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');

2021年的解决方案使用Intl。

现在所有浏览器都支持新的Intl对象。 您可以通过选择使用所需格式的“区域设置”来选择格式。

瑞典语言环境使用的格式是"yyyy-mm-dd":

// Create a date
const date = new Date(2021, 10, 28);

// Create a formatter using the "sv-SE" locale
const dateFormatter = Intl.DateTimeFormat('sv-SE');

// Use the formatter to format the date
console.log(dateFormatter.format(date)); // "2021-11-28"

使用Intl的缺点:

使用此方法不能“取消格式化”或“解析”字符串 你必须搜索所需的格式(例如在维基百科上)，不能使用像“yyyy-mm-dd”这样的格式字符串。

函数 myYmd（D）{ var pad = function（num） { 变量 s = '0' + 数字; 返回 s.substr（s.length - 2）; } var Result = D.getFullYear（） + '-' + pad（（D.getMonth（） + 1）） + '-' + pad（D.getDate（））; 返回结果; } var datemilli = new Date（'Sun May 11，2014'）; document.write（myYmd（datemilli））;

你可以在Date对象上使用toLocaleDateString('fr-CA')

console.log（new Date（'Sun May 11，2014'）.toLocaleDateString（'fr-CA'））;

我还发现，这些地区给正确的结果从这个地区列表所有地区和他们的短代码列表?

'en-CA'
'fr-CA'
'lt-LT'
'sv-FI'
'sv-SE'

var localesList = ["af-ZA", "am-ET", "ar-AE", "ar-BH", "ar-DZ", "ar-EG", "ar-IQ", "ar-JO", "ar-KW", "ar-LB", "ar-LY", "ar-MA", "arn-CL", "ar-OM", "ar-QA", "ar-SA", "ar-SY", "ar-TN", "ar-YE", "as-IN", "az-Cyrl-AZ", "az-Latn-AZ", "ba-RU", "be-BY", "bg-BG", "bn-BD", "bn-IN", "bo-CN", "br-FR", "bs-Cyrl-BA", "bs-Latn-BA", "ca-ES", "co-FR", "cs-CZ", "cy-GB", "da-DK", "de-AT", "de-CH", "de-DE", "de-LI", "de-LU", "dsb-DE", "dv-MV", "el-GR", "en-029", "en-AU", "en-BZ", "en-CA", "en-GB", "en-IE", "en-IN", "en-JM", "en-MY", "en-NZ", "en-PH", "en-SG", "en-TT", "en-US", "en-ZA", "en-ZW", "es-AR", "es-BO", "es-CL", "es-CO", "es-CR", "es-DO", "es-EC", "es-ES", "es-GT", "es-HN", "es-MX", "es-NI", "es-PA", "es-PE", "es-PR", "es-PY", "es-SV", "es-US", "es-UY", "es-VE", "et-EE", "eu-ES", "fa-IR", "fi-FI", "fil-PH", "fo-FO", "fr-BE", "fr-CA", "fr-CH", "fr-FR", "fr-LU", "fr-MC", "fy-NL", "ga-IE", "gd-GB", "gl-ES", "gsw-FR", "gu-IN", "ha-Latn-NG", "he-IL", "hi-IN", "hr-BA", "hr-HR", "hsb-DE", "hu-HU", "hy-AM", "id-ID", "ig-NG", "ii-CN", "is-IS", "it-CH", "it-IT", "iu-Cans-CA", "iu-Latn-CA", "ja-JP", "ka-GE", "kk-KZ", "kl-GL", "km-KH", "kn-IN", "kok-IN", "ko-KR", "ky-KG", "lb-LU", "lo-LA", "lt-LT", "lv-LV", "mi-NZ", "mk-MK", "ml-IN", "mn-MN", "mn-Mong-CN", "moh-CA", "mr-IN", "ms-BN", "ms-MY", "mt-MT", "nb-NO", "ne-NP", "nl-BE", "nl-NL", "nn-NO", "nso-ZA", "oc-FR", "or-IN", "pa-IN", "pl-PL", "prs-AF", "ps-AF", "pt-BR", "pt-PT", "qut-GT", "quz-BO", "quz-EC", "quz-PE", "rm-CH", "ro-RO", "ru-RU", "rw-RW", "sah-RU", "sa-IN", "se-FI", "se-NO", "se-SE", "si-LK", "sk-SK", "sl-SI", "sma-NO", "sma-SE", "smj-NO", "smj-SE", "smn-FI", "sms-FI", "sq-AL", "sr-Cyrl-BA", "sr-Cyrl-CS", "sr-Cyrl-ME", "sr-Cyrl-RS", "sr-Latn-BA", "sr-Latn-CS", "sr-Latn-ME", "sr-Latn-RS", "sv-FI", "sv-SE", "sw-KE", "syr-SY", "ta-IN", "te-IN", "tg-Cyrl-TJ", "th-TH", "tk-TM", "tn-ZA", "tr-TR", "tt-RU", "tzm-Latn-DZ", "ug-CN", "uk-UA", "ur-PK", "uz-Cyrl-UZ", "uz-Latn-UZ", "vi-VN", "wo-SN", "xh-ZA", "yo-NG", "zh-CN", "zh-HK", "zh-MO", "zh-SG", "zh-TW", "zu-ZA" ]; localesList.forEach(lcl => { if ("2014-05-11" === new Date('Sun May 11,2014').toLocaleDateString(lcl)) { console.log(lcl, new Date('Sun May 11,2014').toLocaleDateString(lcl)); } });

