ES6 - Data
Plik Date objectto typ danych wbudowany w język JavaScript. Obiekty Date są tworzone z nowymDate () jak pokazano w poniższej składni.
Po utworzeniu obiektu Date można na nim operować różnymi metodami. Większość metod pozwala po prostu pobrać i ustawić rok, miesiąc, dzień, godzinę, minutę, sekundę i milisekundę pól obiektu, używając czasu lokalnego lub czasu UTC (uniwersalnego lub GMT).
Standard ECMAScript wymaga, aby obiekt Date mógł przedstawiać dowolną datę i godzinę z dokładnością do milisekund w ciągu 100 milionów dni przed lub po 1 stycznia 1970 roku. Jest to zakres plus minus 273 785 lat, więc JavaScript może reprezentować datę i godzinę do roku 275755.
Możesz użyć dowolnej z następujących składni, aby utworzyć obiekt Date przy użyciu Date () constructor.
new Date( )
new Date(milliseconds)
new Date(datestring)
new Date(year,month,date[,hour,minute,second,millisecond ])Note - Parametry w nawiasach są zawsze opcjonalne.
Właściwości daty
Oto lista właściwości obiektu Date wraz z ich opisem.
| Sr.No | Właściwość i opis |
|---|---|
| 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 |