Question

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?

Answer 1

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.

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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);