JS如何获取未来n天的时间(返回日期:yyyy-mm-dd,并且判断是否是今天和星期)_Javascript

js获取未来n天的时间(返回日期：yyyy-mm-dd,并且判断是否是今天，和星期)

2024.02.02（今天）如果传入5则获取未来5天的时间数组

[
	{date: "2024-02-02,"istoday: true,week: "星期五"},
	{date: "2024-02-03,"istoday: false,week: "星期六"},
	{date: "2024-02-04,"istoday: false,week: "星期日"},
	{date: "2024-02-05,"istoday: false,week: "星期一"},
	{date: "2024-02-06,"istoday: false,week: "星期二"},
]

initpredictiontime(num) {
    // 获取今天的日期
    let today = new date();
    // 定义星期的数组
    let weekdays = [
        "星期天",
        "星期一",
        "星期二",
        "星期三",
        "星期四",
        "星期五",
        "星期六",
    ];
    // 获取今天是一周中的第几天（星期几）
    this.predictionweek = weekdays[today.getday()];
    // 今天及接下来一周的日期和星期几
    const result = [];
    for (let i = 1; i <= num; i++) {
        const datestring =
              today.getfullyear() +
              "-" +
              (today.getmonth() + 1).tostring().padstart(2, "0") +
              "-" +
              today.getdate().tostring().padstart(2, "0");
        const week = weekdays[today.getday()];
        result.push({ week, date: datestring });
        today.setdate(today.getdate() + 1);
    }
    result.find(item => item.week === this.predictionweek).istoday = true;
    return result;
},

js获取近n天的日期,返回'yyyy-mm-dd'格式

开发中经常遇到获取时间的业务，将常用的方法做个笔记记录下。

<html>
<head lang="en">
    <meta charset="utf-8">
    <title></title>
</head>
<body>
<script>
    function getrecentday(day){
        var today = new date();
        var targetday_milliseconds=today.gettime() + 1000*60*60*24*day;
        today.settime(targetday_milliseconds);
        var tyear = today.getfullyear();
        var tmonth = today.getmonth();
        var tdate = today.getdate();
        tmonth = dohandlemonth(tmonth + 1);
        tdate = dohandlemonth(tdate);
        return tyear+"-"+tmonth+"-"+tdate;
    }
    function dohandlemonth(month){
        var m = month;
        if(month.tostring().length == 1){
            m = "0" + month;
        }
        return m;
    }
    console.log("半年前："+getrecentday(-180));
    console.log("三月前："+getrecentday(-90));
    console.log("一月前："+getrecentday(-30));
    console.log("昨天："+getrecentday(-1));
    console.log("今天："+getrecentday(0));
    console.log("明天："+getrecentday(1));
    console.log("后天："+getrecentday(2));
    console.log("一月后："+getrecentday(30));
    console.log("三月后："+getrecentday(90));
    console.log("半年后："+getrecentday(180));
</script>
</body>
</html>