What are the JavaScript date setting methods?
This article mainly introduces what the JavaScript date setting method has, which has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.
JavaScript date setting method, full date operation
The setting method is used to set a portion of the date. Here are the most commonly used methods (sorted alphabetically):
Method description
SetDate () sets the day with a numeric value (1-31)
SetFullYear () setting year (optional month and day)
SetHours () setting hours (0-23)
SetMilliseconds () setting milliseconds (0-999)
SetMinutes () setting score (0-59)
SetMonth () setting month (0-11)
SetSeconds () setting seconds (0-59)
SetTime () setting time (milliseconds since January 1, 1970)
SetFullYear () method
The setFullYear () method sets the year of the date object. This example is set to 2020:
Example
Var d = new Date ()
D.setFullYear (2020)
Document.getElementById ("demo"). InnerHTML = d
The setFullYear () method can optionally set the month and day:
Example
Var d = new Date ()
D.setFullYear (2020, 11, 3)
Document.getElementById ("demo"). InnerHTML = d
SetMonth () method
The setMonth () method sets the month of the date object (0-11):
Example
Var d = new Date ()
D.setMonth (11)
Document.getElementById ("demo"). InnerHTML = d
SetDate () method
The setDate () method sets the date object's date (1-31):
Example
Var d = new Date ()
D.setDate (15)
Document.getElementById ("demo"). InnerHTML = d
The setDate () method can also be used to add days to a date:
Example
Var d = new Date ()
D.setDate (d.getDate () + 50)
Document.getElementById ("demo"). InnerHTML = d
If you add days and switch months or years, the change is handled automatically by the Date object.
SetHours () method
The setHours () method sets the hour of the date object (0-23):
Example
Var d = new Date ()
D.setHours (22)
Document.getElementById ("demo"). InnerHTML = d
SetMinutes () method
The setMinutes () method sets the minutes of the date object (0-59):
Example
Var d = new Date ()
D.setMinutes (30)
Document.getElementById ("demo"). InnerHTML = d
SetSeconds () method
The setSeconds () method sets the number of seconds for the date object (0-59):
Example
Var d = new Date ()
D.setSeconds (30)
Document.getElementById ("demo"). InnerHTML = d
Compare date
Dates can be easily compared.
The following example compares today with January 16, 2049:
Example
Var today, someday, text
Today = new Date ()
Someday = new Date ()
Someday.setFullYear (2049, 0,16)
If (someday > today) {
Text = "Today before January 16, 2049"
} else {
Text = "Today is after January 16, 2049"
}
Document.getElementById ("demo"). InnerHTML = text
JavaScript counts months from 0 to 11. January is 0. December is November.
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