10 examples of 'javascript check date' in JavaScript

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function checkdate (m, d, y) {
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  //  discuss at: http://phpjs.org/functions/checkdate/
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  // original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
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  // improved by: Pyerre
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  // improved by: Theriault
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  //   example 1: checkdate(12, 31, 2000);
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  //   returns 1: true
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  //   example 2: checkdate(2, 29, 2001);
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  //   returns 2: false
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  //   example 3: checkdate(3, 31, 2008);
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  //   returns 3: true
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  //   example 4: checkdate(1, 390, 2000);
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  //   returns 4: false
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  return m > 0 && m < 13 && y > 0 && y < 32768 && d > 0 && d <= (new Date(y, m, 0))
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    .getDate()
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}

347
function checkDate(m, d, y) {
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    return m > 0 && m < 13 && y > 0 && y < 32768 && d > 0 && d <= (new Date(y, m, 0)).getDate();
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}

106
function dateHandler(date) {
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		var
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      dArray, // 数组化后的日期
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      ret;
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		if (typeof date === 'string') { // 如果date参数是string类型
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			if (rNumberstring.test(date)) { // 如果date参数是number string类型
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        ret = new Date(date);
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			} else { // 这里重新格式化,一般都是从服务端过来的数据,必须有年月日,并且顺序是年月日时分秒毫秒,并且7个值之间有间隔符,间隔符为\D
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				dArray = date.match(rDatestring); // 从string中提取new Date需要的参数
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				if(dArray.length < 3) { // 服务端时间戳,例如NET "/Date(562941040500+0800)/"
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          ret = new Date(+dArray[0]);
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				} else { // 格式化过的
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          ret = new Date(dArray[0], dArray[1] - 1, dArray[2] || 1, dArray[3] || 0, dArray[4] || 0, dArray[5] || 0, dArray[6] || 0);
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				}
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			}
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		} else if (typeof date === 'number' || Object.prototype.toString.call(date) === '[object Date]') { // 如果date参数是number类型、date类型
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      ret = new Date(+date);
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		} else if (date == null) { // 如果不存在date参数
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      ret = new Date();
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		} else {
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      return false;
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    }
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		return ret;
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	}

65
function getDateObj(myDate: any): Date | null {
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    if (myDate == null) {
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        return null;
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    }
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    if (myDate instanceof String || typeof myDate === 'string') {
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        return new Date('' + myDate);
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    }
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    // A Firebase Timestamp format
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    if (myDate && (myDate.seconds >= 0 || myDate.seconds < 0) && (myDate.nanoseconds >= 0 || myDate.nanoseconds < 0)) {
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        return new Date(myDate.toDate());
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    }
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    return myDate;
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}

27
static checkDate(longTime) {
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  return false;
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  let currentDate = new Date();
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  let targetDate = new Date();
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  targetDate.setTime(longTime);
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  if (currentDate.getMonth() !== targetDate.getMonth()) return false;
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  if (currentDate.getDate() !== targetDate.getDate()) return false;
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  if (currentDate.getHours() - targetDate.getHours() > 4) return false;
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  return true;
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}

127
function updateDate() {
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	var unix = parseDateString($("#input").val());
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	$('#unix').text(unix);
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	if(unix!==null) {
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		var date = new Date(unix*1000);
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		$('#text').text(date.toString());
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	} else {
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		$('#text').text('');
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	}
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}

269
function isMonday(date){
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  var day = new Date (date);
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  timeDiff = checkDST(day);
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  day.setHours(day.getHours() + timeDiff);
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  if(day.getDay() !== 1 && day.getDay() !== 0) {//accepted Sunday for Islamic calendar
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    $('#confirm').text(textSpecifyDay);
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    setTimeout(removeMsg, 4000);
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    return false;
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  };
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  return true;
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};

8
function DateCheck(frmMo, frmDy, frmYr)
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{
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  var returnCode;
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  var cdtStr, fdtStr;
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  var cdt = new Date();
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  //cdtStr = cdt.getYear().toString() + ZeroPad(cdt.getMonth() + 1, 2).toString() + ZeroPad(cdt.getDate(), 2).toString()
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  cdtStr = 20070205
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  fdtStr = frmYr + ZeroPad(frmMo, 2) + ZeroPad(frmDy, 2);
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  var frmDate = ZeroPad(frmMo, 2) + '/' + ZeroPad(frmDy, 2) + '/' + frmYr;
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  compareDate = new Date(frmDate);
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  var newDate = ZeroPad(compareDate.getMonth() + 1, 2) + '/' + ZeroPad(compareDate.getDate(), 2) + '/' + frmYr;
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  if (frmDate != newDate)
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  {
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    alert(frmDate + ' is not a valid date!');
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    returnCode = false;
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  }
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  else
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  {
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    if (fdtStr > cdtStr)
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    {
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      alert(frmDate + ' is an invalid BirthDate (greater than current date).\n\nYou have entered: ' + frmDate + ' as a birthdate.\n' + cdtStr + ' is the current date.\n');
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      returnCode = false;
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    }
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    else
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      returnCode = true;
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  }
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  return (returnCode);
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}

35
export function dateInputCheckInput(evt) {
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	if(!evt) {
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		evt = window.event;
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		if(!evt) {
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			return;
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		}
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	}
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	let c = evt.target || evt.srcElement;
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	dateInputRepairValueIn(c);
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}

32
function checkDay(){
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    var pre_time = localStorage['today'];
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    var now_time = new Date().getDay();
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    if (pre_time == now_time){
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        return false;
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    }else{
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        return now_time;
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    }
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}