A daily summary of javascript Learning (Date objects)
- 2020-10-23 20:53:22
- OfStack
1, Date. now ()
//Date.now() is in ECMAScript 5
//Prior to that, use +new Date()
// Get current time
var now = (typeof Date.now == "function" ? Date.now() : +new Date());
alert("Right now: " + now);
2. Date.parse() method
var now = new Date();
alert(now);
var someDate = new Date(Date.parse("May 25, 2004"));
//parse() Method resolvable 1 Date time string, and return 1970/1/1 The number of milliseconds between midnight and the time of the date.
alert(someDate);
3. Date UTC() and toUTCString() methods
//UTC() Method returns based on universal time 1970 years 1 month 1 day The number of milliseconds to the specified date.
//Date.UTC(year,month,day,hours,minutes,seconds,ms)
/*
year A necessity. Year denoting 4 Digit number.
month A necessity. Represents an integer of the month, between 0 ~ 11 .
day A necessity. An integer representing a date, between 1 ~ 31 .
hours Optional. An integer representing hours, between 0 ~ 23 .
minutes Optional. An integer representing minutes, between 0 ~ 59 .
seconds Optional. An integer representing seconds, between 0 ~ 59 .
ms Optional. An integer representing milliseconds, between 0 ~ 999 .
Date.UTC() is 1 A static method, because constructors are required Date() To call it instead of going through one Date Object invocation.
Date.UTC() Method to specify a date and time, both of which are UTC Time, in GMT Time zone. The specified UTC The time will be converted to milliseconds,
Construct the function like this Date() And methods Date.setTime() You can use it.
*/
//toUTCString() The method can be based on universal time (UTC) the Date Converts the object to a string and returns the result.
//January 1, 2000 at midnight
var y2k = new Date(Date.UTC(2000, 0));
alert(y2k.toUTCString());
//May 5, 2005 at 5:55:55 PM GMT
var allFives = new Date(Date.UTC(2005, 4, 5, 17, 55, 55));
alert(allFives.toUTCString());
The above is the summary of today's javascript study, which will continue to be updated every day. I hope you will continue to pay attention to it.