JS: Bug converting string to Date

Question

I am converting a Data Object to JSON and back with JSON.stringify and JSON.parse.

This works great, on all devices but on Samsung Galaxy SII where for the line:

console.log(jsonObj.gebDat+"::"+new Date(jsonObj.gebDat));

I get the output:

1973-07-01T10:49:25.134Z::Invalid Date

I am implementing this exactly like at this answer, and it works for most devices, am I doing something wrong??

UPDATE

to clarify the question. I create a String calling

var stringToSave = JSON.stringify({gebDat: dataclass.gebDat, <here are some more variables>});

then I save it. Later, I load the string and parse it with

var jsonObj = JSON.parse(stringToSave);

then, I try to set my date again (calling a log just before that line) with

console.log(jsonObj.gebDat+"::"+new Date(jsonObj.gebDat));
this.gebDat = new Date(jsonObj.gebDat);

The log gives me the invalid date as shown above, and when I represent the Date it displays NaN.NaN.NaN instead of the expected 01.07.1973

Is your Galaxy SII on the same Android version than your other devices? — Maen
– Maen, Commented Jul 1, 2013 at 10:45
Do you handle dates in different timezones? Other wise try the constructor format new Date(year, month [, date [, hours[, minutes[, seconds[, ms]]]]]) — sabithpocker
– sabithpocker, Commented Jul 1, 2013 at 10:49
@Xotic750 jsonObj.gebDat is a string containing "1973-07-01T10:49:25.134Z" in this case. The string is generated using JSON.stringify over a variable of type Date — Daniel Klöck
– Daniel Klöck, Commented Jul 1, 2013 at 11:38

sabithpocker · Accepted Answer · 2013-07-01 12:02:29Z

1

1.Date string formats are implementation dependent. It is always recommended to use timestamps when you save dates.

var timestamp = Date.parse( new Date() );//1372675910000

Now you can use the saved timestamps to recreate the date later

var date = new Date(1372675910000);//Mon Jul 01 2013 16:21:50 GMT+0530 (India Standard Time)

2.For a simple transition from your current solution, in case you dont handle different timezones,

var dateString = jsonObj.getDat.substring(0,23);
var datePart = dateString.split('T')[0].split('-');
var timePart = dateString.split('T')[1].split(/[:.]/);
var DateOj = new Date(datePart[0], datePart[1], datePart[2], timePart[0], timePart[1], timePart[2]);

Let me clarify 1, with reference to your update.

var stringToSave = JSON.stringify({gebDat: Date.parse(dataclass.gebDat), <here are some more variables>});

var jsonObj = JSON.parse(stringToSave);

console.log('timestamp :' + jsonObj.gebDat);//1372680083000
console.log(new Date(jsonObj.gebDat));//Mon Jul 01 2013 17:31:23 GMT+0530 (India Standard Time)

edited Jul 1, 2013 at 12:02

answered Jul 1, 2013 at 11:03

sabithpocker

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5 Comments

Daniel Klöck Over a year ago

Date.parse() uses a string as parameter. I think using it with a Date parameter would not be a great idea.

sabithpocker Over a year ago

The suggession was to store jsonObj.getDat as timestamp. Then use that timestamp in date constructor.

Daniel Klöck Over a year ago

With JSON.stringify the method toJSON() is automatically called. It should work as good as a timestamp since it uses ISO-8601 standards.

Daniel Klöck Over a year ago

It works with the timestamp. I guess that's because of a bug in the contructor of Date in Android 2.3.3 that was corrected later...

sabithpocker Over a year ago

Yes, thay might have missed the rfc and iso recommendations.

Yoel Diamant · Accepted Answer · 2021-05-10 18:50:10Z

0

you need send string and you send callback.

try:

console.log(jsonObj.gebDat+"::"+new Date(jsonObj.gebDat()));

answered May 10, 2021 at 18:50

Yoel Diamant

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