@han41858/date-ex

date-ex

한국어

Extensions for Date class.

This library is extensions for JavaScript Date class. If you use this library, you can modify Date class more easily and represent Date in any format.

date-ex is written by TypeScript, and published by JavaScript. So you can use this library in TypeScript code and JavaScript code also.

DateTime

Represent date and time.

DataTime instance is created with new keyword.

const date: DateTime = new DateTime();

If you pass parameter to constructor, you can create instance with specific date. Parameter type supports for undefined, null, number , string, Date, DateTime, json type(DateTimeParam).

const newDateByNumber : DateTime = new DateTime(1603722868252);

const newDateByString : DateTime = new DateTime('2020-10-26');

const newDateByDate : DateTime = new DateTime(new Date());

const newDateByDateTime : DateTime = new DateTime(new DateTime());

const newDateByDateTimeParam : DateTime = new DateTime({
	year : 2020,
	month : 10,
	date : 26
});

Getter - Basic fields

Getter	Return type	Value Range	Description	Date methods
year	number	-	Returns year.	Date.getFullYear()
month	number	1 ~ 12	Returns month.	Date.getMonth()
date	number	1 ~ 31	Returns date.	Date.getDate()
day	number	0 ~ 6	Returns number of day.	Date.getDay()
hours	number	0 ~ 23	Returns hours.	Date.getHours()
minutes	number	0 ~ 59	Returns minutes.	Date.getMinutes()
seconds	number	0 ~ 59	Returns seconds.	Date.getSeconds()
ms	number	0 ~ 999	Returns milliseconds.	Date.getMilliseconds()
timezoneOffset	timezone	-	Returns timezone offset in minutes unit.	Date.getTimezoneOffset()

• Compared to the Date class, get- prefix has been omitted for better convenience, uses the getter method not the function execution form. For the same reason, getMilliseconds() methods is provided as ms.

• month field range is not 0 ~ 11. This field represent the real month value 1 ~ 12

Getter - Extended fields

Getter	Return type	Value Range	Description
quarter	number	1 ~ 4	Returns quarter of the date.
weekOfYear	number	1 ~ 53	Returns the number of week of the date in the year.
weekOfMonth	number	1 ~ 5	Returns the number of week of the date in the month.
weeksOfYear	number	52 ~ 53	Returns the number of week in year.
weeksOfMonth	number	4 ~ 6	Returns the number of week in month.
dayOfYear	number	1 ~ 365	Returns the number of day in the year.
daysOfYear	number	1 ~ 366	Returns the number of date in the year.
lastDate	number	28 ~ 31	Returns the last date of the month.
timezoneOffsetInHours	number	-12 ~ 14	Returns the timezone offset in hours unit.
isAm	boolean	true/false	Returns true for the morning and false for the afternoon.
hours24	number	0 ~ 23	Returns hours in 24 format. Same with hours.
hours12	number	0 ~ 12	Returns hours in 12 format.

UTC fields

Returns date and time in UTC(Coordinated Universal Time). The year, month, date and time may change depending on the timezone. The minutes, seconds and milliseconds is not affected.

The timezoneOffset value in UTC is same with timezoneOffset value in DateTime instance.

const date: DateTime = new DateTime();
const utcDate: DateTime = date.UTC;

With another type

Getter	Return Type	Description
valueOf()	number	Returns with Unix timestamp. Same with +new Date() and +new DateTime()
toDate()	Date	Returns Date type.
toISOString()	string	Returns with ISO string. Same with Date.toISOString().
toUTCString()	string	Returns with UTC string. Same with Date.toUTCString().
toJson()	object	Returns with DateTimeParam.

Setter - Each fields

Setter	Value Type	Description	Date Methods
year	number	Set year.	Date.setFullYear()
month	number	Set month.	Date.setMonth()
date	number	Set date.	Date.setDate()
hours	number	Set hours.	Date.setHours()
minutes	number	Set minutes.	Date.setMinutes()
seconds	number	Set seconds.	Date.setSeconds()
ms	number	Set milliseconds.	Date.setMilliseconds()

• Compared to the Date class, set- prefix has been omitted for better convenience, uses the setter method not the function execution form. For the same reason, getMilliseconds() methods is provided as ms.

