How to convert a JSON string into JS object?

Question

I know the method to convert a JS object into a JSON string by using JSON.stringify(object) method. How can I encode a string object into JSON?

Answer 1

Same way:

var jsonEncodedString = JSON.stringify(string);

or are you asking for the revsere

var jsonString = JSON.stringify({hello:"world"}),
jsObject = JSON.parse(jsonString);

Answer 2

You can't convert a string into JSON. The outermost data type in JSON must be an object or an array.

See the specification :

JSON Grammar

A JSON text is a sequence of tokens. The set of tokens includes six structural characters, strings, numbers, and three literal names.

A JSON text is a serialized object or array.

You could wrap the string in an object or array and then serialise that:

JSON.stringify([myString]);
JSON.stringify({foo: myString});

Whatever processed it would have to know that after parsing the JSON it would have to extract the string from it though.

Answer 3

I think you're looking for the JSON.parse function .

var jsonString = '{"firstname":"Jesper","surname":"Aaberg","phone":["555-0100","555-0120"]}';
var contact = JSON.parse(jsonString);

var fullname = contact.surname + ", " + contact.firstname;
// The value of fullname is "Aaberg, Jesper"