时间格式化判断空字符

src/utils/dateUtil.ts

@@ -7,11 +7,11 @@ const DATE_TIME_FORMAT = 'YYYY-MM-DD HH:mm:ss';
 const DATE_FORMAT = 'YYYY-MM-DD';
 
 export function formatToDateTime(date?: dayjs.ConfigType, format = DATE_TIME_FORMAT): string {
-  return dayjs(date).format(format);
+  return  date ? dayjs(date).format(format) : '';
 }
 
 export function formatToDate(date?: dayjs.ConfigType, format = DATE_FORMAT): string {
-  return dayjs(date).format(format);
+  return date ? dayjs(date).format(format) : '';
 }
 
 export const dateUtil = dayjs;