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19

I'm a Javascript newbie so bear with me. How can I serialise an object to JSON in Javascript? Is there a common external library I can use? I'm aware of jquery.getJSON(...) but this doesn't seem to quite do what I want, which is to simply get a string containing the JSON for an object in a piece of Javascript.

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3 Answers 3

up vote 163 down vote accepted

Are you looking for something like the JSON.stringify()? it is what i use for my WCF calls.

http://www.json.org/js.html

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Using JSON.stringify() with javascript objects containing arrays have a little thing to it. Please check my question: stackoverflow.com/questions/25423883/… – Reek Aug 21 '14 at 12:33
up vote 33 down vote

Download https://github.com/douglascrockford/JSON-js/blob/master/json2.js, include it and do

var json_data = JSON.stringify(obj);
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17  
var json_data = JSON.stringify(obj); – Christian Oct 1 '10 at 18:38
    
Should I really need to include "json2.js"? It seems to works without it. – Pavel Alexeev Mar 31 '12 at 8:28
24  
@PavelAlexeev No, you don't neet to include json2.js anymore, unless you are targetting very old browsers: modern browsers include a native implementation of the JSON object. The good thing about json2.js is that it will only kick in if no native object is found. See [stackoverflow.com/questions/891299/… for a detailed breakdown of browser support. – herenvardo May 10 '12 at 8:14
up vote 3 down vote

Just to keep it backward compatible I load Crockfords JSON-library from cloudflare CDN if no native JSON support is given (for simplicity using jQuery):

function winHasJSON(){
  json_data = JSON.stringify(obj);
  // ... (do stuff with json_data)
}
if(typeof JSON === 'object' && typeof JSON.stringify === 'function'){
  winHasJSON();
} else {
  $.getScript('//cdnjs.cloudflare.com/ajax/libs/json2/20121008/json2.min.js', winHasJSON)
}
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