• If you don't change the year, month setter value range is not 0 ~ 11, but 1 ~ 12.

set(): DateTime

Set date and time with DateTimeParam. Each field can be omitted.

const date : DateTime = new DateTime();

// set with 27-Oct-2020
date.set({
	year : 2020,
	month : 10,
	date : 27
});

• If you don't change the year, month setter value range is not 0 ~ 11, but 1 ~ 12.

add(param: DateTimeParam | Duration | DurationParam): DateTime

DateTime type is not supported.

with DateTimeParam

Set to a specific date and time. If a value less than 0 is used, the previous date and time are set.

const date : DateTime = new DateTime();

// set to after 11 months.
date.add({
	year : 1,
	month : -1
});

with Duration

Set to the date and time moved by the duration.

const date : DateTime = new DateTime();
const duration : Duration = new Duration({
	months : 11
});

// set to after 11 months.
date.add(duration);

with DurationParam

Set to the date and time moved by the duration. If a value less than 0 is used, the previous date and time are set.

const date : DateTime = new DateTime();

// set to after 11 months.
date.add({
	months : 11
});

startOf(unit): DateTime, endOf(unit): DateTime

Returns the start/end date and time based on the unit passed as a factor.

unit: year, quarter, month, week, date, hours, minutes, seconds, ms

const date: DateTime = new DateTime();

console.log(date.startOf('year').toISOString()); // 2020-01-01T00:00:00.000Z
console.log(date.endOf('year').toISOString()); // 2020-12-31T23:59:59.999Z

format(): string

Returns string with the format.

Token	Token string	Getter	Description	Value range
FormatToken.YearShort	YY	-	Converts to a 2-digit year.	00 ~ 20, ...
FormatToken.Year	YYYY	year	Converts to a 4-digit year.	1970 ~ 2020, ...
FormatToken.Quarter	Q	quarter	Converts to a quarter.	1 ~ 4
FormatToken.Month	M	month	Converts to a month.	1 ~ 12
FormatToken.MonthPadded	MM	-	Converts to a month with 2-digit.	01 ~ 12
FormatToken.MonthStringShort	MMM	-	Converts to a short name month.	Jan ~ Dec
FormatToken.MonthStringLong	MMMM	-	Converts to a long name month.	January ~ December
FormatToken.Week	W	weekOfYear	Converts to a number of the week in year.	1 ~ 53
FormatToken.WeekPadded	WW	-	Converts to a number of the week in year in 2-digit.	01 ~ 53
FormatToken.WeekPaddedWithPrefix	Www	-	Converts to a number of the week in year in 2-digit with prefix W.	W01 ~ W53
FormatToken.DayOfYear	DDD	dayOfYear	Converts to a numbef of the day in year.	1 ~ 365
FormatToken.DayOfYearPadded	DDDD	-	Converts to a number of the day in year in 3-digit.	001 ~ 365
FormatToken.DayOfMonth	D	dayOfMonth	Converts to a number of the day in month.	1 ~ 31
FormatToken.DayOfMonthPadded	DD	-	Converts to a number of the day in month in 2-digit.	01 ~ 31
FormatToken.DayOfWeek	d	day	Converts to a number of day.	0 ~ 6
FormatToken.DayOfWeekStringShort	dd	-	Converts to a short name day.	Su ~ Sa
FormatToken.DayOfWeekStringMiddle	ddd	-	Converts to a middle name day.	Sun ~ Sat
FormatToken.DayOfWeekStringLong	dddd	-	Converts to a long name day.	Sunday ~ Saturday
FormatToken.MeridiemLower	a	-	Converts to am/pm in lower case.	am, pm
FormatToken.MeridiemCapital	A	-	Converts to am/pm in upper case.	AM, PM
FormatToken.Hours24	H	hours, hours24	Converts to a hours in 24 format.	0 ~ 23
FormatToken.Hours24Padded	HH	-	Converts to a hours in 24 format in 2-digit.	00 ~ 23
FormatToken.Hours12	h	hours12	Converts to a hours in 12 format.	0 ~ 12
FormatToken.Hours12Padded	hh	-	Converts to a hours in 12 format in 2-digit.	00 ~ 12
FormatToken.Minutes	m	minutes	Converts to a minutes.	0 ~ 59
FormatToken.MinutesPadded	mm	-	Converts to a minutes in 2-digit.	00 ~ 59
FormatToken.Seconds	s	seconds	Converts to a seconds.	0 ~ 59
FormatToken.SecondsPadded	ss	-	Converts to a seconds in 2-digit.	00 ~ 59
FormatToken.MilliSeconds	S	ms	Converts to a milliseconds.	0 ~ 999
FormatToken.MilliSecondsPadded2	SS	-	Converts to a milliseconds in 2-digit.	00 ~ 99
FormatToken.MilliSecondsPadded3	SSS	-	Converts to a milliseconds in 3-digit.	000 ~ 999

