json strings code example

Example 1: json object

var myObj, x;
myObj = {"name":"John", "age":30, "car":null};
x = myObj.name;
document.getElementById("demo").innerHTML = x;

Example 2: correct json type

For JSON text:

application/json

The MIME media type for JSON text is application/json. 
The default encoding is UTF-8. (Source: RFC 4627).

For JSONP (runnable javascript) with callback:

application/javascript