javascript - Store `new Date ()` in JSON object - Stack Overflow

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I have the following field validator object:

{ type:'date', 'min':new Date() }

I was hoping that I could store new Date() as an expression in JSON and it would be executed when it's parsed

I have the following field validator object:

{ type:'date', 'min':new Date() }

I was hoping that I could store new Date() as an expression in JSON and it would be executed when it's parsed

• javascript
• json

Share Follow edited Feb 5, 2016 at 13:54 stackoverfloweth asked Feb 5, 2016 at 13:43 stackoverflowethstackoverfloweth 6,91755 gold badges4343 silver badges7575 bronze badges 4

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4 Answers 4

Sorted by: Reset to default 3

save the timestamp:

{ type:'date', 'min':(new Date()).getTime() }

then you read it back:

var result = JSON.parse('{ "type":"date", "min":1234567 }');
result.date = new Date(result.min);

Note: the server you use to serialize it and the server you use to deserialize it has to run in the same timezone

You can't store the plete Date object in a JSON string. But you can try to store a text representing him :

As a string :

{ type:'date', 'min':(new Date()).toString() }

As a timestamp :

{ type:'date', 'min':(new Date()).getTime() }

As an ISO string :

{ type:'date', 'min':(new Date()).toJSON() }

JSON does not support the Date datatype (it only supports string number, object, array, true, false, and null). You need to convert it to a string instead.

For example, ISO time:

var json = JSON.stringify( { type:'date', 'min':new Date().toISOString() } );
document.body.appendChild(document.createTextNode(json));

The date object, actually has a toJSON method, which you might find useful. However I suggest using getTime as it returns a timestamp, which is usually more flexible.

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