ES6-日付

ザ・ Date objectJavaScript言語に組み込まれているデータ型です。新しい日付オブジェクトが作成されますDate () 次の構文に示すように。

Dateオブジェクトが作成されると、いくつかのメソッドを使用してオブジェクトを操作できます。ほとんどのメソッドでは、現地時間またはUTC（ユニバーサル、またはGMT）時間を使用して、オブジェクトの年、月、日、時間、分、秒、およびミリ秒のフィールドを取得および設定できます。

ECMAScript標準では、Dateオブジェクトが1970年1月1日前後の1億日以内に、任意の日付と時刻をミリ秒の精度で表すことができる必要があります。これはプラスマイナス273、785年の範囲であるため、JavaScriptは275755年までの日付と時刻を表すことができます。

次の構文のいずれかを使用して、を使用してDateオブジェクトを作成できます。 Date () constructor。

new Date( ) 
new Date(milliseconds) 
new Date(datestring) 
new Date(year,month,date[,hour,minute,second,millisecond ])

Note −括弧内のパラメーターは常にオプションです。

日付プロパティ

これは、Dateオブジェクトのプロパティとその説明のリストです。

シニア番号	プロパティと説明
1	constructor Specifies the function that creates an object's prototype
2	prototype The prototype property allows you to add properties and methods to an object

Date Methods

Following is a list of different date methods along with the description.

Sr.No	Method & Description
1	Date() Returns today's date and time
2	getDate() Returns the day of the month for the specified date according to the local time
3	getDay() Returns the day of the week for the specified date according to the local time
4	getFullYear() Returns the year of the specified date according to the local time
5	getHours() Returns the hour in the specified date according to the local time
6	getMilliseconds() Returns the milliseconds in the specified date according to the local time
7	getMinutes() Returns the minutes in the specified date according to the local time
8	getMonth() Returns the month in the specified date according to the local time
9	getSeconds() Returns the seconds in the specified date according to the local time
10	getTime() Returns the numeric value of the specified date as the number of milliseconds since January 1, 1970, 00:00:00 UTC
11	getTimezoneOffset() Returns the time-zone offset in minutes for the current locale
12	getUTCDate() Returns the day (date) of the month in the specified date according to the universal time
13	getUTCDay() Returns the day of the week in the specified date according to the universal time
14	getUTCFullYear() Returns the year in the specified date according to the universal time
15	getutcHours() Returns the hours in the specified date according to the universal time
16	getUTCMilliseconds() Returns the milliseconds in the specified date according to the universal time
17	getUTCMinutes() Returns the minutes in the specified date according to the universal time
18	getUTCMonth() Returns the month in the specified date according to the universal time
19	getUTCSeconds() Returns the seconds in the specified date according to the universal time
20	setDate() Sets the day of the month for a specified date according to the local time
21	setFullYear() Sets the full year for a specified date according to the local time
22	setHours() Sets the hours for a specified date according to the local time
23	setMilliseconds() Sets the milliseconds for a specified date according to the local time
24	setMinutes() Sets the minutes for a specified date according to the local time
25	setMonth() Sets the month for a specified date according to the local time
26	setSeconds() Sets the seconds for a specified date according to the local time
27	setTime() Sets the Date object to the time represented by a number of milliseconds since January 1, 1970, 00:00:00 UTC
28	setUTCDate() Sets the Date object to the time represented by a number of milliseconds since January 1, 1970, 00:00:00 UTC
29	setUTCFullYear() Sets the full year for a specified date according to the universal time
30	setUTCHours() Sets the hour for a specified date according to the universal time
31	setUTCMilliseconds() Sets the milliseconds for a specified date according to the universal time
32	setUTCMinutes() Sets the minutes for a specified date according to the universal time
33	setUTCMonth() Sets the month for a specified date according to the universal time
34	setUTCSeconds() Sets the seconds for a specified date according to the universal time
35	todatestring() Returns the "date" portion of the Date as a human-readable string
36	toLocaleDateString() Returns the "date" portion of the Date as a string, using the current locale's conventions
37	toLocaleString() Converts a date to a string, using the current locale's conventions
38	toLocaleTimeString() Returns the "time" portion of the Date as a string, using the current locale's conventions
39	toString() Returns a string representing the specified Date object
40	toTimeString() Returns the "time" portion of the Date as a human-readable string
41	toUTCString() Converts a date to a string, using the universal time convention
42	valueOf() Returns the primitive value of a Date object