Js判断日期是昨天、今天或明天，以及从日期中分别取出年月日时分秒

let yesterdayStr = '2022-01-10 12:20:45'
let todayStr = '2022-01-11 09:18:22'
let tomorrowStr = '2022-01-12 10:22:34'
let dayAfterTomorrow = '2022-01-13 10:23:34'

/*
* 判断昨今明
* */
function caleDate(dayStr) {
    dayStr = new Date(dayStr).setHours(0, 0, 0, 0);
    let today = new Date().setHours(0, 0, 0, 0);
    let dateObj = {
        '-86400000': '昨天',
        0: '今天',
        86400000: '明天'
    }
    return dateObj[dayStr - today] || '超出昨今明范围';
}

console.log(caleDate(yesterdayStr))
console.log(caleDate(todayStr))
console.log(caleDate(tomorrowStr))
console.log(caleDate(dayAfterTomorrow))

/*
* 获取年月日时分秒
* */
function getDate(dateStr) {
    let timeArr = dateStr.replace(" ", ":").replace(/\:/g, "-").split("-");
    if (timeArr.length < 6) return '格式错误'
    let result = {
        year: timeArr[0],
        month: timeArr[1],
        day: timeArr[2],
        hour: timeArr[3],
        minute: timeArr[4],
        seconds: timeArr[5]
    }
    return result;
}

console.log(getDate(yesterdayStr))
console.log(getDate('传一个错误格式'))