How to convert JSON object to JavaScript object

Question

I am trying to convert JSON object data from http://api.fixer.io/latest?base=USD which contains to JavaScript object `

{
 "base": "USD",
 "date": "2016-12-14",
 "rates": {
 "AUD": 1.3319,
 "BGN": 1.8375,
 "BRL": 3.311,
 "CAD": 1.3116,
 "CHF": 1.0097,
 "CNY": 6.9052,
 "CZK": 25.388,
 "DKK": 6.986,
 "GBP": 0.78883,
 "HKD": 7.7566,
 "HRK": 7.0843,
 "HUF": 295.84,
 "IDR": 13288,
 "ILS": 3.8097,
 "INR": 67.479,
 "JPY": 114.98,
 "KRW": 1166,
 "MXN": 20.262,
 "MYR": 4.4441,
 "NOK": 8.4764,
 "NZD": 1.3849,
 "PHP": 49.716,
 "PLN": 4.1716,
 "RON": 4.2421,
 "RUB": 61.197,
 "SEK": 9.1651,
 "SGD": 1.424,
 "THB": 35.59,
 "TRY": 3.4879,
 "ZAR": 13.67,
 "EUR": 0.9395
 }
}

What i have tried so far in console

var text = $.getJSON('http://api.fixer.io/latest?base=GBP')
var obj = JSON.parse(text);

which gives me an error.

var text = $.getJSON('http://api.fixer.io/latest?base=GBP')
var obj = JSON.stringify(text, 0, 2)

which turn everything to string which is not what i wanted.

I am trying to achieve(after manage to convert them into object)

obj.rates.AUD

Which will return the value 1.3319 which is from the JSON object data. Thanks

• Eric: "which gives me an error." What's the error?
• wyldstallyns: I ran into an http/https error at first, you may want to drop the protocol.
• Felix Kling: Please read the documentation: api.jquery.com/jquery.getjson .

Answer 1

jQuery's getJSON parses the JSON for you, but the request is asynchronous, so it doesn't return the response text directly; instead it returns a jqXHR object.

This should work for you:

$.getJSON('http://api.fixer.io/latest?base=GBP').then( function ( obj ) {
 console.log( obj );
} );

Answer 2

If you just look at the response of that request, you can see that the JSON comes inside of the responseText property. Just do:

var obj = JSON.parse(text.responseText);

Additionally, getJson is an asynchronous call, so you need to do this in the callback otherwise the response may not exist yet:

var obj;
var text = $.getJSON('http://api.fixer.io/latest?base=GBP', function() {
 obj = JSON.parse(text.responseText);
});

Edit: As commenter pointed out, you can also just get the JSON straight from the responseJSON property:

var obj;
var text = $.getJSON('http://api.fixer.io/latest?base=GBP', function(){
 obj = text.responseJSON;
});

• wyldstallyns: In Chrome it appears to be already parsed in response.responseJSON
• Pabs123: You can definitely get it from responseJSON as well!
• Andy: The JSON response is also passed as an argument to the callback function as per Paulpro's answer.

Answer 3

Don't use JSON.parse() or JSON.stringify() . As demonstrated in jquery docs $.getJSON(url , callback) takes a callback . Also $.getJSON() uses $.parseJSON() behind the scenes so an object will be passed into the callback by default .

Your Problem..

var text = $.getJSON('http://api.fixer.io/latest?base=GBP') <-- returns nothing

The Solution .. add a callback function

var text = $.getJSON('http://api.fixer.io/latest?base=GBP' , function(response){
console.log(response.rates.AUD);
})

docs : http://api.jquery.com/jquery.getjson/

Hope this helps.