JavaScript JSON parse() Method

Below is the example of the JSON parse() Method.

  • Example:
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    <script>
            var obj = JSON.parse('{"var1":"Geeks", 
                                   "var2":"forGeeks!"}');
              
            document.write(obj.var1 + "" + obj.var2);
    </script>                   

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  • Output:

    GeeksforGeeks!
    

    • 



The JSON.parse() method in JavaScript is used to parse a JSON string which is written in a JSON format and return a JavaScript object. 


Syntax:


JSON.parse( string, function )


Parameters: This method accepts two parameter as mentioned above and described below:


    

  • string: It is required parameter and it contains string which is written in JSON format.
    • 

  • function: It is optional parameter and used to transform result. The function called for each item.
    • 



More example codes for the above method are as follows:




Example 1: This example parse a string and return the JavaScript object.











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<!DOCTYPE html> 


<html> 


  


<head> 


    <title> 


        JavaScript JSON parse() Method 


    </title> 


</head> 


  


<body> 


      


    <h1>GeeksforGeeks</h1> 


      


    <h2> 


        JavaScript JSON parse() Method 


    </h2> 


      


    <p id="GFG"></p> 


      


    <!-- Script to parse a string and return 


        JavaScript object -->


    <script> 


        var obj = JSON.parse('{"var1":"Hello",  


                               "var2":"Geeks!"}'); 


          


        document.getElementById("GFG").innerHTML 


                = obj.var1 + " " + obj.var2; 


    </script> 


</body> 


  


</html>                     



















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Output:

Image


Example 2: This example use reviver function to parse a string and return the JavaScript object.











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<!DOCTYPE html> 


<html> 


  


<head> 


    <title> 


        JavaScript JSON parse() Method 


    </title> 


</head> 


  


<body> 


      


    <h1>GeeksforGeeks</h1> 


      


    <h2> 


        JavaScript JSON parse() Method 


    </h2> 


      


    <p id="GFG"></p> 


      


    <!-- Script to parse a string and return 


        JavaScript object -->


    <script> 


        var text = '{ "var1":"Amanda", "gender":"male"}'; 


          


        var obj = JSON.parse(text, function (key, value) { 


            if (value == "male") { 


                return ("female"); 


            } else { 


                return value; 


            } 


        }); 


        document.getElementById("GFG").innerHTML 


                = obj.var1 + ", " + obj.gender;  


    </script> 


</body> 


  


</html>                     



















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Output:

Image


Supported browsers:


    

  • Chrome 4.0
    • 

  • Firefox 3.5
    • 

  • Opera 11.0
    • 

  • Internet Explorer 8.0
    • 

  • Safari 4.0
    • 



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