使用joda-js并完成它:

import { DateTimeFormatter, LocalDateTime } from 'js-joda'

const now = LocalDateTime.now()
now.format(DateTimeFormatter.ofPattern('yyyyMMdd-HH:mm:ss'))
// Outputs: 20221104-09:25:09 according to your timezone (mine is 'America/New_York'

在大多数情况下(没有时区处理)，这就足够了:

date.toISOString().substring(0,10)

例子

var date = new Date();
console.log(date.toISOString()); // 2022-07-04T07:14:08.925Z
console.log(date.toISOString().substring(0,10)); // 2022-07-04

var d = new Date("Sun May 1,2014"); var year = d.getFullYear(); var month = d.getMonth() + 1; var day = d.getDate(); month = checkZero(month); day = checkZero(day); var date = ""; date += year; date += "-"; date += month; date += "-"; date += day; document.querySelector("#display").innerHTML = date; function checkZero(i) { if (i < 10) { i = "0" + i }; // add zero in front of numbers < 10 return i; } <div id="display"></div>

你可以:

函数formatDate(日期){ var d = new Date(日期)， 月= " + (d.getMonth() + 1) "， day = " + d.getDate()， year = d.g getfullyear (); 如果(月。长度< 2) 月= '0' +月; 如果一天。长度< 2) Day = '0' + Day; 返回[年，月，日].join('-'); ｝ console.log(formatDate('Sun May 11,2014'));

使用的例子:

console.log(formatDate('Sun May 11,2014'));

输出:

2014-05-11

JSFiddle的演示:http://jsfiddle.net/abdulrauf6182012/2Frm3/

不需要库

纯JavaScript。

下面的例子是从今天开始的两个月:

var d = new Date() d.setMonth(d.getMonth() - 2); var dateString =新的日期(d); console.log('格式化前'，dateString， '格式化后'，dateString. toisostring ().slice(0,10))

之前的一些答案是可以的，但是不是很灵活。我想要一些能够真正处理更多边缘情况的东西，所以我采用了@orangleliu的答案并扩展了它。https://jsfiddle.net/8904cmLd/1/

function DateToString(inDate, formatString) {
    // Written by m1m1k 2018-04-05

    // Validate that we're working with a date
    if(!isValidDate(inDate))
    {
        inDate = new Date(inDate);
    }

    // See the jsFiddle for extra code to be able to use DateToString('Sun May 11,2014', 'USA');
    //formatString = CountryCodeToDateFormat(formatString);

    var dateObject = {
        M: inDate.getMonth() + 1,
        d: inDate.getDate(),
        D: inDate.getDate(),
        h: inDate.getHours(),
        m: inDate.getMinutes(),
        s: inDate.getSeconds(),
        y: inDate.getFullYear(),
        Y: inDate.getFullYear()
    };

    // Build Regex Dynamically based on the list above.
    // It should end up with something like this: "/([Yy]+|M+|[Dd]+|h+|m+|s+)/g"
    var dateMatchRegex = joinObj(dateObject, "+|") + "+";
    var regEx = new RegExp(dateMatchRegex,"g");
    formatString = formatString.replace(regEx, function(formatToken) {
        var datePartValue = dateObject[formatToken.slice(-1)];
        var tokenLength = formatToken.length;

        // A conflict exists between specifying 'd' for no zero pad -> expand
        // to '10' and specifying yy for just two year digits '01' instead
        // of '2001'.  One expands, the other contracts.
        //
        // So Constrict Years but Expand All Else
        if (formatToken.indexOf('y') < 0 && formatToken.indexOf('Y') < 0)
        {
            // Expand single digit format token 'd' to
            // multi digit value '10' when needed
            var tokenLength = Math.max(formatToken.length, datePartValue.toString().length);
        }
        var zeroPad = (datePartValue.toString().length < formatToken.length ? "0".repeat(tokenLength) : "");
        return (zeroPad + datePartValue).slice(-tokenLength);
    });

    return formatString;
}

使用示例:

DateToString('Sun May 11,2014', 'MM/DD/yy');
DateToString('Sun May 11,2014', 'yyyy.MM.dd');
DateToString(new Date('Sun Dec 11,2014'),'yy-M-d');