolean
-  }
-
   function WithBemMod<K extends IClassNameProps = {}>(WrappedComponent: ComponentType<T & K>) {
     // Use cache to prevent create new component when props are changed.
     let ModifiedComponent: ComponentType<any>
@@ -154,7 +130,29 @@ export function withBemMod<T, U extends IClassNameProps = {}>(
     return BemMod
   }
 
-  const withMod = WithBemMod as IWithBemMod
+  // These typings should work properly for class components as well as for forwardRef chains
+  // See: https://github.com/DefinitelyTyped/DefinitelyTyped/issues/35834#issuecomment-497605842
+  const withMod = WithBemMod as {
+    <K extends IClassNameProps, Q extends React.ComponentClass<T & K>>(
+      WrappedComponent: Q,
+    ): React.ForwardRefExoticComponent<
+      React.ComponentPropsWithoutRef<Q> & { ref?: React.Ref<InstanceType<Q>> }
+    >
+
+    <K extends IClassNameProps>(
+      WrappedComponent: React.ForwardRefExoticComponent<T & K & { ref?: React.Ref<any> }>,
+    ): React.ForwardRefExoticComponent<T & K & { ref?: React.Ref<any> }>
+
+    <K extends IClassNameProps>(
+      Component: React.FunctionComponent<T & K>,
+    ): React.ForwardRefExoticComponent<T & K>
+
+    __isSimple: boolean
+    __blockName?: string
+    __mod?: string
+    __value?: string | number | boolean
+    __passToProps?: boolean
+  }
 
   const { __passToProps = true, __simple = false } = (enhance as withBemModOptions) || {}