fix(datepicker): 修复空字符串页面崩溃问题

src/date-picker/DatePicker.tsx

@@ -7,7 +7,7 @@ import { useGlobalIcon } from '../hooks/useGlobalIcon';
 import useSingle from './hooks/useSingle';
 import {
   parseToDayjs, getDefaultFormat, formatTime, formatDate,
-} from './hooks/useFormat';
+} from '../_common/js/date-picker/format';
 import { subtractMonth, addMonth, extractTimeObj } from '../_common/js/date-picker/utils';
 import type { DateValue } from './type';
 import props from './props';

src/date-picker/DatePickerPanel.tsx

@@ -2,7 +2,7 @@ import { defineComponent, computed } from '@vue/composition-api';
 import dayjs from 'dayjs';
 
 import useSingleValue from './hooks/useSingleValue';
-import { formatDate, getDefaultFormat } from './hooks/useFormat';
+import { formatDate, getDefaultFormat } from '../_common/js/date-picker/format';
 import { subtractMonth, addMonth, extractTimeObj } from '../_common/js/date-picker/utils';
 import type {
   DateValue,

src/date-picker/DateRangePicker.tsx

@@ -15,7 +15,7 @@ import useRange from './hooks/useRange';
 import { initYearMonthTime } from './hooks/useRangeValue';
 import {
   parseToDayjs, formatTime, formatDate, isValidDate, getDefaultFormat,
-} from './hooks/useFormat';
+} from '../_common/js/date-picker/format';
 import { subtractMonth, addMonth, extractTimeObj } from '../_common/js/date-picker/utils';
 
 export default defineComponent({

src/date-picker/DateRangePickerPanel.tsx

@@ -13,7 +13,7 @@ import {
 
 import TRangePanel from './panel/RangePanel';
 import useRangeValue from './hooks/useRangeValue';
-import { formatDate, getDefaultFormat } from './hooks/useFormat';
+import { formatDate, getDefaultFormat } from '../_common/js/date-picker/format';
 import { subtractMonth, addMonth, extractTimeObj } from '../_common/js/date-picker/utils';
 
 export default defineComponent({

src/date-picker/base/Table.tsx

@@ -2,7 +2,7 @@ import { defineComponent, PropType, computed } from '@vue/composition-api';
 import TDatePickerCell from './Cell';
 import { useConfig, usePrefixClass } from '../../hooks/useConfig';
 import type { TdDatePickerProps } from '../type';
-import { parseToDayjs } from '../hooks/useFormat';
+import { parseToDayjs } from '../../_common/js/date-picker/format';
 
 export default defineComponent({
   name: 'TDatePickerTable',

src/date-picker/hooks/useRange.ts

@@ -3,7 +3,7 @@ import dayjs from 'dayjs';
 import { usePrefixClass, useConfig } from '../../hooks/useConfig';
 
 import { TdDateRangePickerProps, DateValue } from '../type';
-import { isValidDate, formatDate, getDefaultFormat } from './useFormat';
+import { isValidDate, formatDate, getDefaultFormat } from '../../_common/js/date-picker/format';
 import useRangeValue from './useRangeValue';
 
 export const PARTIAL_MAP = { first: 'start', second: 'end' };

src/date-picker/hooks/useRangeValue.ts

@@ -6,8 +6,12 @@ import useVModel from '../../hooks/useVModel';
 
 import { TdDateRangePickerProps, DateRangeValue } from '../type';
 import {
-  isValidDate, formatDate, formatTime, getDefaultFormat, parseToDayjs,
-} from './useFormat';
+  isValidDate,
+  formatDate,
+  formatTime,
+  getDefaultFormat,
+  parseToDayjs,
+} from '../../_common/js/date-picker/format';
 import { extractTimeFormat } from '../../_common/js/date-picker/utils';
 
 export const PARTIAL_MAP = { first: 'start', second: 'end' };

src/date-picker/hooks/useSingle.ts

@@ -5,7 +5,7 @@ import { usePrefixClass, useConfig } from '../../hooks/useConfig';
 import { TdDatePickerProps, DateValue } from '../type';
 import {
   isValidDate, formatDate, formatTime, getDefaultFormat,
-} from './useFormat';
+} from '../../_common/js/date-picker/format';
 import useSingleValue from './useSingleValue';
 
 export default function useSingle(props: TdDatePickerProps, { emit }: any) {

src/date-picker/hooks/useSingleValue.ts

@@ -4,7 +4,7 @@ import {
 import dayjs from 'dayjs';
 import {
   formatDate, formatTime, isValidDate, getDefaultFormat,
-} from './useFormat';
+} from '../../_common/js/date-picker/format';
 import useVModel from '../../hooks/useVModel';
 import { TdDatePickerProps } from '../type';
 import { extractTimeFormat } from '../../_common/js/date-picker/utils';

src/date-picker/panel/PanelContent.tsx

@@ -5,7 +5,7 @@ import type { TdDatePickerProps } from '../type';
 import TDateHeader from '../base/Header';
 import TDateTable from '../base/Table';
 import TTimePickerPanel from '../../time-picker/panel/time-picker-panel';
-import { getDefaultFormat } from '../hooks/useFormat';
+import { getDefaultFormat } from '../../_common/js/date-picker/format';
 
 export default defineComponent({
   name: 'TPanelContent',

src/date-picker/panel/RangePanel.tsx

@@ -3,7 +3,7 @@ import { useConfig, usePrefixClass } from '../../hooks/useConfig';
 import TPanelContent from './PanelContent';
 import TExtraContent from './ExtraContent';
 import { TdDateRangePickerProps } from '../type';
-import { getDefaultFormat, parseToDayjs } from '../hooks/useFormat';
+import { getDefaultFormat, parseToDayjs } from '../../_common/js/date-picker/format';
 import useTableData from '../hooks/useTableData';
 import useDisableDate from '../hooks/useDisableDate';
 

src/date-picker/panel/SinglePanel.tsx

@@ -3,7 +3,7 @@ import { useConfig, usePrefixClass } from '../../hooks/useConfig';
 import TPanelContent from './PanelContent';
 import TExtraContent from './ExtraContent';
 import { TdDatePickerProps } from '../type';
-import { getDefaultFormat, parseToDayjs } from '../hooks/useFormat';
+import { getDefaultFormat, parseToDayjs } from '../../_common/js/date-picker/format';
 import useTableData from '../hooks/useTableData';
 import useDisableDate from '../hooks/useDisableDate';