Internationalization

You can set i18n in global context or each instance. If the setting in global and local is different, i18n is working with local setting.

If you set i18n value globally, new instances are set with that value.

console.log(DateTime.locale()); // 'en'

const date1: DateTime = new DateTime();
console.log(date1.locale()); // 'en'

DateTime.locale('ko-kr'); // set globally
console.log(DateTime.locale()); // 'ko-kr'

const date2: DateTime = new DateTime();
console.log(date2.locale()); // 'ko-kr'

const date3: DateTime = new DateTime();
date3.locale('en'); // set i18n locally
console.log(date3.locale()); // 'en'

Global DateTime.locale() and locale() methods in each instance without parameter returns current i18n value. If you want to set i18n value, pass language code to locale() methods.

Default value is en..

Warning

locale() methods uses ES6 import function. import function is working as Promise, so you should wait JavaScript 1 cycle after called locale() to load i18n file.

If the language code is invalid or the language file load fails after 1 cycle, the previous value will be restored.

DateTime.locale(): string

Set language in globally.

locale(): string

Set language in locally.

Language supports

Language code	Name
en	English
ko-kr	Korean (Korea)

Compare methods

All compare methods can be received DateTimeUnit. The accuracy of the calculation is based on this unit, and if the unit is omitted, it is calculated in milliseconds.

Methods	Return type	Description
diff()	number	Returns the difference value.
isEqual()	boolean	Returns true if the date is same with the parameter.
isBefore()	boolean	Returns true if the date is before than parameter.
isBeforeOrEqual()	boolean	Returns true if the date is before than or equal with parameter.
isAfter()	boolean	Returns true if the date is after than parameter.
isAfterOrEqual()	boolean	Returns true if the date is after than or equal with parameter.
isBetween()	boolean	Returns true if the date is between with 2 parameters.
isAfterOrEqual()	boolean	Returns true if the date is between with 2 parameters or same with one parameter.

const date1 : DateTime = new DateTime({
	year : 2020,
	month : 10,
	date : 20
});

const date2 : DateTime = new DateTime({
	year : 2020,
	month : 10,
	date : 27
});

console.log(date1.diff(date2, 'date')); // -7

console.log(date1.isEqual(date2, 'month')); // true

console.log(date1.isBefore(date2, 'date')); // true
console.log(date1.isBeforeOrEqual(date2, 'month')); // true

console.log(date1.isAfter(date2, 'date')); // false
console.log(date1.isBeforeOrEqual(date2, 'month')); // true

const date3 : DateTime = new DateTime({
  year : 2020,
  month : 10,
  date : 27
});

console.log(date2.isBetween(date1, date3, 'date')); // true
console.log(date2.isBetweenOrEqual(date1, date2, 'date')); // true

DateTimeParam, DateTimeParamEx

Represent date, time value. This object consists with this fields.

