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javascriptjson
jcvegan
jcvegan

Reputation: 3170

Parse object to JSON

I have some web services that receive JSON data send by jquery method. But I need to edit the object before send this data. Is there any way to parse a JSON object to a simple object in javascript, modify it and then parse it again to JSON. or maybe update this JSON object without parse it?

Upvotes: 3

Views: 2791

Answers (5)

Matt Ball
Matt Ball

Reputation: 359786

To go from a JSON string to a JavaScript object: JSON.parse, or $.parseJSON if you're using jQuery and concerned about compatibility with older browsers.

To go from a JavaScript object to a JSON string: JSON.stringify.

If I've already do this var myData = JSON.stringify({ oJson:{data1 :1}}); and then I want to update that information setting data1 = 2, what is the best way to do this?

var myData = JSON.stringify({ oJson:{data1 :1}});
// later...
parsedData = JSON.parse(myData);
parsedData.oJson.data1 = 2;
myData = JSON.stringify(parsedData);

Even better though, if you save a reference to the object before stringifying it, you don't have to parse the JSON at all:

var obj = { oJson:{data1 :1}};
var myData = JSON.stringify(obj);
// later...
obj.oJson.data1 = 2;
myData = JSON.stringify(obj);

Upvotes: 6

Luqman
Luqman

Reputation: 1576

You could do something like this to get a javascript object:

var jsObject = JSON.parse(jsonString);

Then you could modify jsObject and turn it back into a JSON string with JSON.stringify.

This page has more information on it.

Upvotes: 0

Andreas Köberle
Andreas Köberle

Reputation: 110892

As JSON is an JavaScript object you can simply manipulate it with JavaScript.

Upvotes: 0

musefan
musefan

Reputation: 48415

I think something like the following should work...

//Convert your JSON object into a JavaScript object
var myObject = JSON.parse(json);

//You can then manipulate the JavaScript object like any other
myObject.SomeValue = "new";

//Then you can convert back to a JSON formatted string
json = JSON.stringify(myObject);

Upvotes: 0

Tomasz Nurkiewicz
Tomasz Nurkiewicz

Reputation: 340713

var parsed = JSON.parse('{"a": 1}');
parsed.b = 2;
var string = JSON.stringify(parsed);
//string is: '{"a":1,"b":2}'

Upvotes: 3

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