feat(Calendar): expose getSelectedDate method

packages/vant/src/calendar/Calendar.tsx

@@ -214,6 +214,8 @@ export default defineComponent({
       return !currentDate.value;
     });
 
+    const getSelectedDate = () => currentDate.value;
+
     // calculate the position of the elements
     // and find the elements that needs to be rendered
     const onScroll = () => {
@@ -554,6 +556,7 @@ export default defineComponent({
     useExpose<CalendarExpose>({
       reset,
       scrollToDate,
+      getSelectedDate,
     });
 
     onMountedOrActivated(init);

packages/vant/src/calendar/README.md

@@ -348,6 +348,7 @@ Use [ref](https://v3.vuejs.org/guide/component-template-refs.html) to get Calend
 | --- | --- | --- | --- |
 | reset | Reset selected date, will reset to default date when no params passed | _date?: Date \| Date[]_ | - |
 | scrollToDate | Scroll to date | _date: Date_ | - |
+| getSelectedDate | get selected date | - | _Date \| Date[] \| null_ |
 
 ### Types
 

packages/vant/src/calendar/README.zh-CN.md

@@ -354,6 +354,7 @@ export default {
 | --- | --- | --- | --- |
 | reset | 将选中的日期重置到指定日期，未传参时会重置到默认日期 | _date?: Date \| Date[]_ | - |
 | scrollToDate | 滚动到某个日期 | _date: Date_ | - |
+| getSelectedDate | 获取选中的日期 | - | _Date \| Date[] \| null_ |
 
 ### 类型定义
 

packages/vant/src/calendar/types.ts

@@ -29,6 +29,7 @@ export type CalendarDayItem = {
 export type CalendarExpose = {
   reset: (date?: Date | Date[]) => void;
   scrollToDate: (targetDate: Date) => void;
+  getSelectedDate: () => Date | Date[] | null;
 };
 
 export type CalendarInstance = ComponentPublicInstance<