JS time function Daquan detailed explanation ----- AHAO blog

date 、 Time object
date 、 Time object is used to save date and time , Save time in a specific time period , from 1970 Year forward or backward 285616 year ,UTC It's Greenwich mean time , Also known as universal time .
Instantiate Date object ：var date = new Date ( );
Timestamp of one year ：var yearTimeStamp = 3652460601000;

Set date time var date = new Date ( 2018,1,1 )
var date = new Date(“1/1/2018 11:30:30”);
1、 Component method

1、 Get full year getFullYear ( );
2、 Set full year setFullYear ( );
3、 Get month getMonth ( ); Value range ：0-11
4、 Set month setMonth ( );
5、 Get date getDate ( ); Value range ：1-31
6、 Setting date setDate ( );
7、 Get week getDay ( ); Value range ：0-6
8、 For hours getHours ( ); Value range ：0-23
9、 Set hours setHours ( );
10、 Get minutes getMinutes ( ); Value range ：0-59
11、 Set minutes setMinutes ( );
12、 Get seconds getSeconds ( ); Value range ：0-59
13、 Set seconds setSeconds ( );
14、 Get milliseconds getMillionSeconds ( ); Value range ：0-999
15、 Set milliseconds setMillionSeconds ( );
Component methods have a corresponding UTC.

function ： Get the day of the week on the first day of the specified year
function getweek（year,month）{
return new Date（year,month-1）.getDay;
}console.log（getweek（2017,10））;

2、 Time timer
1、 Set time timer setInterval ( function ( ){ }, The time interval （ In milliseconds ） );

2、 Clear time timer clearInterval ( Timer name );