Detailed explanation of new date() parameters in js

This article mainly shares with you the detailed explanation of the new date() parameter in js. I hope it can help you. Commonly used parameter initialization methods for JS Date objects:

1. Initialize date objects with integers
var date1 = new Date(2017,06,06); console.log(date1 ); // Thu Jul 06 2017 00:00:00 GMT+0800 (China Standard Time)
var date1 = new Date(2017,1,1); console.log(date1); // Wed Feb 01 2017 00:00:00 GMT+0800 (China Standard Time)
var date1 = new Date(2017,01-2,01); console.log(date1); // Thu Dec 01 2016 00:00:00 GMT +0800 (China Standard Time)
var date1 =new Date(2017,06,06,06,06,06); console.log(date1); // Thu Jul 06 2017 06:06:06 GMT+0800 (China Standard Time)
Description: new Date(year, month, date, hrs, min, sec) Create a date object according to the given parameters

2. Use characters String initialization date object
var date2 = new Date(“2017/06/06”); console.log(date2); // Tue Jun 06 2017 00:00:00 GMT+0800 (China Standard Time)
var date2 = new Date(“2017-08-08”); console.log(date2); // Tue Aug 08 2017 08:00:00 GMT+0800 (China Standard Time)
var date2 = new Date ("2017-9-9"); console.log(date2); // Sat Sep 09 2017 00:00:00 GMT+0800 (China Standard Time)
Description: If the string mode does not support the dash mode, perform string replacement:
var strTime=”2011-04-16”;
var date2= new Date(Date.parse(strTime.replace (/-/g, “/”))); // /-/g is a regular expression (RegExp) object, indicating global replacement - to /.

3. Initialize the date object with millisecond timestamp
var timestamp=new Date().getTime(); console.log( new Date(timestamp) ); //Tue Jun 06 2017 11:06 :59 GMT+0800 (China Standard Time)
var date3 = new Date( timestamp - 1 * 60 * 60 * 1000); console.log(date3); // Tue Jun 06 2017 10:06:59 GMT+ 0800 (China Standard Time)
Explanation: The timestamp refers to 00:00:00 Greenwich Time on January 1, 1970 (08:00 on January 1, 1970 Beijing time 00 seconds) to now. A timestamp uniquely identifies a moment in time.

Call new Date() separately in js, for example document.write(new Date());

The displayed result is: Mar 31 10: 10:43 UTC+0800 2012 The time in this format

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cannot be obtained in the safari browser when tested. Short-term patterns such as new Date(“2017-08-08”) are not supported. Just change it to a slash.

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