How read the json in javascript?

Question

Can you tell me how to read the json in javascript?

I have a json string as bellow

 {"person":{"First name":"Dharmalingm","Last name":"Arumugam","Address":{"door number":"123","street":"sample street","city":"sample_city"},"phone number":{"mobile":"0123","landline":"01234","skype":"01235"}}}

I want to read the skype phone number

• Marc B: Don't try to read the string. JSON IS javascript, it can be trivially converted into a native javascript object/array: json.org/js.html
• Steve: Can you be a little more specific? Do you have the above JSON as a string value (i.e. "{"person":{...}}") or as an object (i.e. {"person":{...}})?
• Matthew Flaschen: Is this the response to an AJAX call, or is it available when the initial page is rendered?

Answer 1

If you are starting out with a JSON string, start with 1. If you already have a JS object, then skip to 2.

1. Parse the string using JSON.parse() to convert JSON string to a JS object. To support a browser that does not have the native JSON, you can use Crockford's JSON2 library to implement it.

   var jsondata = JSON.parse('{"person":{"First name":"Dharmalingm","Last name":"Arumugam","Address":{"door number":"123","street":"sample street","city":"sample_city"},"phone number":{"mobile":"0123","landline":"01234","skype":"01235"}}}');
   

2. Retrieve the value like you normally would from a JS object

   var skype = jsondata.person['phone number'].skype;
   

Here's the full code and a sample:

var jsondata = JSON.parse('{"person":{"First name":"Dharmalingm","Last name":"Arumugam","Address":{"door number":"123","street":"sample street","city":"sample_city"},"phone number":{"mobile":"0123","landline":"01234","skype":"01235"}}}');
//normally, the dot-notation is used
//but since "phone number" is not a valid key when using dot-notation
//the bracket notation is used
var skype = jsondata.person['phone number'].skype;

Answer 2

This should get you on your way.

var o = {"person":{"First name":"Dharmalingm","Last name":"Arumugam","Address":{"door number":"123","street":"sample street","city":"sample_city"},"phone number":{"mobile":"0123","landline":"01234","skype":"01235"}}}
o["person"]["phone number"]["skype"];
/* or */
o.person["phone number"]["skype"];

• drublic: If you don't have the "string" available in JavaScript as in this example (for instance if you get it from an external source) you should try @Joseph the Dreamer's answer.

Answer 3

First it needs to be parsed out to a native javascript object, in modern browsers this can be done via JSON.parse(json string here);. Now to specifically get to the skype number you have the object you just parsed out. Let's pretend you assigned it via var skypeData = JSON.parse(json string here);, the persons skype number is accessible via skypeData.person['phone number'].skype. We have to use ['phone number'] instead of person.phone number.skype because of the space.