CODEWITHSUNDEEP
javascriptjson
maxaposteriori
maxaposteriori

Reputation: 7337

Serializing an object to JSON

How can I serialize an object to JSON in JavaScript?

Upvotes: 213

Views: 262338

Answers (4)

AvL
AvL

Reputation: 3093

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(Object.prototype.hasOwnProperty.call(window, "JSON") && typeof JSON.stringify === 'function'){
  winHasJSON();
} else {
  $.getScript('//cdnjs.cloudflare.com/ajax/libs/json2/20121008/json2.min.js', winHasJSON)
}

Upvotes: 4

Mike_G
Mike_G

Reputation: 16502

You’re looking for JSON.stringify.

Examples:

const object = {
    hello: "world",
    "some array": [ 42, 69, 420, 1337, null, true ]
  },
  primitive = false;

console.log(JSON.stringify(object)); // "{\"hello\":\"world\",\"some array\":[42,69,420,1337,null,true]}"
console.log(JSON.stringify(primitive)); // "false"

Upvotes: 298

pasta64
pasta64

Reputation: 462

How to work with JSON in Javascript

Having to work with JSON is a common situation in web development, this is why Javascript provides the JSON object with its static methods.

Parsing from string to object

To parse a JSON string into a Javascript object we can use JSON.parse()

let obj = JSON.parse('{"x": 325, "y": 896, "speed": 16.5}')

Result:

obj = {
  x: 325,
  y: 896,
  speed: 16.5
}

Parsing from object to string

Converting a Javascript object to a string it's as easy as the inverse operation

let str = JSON.stringify({x: 325, y: 896, speed: 16.5})

Result:

str = '{"x": 325, "y": 896, "speed": 16.5}'

Upvotes: 0

Johannes Weiss
Johannes Weiss

Reputation: 54031

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

var json_data = JSON.stringify(obj);

Upvotes: 51

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