PHP兼容的日期格式

下面是一个小函数，它可以接受与PHP函数date()相同的参数，并在JavaScript中返回日期/时间字符串。

注意，并不是PHP中的所有date()格式选项都受支持。您可以扩展parts对象来创建缺少的格式令牌

/** * Date formatter with PHP "date()"-compatible format syntax. */ const formatDate = (format, date) => { if (!format) { format = 'Y-m-d' } if (!date) { date = new Date() } const parts = { Y: date.getFullYear().toString(), y: ('00' + (date.getYear() - 100)).toString().slice(-2), m: ('0' + (date.getMonth() + 1)).toString().slice(-2), n: (date.getMonth() + 1).toString(), d: ('0' + date.getDate()).toString().slice(-2), j: date.getDate().toString(), H: ('0' + date.getHours()).toString().slice(-2), G: date.getHours().toString(), i: ('0' + date.getMinutes()).toString().slice(-2), s: ('0' + date.getSeconds()).toString().slice(-2) } const modifiers = Object.keys(parts).join('') const reDate = new RegExp('(?<!\\\\)[' + modifiers + ']', 'g') const reEscape = new RegExp('\\\\([' + modifiers + '])', 'g') return format .replace(reDate, $0 => parts[$0]) .replace(reEscape, ($0, $1) => $1) } // ----- EXAMPLES ----- console.log( formatDate() ); // "2019-05-21" console.log( formatDate('H:i:s') ); // "16:21:32" console.log( formatDate('Y-m-d, o\\n H:i:s') ); // "2019-05-21, on 16:21:32" console.log( formatDate('Y-m-d', new Date(2000000000000)) ); // "2033-05-18"

Gist

以下是formatDate()函数的更新版本和其他示例的要点:https://gist.github.com/stracker-phil/c7b68ea0b1d5bbb97af0a6a3dc66e0d9

toISOString()假设日期是本地时间并将其转换为UTC。您将得到一个不正确的日期字符串。

下面的方法应该返回您需要的内容。

Date.prototype.yyyymmdd = function() {         

    var yyyy = this.getFullYear().toString();                                    
    var mm = (this.getMonth()+1).toString(); // getMonth() is zero-based         
    var dd  = this.getDate().toString();             

    return yyyy + '-' + (mm[1]?mm:"0"+mm[0]) + '-' + (dd[1]?dd:"0"+dd[0]);
};

来源:https://blog.justin.kelly.org.au/simple-javascript-function-to-format-the-date-as-yyyy-mm-dd/