How to get yesterday date in node.js backend?

问题:

I am using date-format package in node back end and I can get today date using

var today = dateFormat(new Date());

In the same or some other way I want yesterday date. Still I did't get any proper method. For the time being I am calculating yesterday date manually with lot of code. Is there any other method other then writing manually ?

回答1:

Try this:

var d = new Date(); // Today!
d.setDate(d.getDate() - 1); // Yesterday!

回答2:

I would take a look at moment.js if you are interested in doing calculations with dates, there are many issues you can run into trying to do it manually or even with the built in Date objects in JavaScript/node.js such as leap years and daylight savings time issues.

http://momentjs.com/

For example:

var moment = require('moment');
var yesterday = moment().subtract(1, 'days');
console.log(yesterday.format());

回答3:

Extract yesterday's date from today

//optimized way 
        var yesterday = new Date();
        yesterday.setDate(yesterday.getDate()-1);
        console.log(yesterday) // log yesterday's date 


//in-detail way 
        var today = new Date();
        var yesterday = new Date();
        yesterday.setDate(today.getDate()-1);
        console.log(yesterday) // log yesterday's date

回答4:

you can also change Hour,Minute,seconds and milliseconds attributes of time object like this.

var date = new Date();
    date.setDate(date.getDate()-1);
    date.setHours(hour);
    date.setMinutes(minute);
    date.setSeconds(seconds);
    date.setMilliseconds(milliseconds);

回答5:

To get the string in a format familiar to people

// Date String returned in format yyyy-mm-dd
function getYesterdayString(){
    var date = new Date();
    date.setDate(date.getDate() - 1);
    var day = ("0" + date.getDate()).slice(-2);
    var month = ("0" + (date.getMonth() + 1)).slice(-2); // fix 0 index
    return (date.getYear() + 1900) + '-' + month + '-' + day;
}

回答6:

Date class will give the current system date and current_ date - 1 will give the yesterday date.

Eg:

var d = new Date(); // Today!
d.setDate(d.getDate() - 1); // Yesterday!

回答7:

Try Library called node-datetime

var datetime = require('node-datetime');
var dt = datetime.create();
// 7 day in the past
dt.offsetInDays(-1);
var formatted = dt.format('Y-m-d H:M:S');
console.log(formatted)