types(Picker): fix return type of getSelectedOptions

packages/vant/src/picker/Picker.tsx

@@ -259,7 +259,10 @@ export default defineComponent({
             options.length &&
             !isOptionExist(options, selectedValues.value[index], fields.value)
           ) {
-            setValue(index, getFirstEnabledOption(options)[fields.value.value]);
+            setValue(
+              index,
+              getFirstEnabledOption(options)![fields.value.value]
+            );
           }
         });
       },

packages/vant/src/picker/README.md

@@ -358,7 +358,7 @@ Use [ref](https://v3.vuejs.org/guide/component-template-refs.html) to get Picker
 | Name | Description | Attribute | Return value |
 | --- | --- | --- | --- |
 | confirm | Stop scrolling and emit confirm event | - | - |
-| getSelectedOptions | Get current selected options | - | _PickerOption[]_ |
+| getSelectedOptions | Get current selected options | - | _(PickerOption \| undefined)[]_ |
 
 ### Types
 

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

@@ -377,7 +377,7 @@ export default {
 | 方法名 | 说明 | 参数 | 返回值 |
 | --- | --- | --- | --- |
 | confirm | 停止惯性滚动并触发 `confirm` 事件 | - | - |
-| getSelectedOptions | 获取当前选中的选项 | - | _PickerOption[]_ |
+| getSelectedOptions | 获取当前选中的选项 | - | _(PickerOption \| undefined)[]_ |
 
 ### 类型定义
 

packages/vant/src/picker/types.ts

@@ -24,7 +24,7 @@ export type PickerColumn = PickerOption[];
 
 export type PickerExpose = {
   confirm: () => void;
-  getSelectedOptions: () => PickerOption[];
+  getSelectedOptions: () => Array<PickerOption | undefined>;
 };
 
 export type PickerColumnProvide = {
@@ -45,7 +45,7 @@ export type PickerInstance = ComponentPublicInstance<PickerProps, PickerExpose>;
 
 export type PickerConfirmEventParams = {
   selectedValues: Array<number | string>;
-  selectedOptions: PickerOption[];
+  selectedOptions: Array<PickerOption | undefined>;
 };
 
 export type PickerCancelEventParams = PickerConfirmEventParams;

packages/vant/src/picker/utils.ts

@@ -2,9 +2,10 @@ import { isDef, clamp, extend } from '../utils';
 import type { Ref } from 'vue';
 import type { PickerOption, PickerColumn, PickerFieldNames } from './types';
 
-export function getFirstEnabledOption(options: PickerOption[]) {
-  return options.find((option) => !option.disabled) || options[0];
-}
+export const getFirstEnabledOption = (
+  options: PickerOption[]
+): PickerOption | undefined =>
+  options.find((option) => !option.disabled) || options[0];
 
 export function getColumnsType(
   columns: PickerColumn | PickerColumn[],
@@ -50,7 +51,7 @@ export function findOptionByValue(
   options: PickerOption[],
   value: number | string,
   fields: Required<PickerFieldNames>
-) {
+): PickerOption | undefined {
   const index = options.findIndex((option) => option[fields.value] === value);
   const enabledIndex = findIndexOfEnabledOption(options, index);
   return options[enabledIndex];
@@ -77,7 +78,7 @@ export function formatCascadeColumns(
       : undefined;
 
     if (!cursor && options.length) {
-      const firstValue = getFirstEnabledOption(options)[fields.value];
+      const firstValue = getFirstEnabledOption(options)![fields.value];
       cursor = findOptionByValue(options, firstValue, fields);
     }