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up vote 204 down vote favorite
36

If I defined an object in JS with:

var j={"name":"binchen"};

How can I convert the object to JSON? The output string should be:

'{"name":"binchen"}'
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2  
possible duplicate of JS object to JSON string? –  outis Dec 26 '11 at 10:19

3 Answers 3

up vote 359 down vote accepted

Modern browsers (IE8, FF3, Chrome etc.) have native JSON support built in (Same API as with JSON2).

So as long you're not dealing with IE6/7 you can do it just as easily as that:

var j={"name":"binchen"};
JSON.stringify(j); // '{"name":"binchen"}'

But to add support for the oldie's, you should also include the json2 script

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download this script in order for JSON.stringify(j); to work –  abi1964 Jul 21 '11 at 9:55
up vote 18 down vote

With json2.js's JSON.stringify().

   JSON.stringify(value, replacer, space)
        value       any JavaScript value, usually an object or array.

       replacer    an optional parameter that determines how object
                    values are stringified for objects. It can be a
                    function or an array of strings.

       space       an optional parameter that specifies the indentation
                    of nested structures. If it is omitted, the text will
                    be packed without extra whitespace. If it is a number,
                    it will specify the number of spaces to indent at each
                    level. If it is a string (such as '\t' or ' '),
                    it contains the characters used to indent at each level.

       This method produces a JSON text from a JavaScript value.
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up vote 6 down vote

Check out updated/better way:

Update May 17, 2008: Small sanitizer added to the toObject-method. Now toObject() will not eval() the string if it finds any malicious code in it.For even more security: Don't set the includeFunctions flag to true.

Douglas Crockford, father of the JSON concept, wrote one of the first stringifiers for JavaScript. Later Steve Yen at Trim Path wrote a nice improved version which I have used for some time. It's my changes to Steve's version that I'd like to share with you. Basically they stemmed from my wish to make the stringifier:

• handle and restore cyclical references  
• include the JavaScript code for functions/methods (as an option)  
• exclude object members from Object.prototype if needed.
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Thanks that worked very well –  Wahid Bitar Jun 9 '13 at 16:51

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