ES6 - Datum
Das Date objectist ein Datentyp, der in die JavaScript-Sprache integriert ist. Datumsobjekte werden mit dem neuen erstelltDate () wie in der folgenden Syntax gezeigt.
Sobald ein Datumsobjekt erstellt wurde, können Sie es mit einer Reihe von Methoden bearbeiten. Bei den meisten Methoden können Sie einfach die Felder Jahr, Monat, Tag, Stunde, Minute, Sekunde und Millisekunde des Objekts mithilfe der Ortszeit oder der UTC-Zeit (Universal oder GMT) abrufen und einstellen.
Der ECMAScript-Standard verlangt, dass das Date-Objekt jedes Datum und jede Uhrzeit mit einer Genauigkeit von Millisekunden innerhalb von 100 Millionen Tagen vor oder nach dem 1.1.1970 darstellen kann. Dies ist ein Bereich von plus oder minus 273.785 Jahren, sodass JavaScript Datum und Uhrzeit bis zum Jahr 275755 darstellen kann.
Sie können eine der folgenden Syntax verwenden, um ein Datumsobjekt mit zu erstellen Date () constructor.
new Date( )
new Date(milliseconds)
new Date(datestring)
new Date(year,month,date[,hour,minute,second,millisecond ])Note - Parameter in Klammern sind immer optional.
Datumseigenschaften
Hier ist eine Liste der Eigenschaften des Date-Objekts zusammen mit ihrer Beschreibung.
| Sr.Nr. | Objektbeschreibung |
|---|---|
| 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 |