Field	Field Type	Value Range	Description
year	number	-	Represents year.
quarter	number	1 ~ 4	Represents quarter. (only for DateTimeParamEx)
month	number	1 ~ 12	Represents month.
week	number	1 ~ 42	Represents week number. (only for DateTimeParamEx)
date	number	1 ~ 31	Represents date.
hours	number	0 ~ 23	Represents hours.
minutes	number	0 ~ 59	Represents minutes.
seconds	number	0 ~ 59	Represents seconds.
ms	number	0 ~ 999	Represents mlliseconds.

• month field range is not 0 ~ 11. This field represent the real month value 1 ~ 12
• quarter, week are fields of DateTimeParamEx.

DateTimeUnit

Represents date and time unit.

Token	Field	Type	Description
DateTimeUnit.Year	year	number	Represents year.
DateTimeUnit.Quarter	quarter	number	Represents quarter.
DateTimeUnit.Month	month	number	Represents month.
DateTimeUnit.Week	week	number	Represents week number.
DateTimeUnit.Date	date	number	Represents date.
DateTimeUnit.Hours	hours	number	Represents hours.
DateTimeUnit.Minutes	minutes	number	Represents minutes.
DateTimeUnit.Seconds	seconds	number	Represents seconds.
DateTimeUnit.Ms	ms	number	Represents milliseconds.

Calendar

DateTime.getYearCalendar(): YearCalendar

Returns the year calendar for that year value of the instance. Time fields are set to 0.

Length of dates array field is same with the number of date in that year.

DateTime.getMonthCalendar(): MonthCalendar

Returns the month calendar for that month value of the instance. Time fields are set to 0.

Length of dates array field is same with the number of date in that month.

Duration

Represents duration.

Duration instance is created with new keyword.

const duration: Duration = new Duration();

If you pass parameter to constructor, you can create instance with specific duration. Parameter type supports for undefined, null, number, string, Duration, json type(DurationParam).

const newDurationByString : Duration = new Duration('PY2');

const newDurationByDuration : Duration = new Duration(new Duration());

const newDurationByDurationParam : Duration = new Duration({
  years : 2
});

Getter & Setter - Each fields

Token	Field	Type
DurationUnit.Years	years	number
DurationUnit.Months	months	number
DurationUnit.Dates	dates	number
DurationUnit.Hours	hours	number
DurationUnit.Minutes	minutes	number
DurationUnit.Seconds	seconds	number
DurationUnit.Ms	ms	number

const duration: Duration = new Duration(); // value : {}

duration.years = 2; // value : { years : 2 }
duration.ms = 1001; // value : { years : 2, seconds : 1, ms : 1} - with rebalancing

console.log(duration.seconds); // 1

add()

add (param : Duration | DurationParam) : Duration

If param is Duration or DurationParam, returns Duration.

add (param : DateTime | DateTimeParam) : DateTime

If param is DateTime or DateTimeParam, returns DateTime.

divide(count : number) : Duration[]

Divide total duration by count as Duration array.

const duration: Duration = { seconds: 1 };

console.log(duration.divide(4)); // 4 Duration instances with value of { ms : 250 }

DurationParam

Represent duration value. This object consists with this fields.

Field	Field Type	Value Range	Description
years	number	-	Represents years.
months	number	1 ~ 12	Represents months.
dates	number	1 ~ 31	Represents dates.
hours	number	0 ~ 23	Represents hours.
minutes	number	0 ~ 59	Represents minutes.
seconds	number	0 ~ 59	Represents seconds.
ms	number	0 ~ 999	Represents milliseconds.

DurationUnit

Represents duration unit.

Token	Field	Type	Description
DurationUnit.Years	years	number	Represents years.
DurationUnit.Quarters	quarters	number	Represents quarters.
DurationUnit.Months	months	number	Represents months.
DurationUnit.Weeks	weeks	number	Represents weeks.
DurationUnit.Dates	dates	number	Represents dates.
DurationUnit.Hours	hours	number	Represents hours.
DurationUnit.Minutes	minutes	number	Represents minutes.
DurationUnit.Seconds	seconds	number	Represents seconds.
DurationUnit.Ms	ms	number	Represents milliseconds.