fix: cascader's onChange ts adapts to single and multiple (ant-design…

…#33947)

* fix to: cascader's multiple determines the declaration of onChange

* fix: cascader's onChange ts adapts to single and multiple

* test: fix

components/cascader/__tests__/type.test.tsx

@@ -74,4 +74,18 @@ describe('Cascader.typescript', () => {
     );
     expect(wrapper).toBeTruthy();
   });
+
+  it('single onChange', () => {
+    const wrapper = mount(
+      <Cascader multiple={false} onChange={(values: (string | number)[]) => values} />,
+    );
+    expect(wrapper).toBeTruthy();
+  });
+
+  it('multiple onChange', () => {
+    const wrapper = mount(
+      <Cascader multiple onChange={(values: (string | number)[][]) => values} />,
+    );
+    expect(wrapper).toBeTruthy();
+  });
 });

components/cascader/index.tsx

@@ -2,7 +2,8 @@ import * as React from 'react';
 import classNames from 'classnames';
 import RcCascader from 'rc-cascader';
 import type {
-  CascaderProps as RcCascaderProps,
+  SingleCascaderProps as RcSingleCascaderProps,
+  MultipleCascaderProps as RcMultipleCascaderProps,
   ShowSearchType,
   FieldNames,
   BaseOptionType,
@@ -80,8 +81,16 @@ const defaultSearchRender: ShowSearchType['render'] = (inputValue, path, prefixC
   return optionList;
 };
 
-export interface CascaderProps<DataNodeType>
-  extends Omit<RcCascaderProps, 'checkable' | 'options'> {
+type SingleCascaderProps = Omit<RcSingleCascaderProps, 'checkable' | 'options'> & {
+  multiple?: false;
+};
+type MultipleCascaderProps = Omit<RcMultipleCascaderProps, 'checkable' | 'options'> & {
+  multiple: true;
+};
+
+type UnionCascaderProps = SingleCascaderProps | MultipleCascaderProps;
+
+export type CascaderProps<DataNodeType> = UnionCascaderProps & {
   multiple?: boolean;
   size?: SizeType;
   bordered?: boolean;