10 examples of 'javascript date format yyyy mm dd' in JavaScript

8
static formatDateYYYYMMDD(date) {
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  return DateFormatter.format(date, "yyyy-MM-dd");
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}

64
function dateToYYYYMMDD (date) {
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  if (date instanceof Date) {
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    return [
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      date.getFullYear(),
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      String(date.getMonth() + 1).padStart(2, 0),
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      String(date.getDate()).padStart(2, 0),
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    ].join("");
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  }
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  // TODO: better checking here?
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  return date;
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}

40
export function yyyymmdd(date) {
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	date = date || new Date()
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	return date.getFullYear() +
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		pad2(date.getMonth() + 1) +
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		pad2(date.getDate())
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}

11
format (fmt = 'yyyy-MM-dd HH:mm:ss') {
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  const obj = {
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    'y+': this.date.getFullYear(),
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    'M{2}': this._paddingZero(this.date.getMonth() + 1),
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    'd{2}': this._paddingZero(this.date.getDate()),
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    'H{2}': this._paddingZero(this.date.getHours()),
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    'h{2}': this._paddingZero(this.date.getHours() % 12),
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    'm{2}': this._paddingZero(this.date.getMinutes()),
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    's{2}': this._paddingZero(this.date.getSeconds()),
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    'M': this.date.getMonth() + 1,
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    'd': this.date.getDate(),
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    'H': this.date.getHours(),
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    'h': this.date.getHours() % 12,
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    'm': this.date.getMinutes(),
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    's': this.date.getSeconds(),
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    'W': this.date.getDay()
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  }
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  for (let [key, ] of Object.entries(obj)) {
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    const regexp = new RegExp(`(${key})([^a-zA-Z])?`)
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    if (regexp.test(fmt)) {
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      fmt = fmt.replace(RegExp.$1, obj[key])
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    }
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  }
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  return fmt
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}

180
export function dateFormat(timestamp, format = 'yyyy-MM-dd hh:mm:ss') {
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  timestamp = timestamp.length === 13 ? timestamp : timestamp * 1000
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  let date = new Date(timestamp)
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  let args = {
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    'M+': date.getMonth() + 1,
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    'd+': date.getDate(),
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    'h+': date.getHours(),
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    'm+': date.getMinutes(),
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    's+': date.getSeconds()
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  }
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  if (/(y+)/.test(format)) {
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    format = format.replace(
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      RegExp.$1,
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      (date.getFullYear() + '').substr(4 - RegExp.$1.length)
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    )
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  }
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  for (var i in args) {
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    let n = args[i]
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    if (new RegExp('(' + i + ')').test(format)) {
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      format = format.replace(
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        RegExp.$1,
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        RegExp.$1.length === 1 ? n : ('00' + n).substr(('' + n).length)
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      )
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    }
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  }
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  return format
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}

129
function dateFormat(d) {
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  let month = d.getMonth() + 1;
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  let date = d.getDate();
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  if (month < 10) month = `0${month}`;
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  if (date < 10) date = `0${date}`;
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  return `${d.getFullYear()}-${month}-${date}`;
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}

11
function formatDate(date, fmt) { //author: meizz 
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    var o = {
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        "M+": date.getMonth() + 1, //月份 
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        "d+": date.getDate() //日 
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    };
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    if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (date.getFullYear() + "").substr(4 - RegExp.$1.length));
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    for (var k in o) {
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        if (new RegExp("(" + k + ")").test(fmt))
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            fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
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    }
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    return fmt;
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}

486
formatDate(d) {
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  const calendar = this;
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  const date = new Date(d);
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  const year = date.getFullYear();
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  const month = date.getMonth();
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  const month1 = month + 1;
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  const day = date.getDate();
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  const weekDay = date.getDay();
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  const { monthNames, monthNamesShort, dayNames, dayNamesShort } = calendar;
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  const { dateFormat, locale } = calendar.params;
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  if (typeof dateFormat === 'string') {
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    return dateFormat
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      .replace(/yyyy/g, year)
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      .replace(/yy/g, String(year).substring(2))
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      .replace(/mm/g, month1 < 10 ? `0${month1}` : month1)
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      .replace(/m(\W+)/g, `${month1}$1`)
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      .replace(/MM/g, monthNames[month])
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      .replace(/M(\W+)/g, `${monthNamesShort[month]}$1`)
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      .replace(/dd/g, day < 10 ? `0${day}` : day)
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      .replace(/d(\W+)/g, `${day}$1`)
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      .replace(/DD/g, dayNames[weekDay])
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      .replace(/D(\W+)/g, `${dayNamesShort[weekDay]}$1`);
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  }
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  if (typeof dateFormat === 'function') {
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    return dateFormat(date);
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  }
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  // Intl Object
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  const formatter = new Intl.DateTimeFormat(locale, dateFormat);
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  return formatter.format(date);
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}

5
var formatDate = function formatDate(date) {
6
  var format = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'yyyy-MM-dd hh:mm:ss';
7
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  if (!date) return;
9
  var Y = date.getFullYear();
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  var M = date.getMonth() + 1;
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  var D = date.getDate();
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  var h = date.getHours();
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  var m = date.getMinutes();
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  var s = date.getSeconds();
15
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  var rules = {
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    yyyy: Y,
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    M: M,
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    MM: formatNumber(M),
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    d: D,
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    dd: formatNumber(D),
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    h: h,
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    hh: formatNumber(h),
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    m: m,
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    mm: formatNumber(m),
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    s: s,
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    ss: formatNumber(s)
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  };
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  var arr = format.split(/-| |:|\//);
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  var formatDate = format;
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  for (var i = 0; i < arr.length; i++) {
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    var el = arr[i];
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    formatDate = formatDate.replace(el, rules[el]);
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  }
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  return formatDate;
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};

17
function formatDate(value) {
18
    return value ? Ext.Date.dateFormat(value, 'M d, Y') : '';
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}