Convert from String to DateTime in Node Js

Question

I have a variable called workFrom that has time(hh:mm) as String at the FrontEnd(Angular JS). I would like to convert this to Date format before posting the data on to MongoDB with default date as 01/01/1970 and the time from whatever has been posted from workFrom. How do I do it?

Eg : workFrom : 11:40 should be converted to 01/01/1970 11:40 (according to the standard format of date used in MongoDB).

Thanks in advance

I am a newbie to Node JS, So could you be more elaborate on how to convert @abhishekkannojia — Vignesh
– Vignesh, Commented Nov 8, 2016 at 7:16
You don't need a library: '11:40'.split(':').reduce((h,m)=> new Date(h*3.6e6 + m*6e4).toISOString()). — RobG
– RobG, Commented Nov 8, 2016 at 7:20

Khalid Taha · Accepted Answer · 2019-11-14 13:48:28Z

2

Solution in vanila JS.

var input = '11:40';
var parts = input.split(':');
var minutes = parts[0]*60 +parts[1];
var inputDate = new Date(minutes * 60 * 1000);
console.log(inputDate);

Or use moment as wrote abhishekkannojia.

edited Nov 14, 2019 at 13:48

Khalid Taha

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answered Nov 8, 2016 at 6:58

galkin

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3 Comments

RobG Over a year ago

I think you need parts[0]*60 + +parts[1] but otherwise, great.

galkin Over a year ago

First operand parts[0]*60 is number, then second operand parts[1] will be converted to number

RobG Over a year ago

No, it won't. While parts[1]*60 returns a number, parts[0] is a string, so it will be concatenated, not added. And you have the indices reversed, you want parts[0]*60, etc. Those two errors mean the value of minutes is "240011" instead of 700 and the result is "1970-06-16T16:11:00.000Z" instead of "1970-01-01T11:40:00Z". ;-)

Siraj Hussain · Accepted Answer · 2016-11-08 07:30:13Z

1

One simple approach can be like this:

workFrom = "11:40";
time = new Date("01/01/1970" + " " + workFrom);
console.log(time.getDate() +'/'+ time.getMonth() +'/'+ ime.getFullYear()+ ' '+ time.getHours() + ':' + time.getMinutes());

answered Nov 8, 2016 at 7:30

Siraj Hussain

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Comments

C'estLaVie · Accepted Answer · 2017-11-12 17:01:05Z

1

With using moment (Which I recomend whenever you are dealing with date/time related problems):

let workFrom = "11:40";
let workFromMoment = moment(workFrom,'hh:mm')  
let adjustedMoment = moment([1970,0,1]).hour(workFromMoment.hour()).minute(workFromMoment.minute())
let dateString = adjustedMoment.format('D/M/Y hh:mm')`
console.log(dateString);

This snippet, in turn, will produce the output of "1/1/1970 11:40"

answered Nov 12, 2017 at 17:01

C'estLaVie

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Comments

Simran · Accepted Answer · 2016-11-08 07:20:10Z

0

var d = new Date("01/01/1970 11:40:0:0");

you can do it:

 date="01/01/1970";
 workFrom="11:40";
 d = new Date(date +" "+workFrom);

edited Nov 8, 2016 at 7:20

answered Nov 8, 2016 at 7:02

Simran

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1 Comment

RobG Over a year ago

Parsing strings with the Date constructor (or Date.parse, they are equivalent for parsing) is strongly discouraged.

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