我正在尝试使用date-fns比较两个UTC格式的日期,但是不成功。这两个值看起来相同,但是isEquals()函数返回false。
下面代码的目的是搜索标记的日程安排,并检查它们是否符合数组range的时间,如果存在兼容的日程安排,则将其插入常量日期并返回对象。
import React, { useState, useEffect } from 'react';
import { utcToZonedTime } from 'date-fns-tz';
import {
format,
setHours,
setMinutes,
setSeconds,
isBefore,
isEqual,
parseISO,
} from 'date-fns';
import enUS from 'date-fns/locale/en-US';
import api from '~/services/api';
const range = [8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20];
export default function Dashboard() {
const [date, setDate] = useState(new Date());
useEffect(() => {
async function loadSchedule() {
const response = await api.get('schedule', {
params: { date },
});
const timezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
const data = range.map((hour) => {
const checkDate = setSeconds(setMinutes(setHours(date, hour), 0), 0);
const compareDate = utcToZonedTime(checkDate, timezone);
return {
time: `${hour}:00h`,
past: isBefore(compareDate, new Date()),
appointment: response.data.find((appoint) =>
isEqual(parseISO(appoint.date), compareDate)
),
};
});
setSchedule(data);
}
loadSchedule();
}, [date]);
}
我写了一个测试代码,在Reactotron上打印出结果,以下是打印的值:
console.tron.log(`${isEqual(parseISO(response.data[1].date),
compareDate)}\n
${parseISO(response.data[1].date)}\n${compareDate}`);
结果:
false
Wed Jun 10 2020 19:00:00 GMT-0300 (Brasilia Standard Time)
Wed Jun 10 2020 19:00:00 GMT-0300 (Brasilia Standard Time)
每个日期的实际值:
console.tron.log(`${response.data[1].date}\n${compareDate}`);
2020-06-10T22:00:00.000Z
Wed Jun 10 2020 20:00:00 GMT-0300 (Brasilia Standard Time)
但如果我只打印compareDate变量的值,它会改变格式:
console.tron.log(compareDate);
2020-06-10T21:00:00.002Z
.toISOString()
以进行检查。 - Matt Johnson-Pintconsole.tron.log(${parseISO(response.data[1].date)}\n${response.data[1].date.toISOString()});
- Leonardo Freua