How to serialize an object to query string using jQuery ?

Given a jQuery object and the task is to serialize the object element into the query string using JQuery.

Approach 1:

  • Declare an object and store it into the variable.
  • Use JSON.stringify() method to convert the object into strings and display the string contents.
  • Use param() method to serialize the object element as query string and store it into a variable.
  • Display the serialize object as query string.

Example: This example uses the param() method to serialize the object.

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<!DOCTYPE html>
<html>
  
<head>
    <title>
        JQuery | Serialize object to query string.
    </title>
    <style>
        #GFG_UP {
            font-size: 17px;
            font-weight: bold;
        }
          
        #GFG_UP2 {
            font-size: 20px;
            font-weight: bold;
            color: green;
        }
          
        #GFG_DOWN {
            color: green;
            font-size: 24px;
            font-weight: bold;
        }
          
        button {
            margin-top: 20px;
        }
    </style>
</head>
<script src=
     "https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js">
</script>
  
<body style="text-align:center;" id="body">
    <h1 style="color:green;"> 
            GeeksforGeeks 
        </h1>
    <p id="GFG_UP">
    </p>
    <p id="GFG_UP2">
    </p>
    <button>
        click here
    </button>
    <p id="GFG_DOWN">
    </p>
    <script>
        $('#GFG_UP')
        .text('Click the button to serialize the object to query string');
        var data = {
            param1: 'val_1',
            param2: 'val_2',
            param3: 'val_3'
        };
        $('#GFG_UP2').text(JSON.stringify(data));
        $('button').on('click', function() {
            var result = $.param(data);
            $('#GFG_DOWN').text(result);
        });
    </script>
</body>
  
</html>

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Output:


    

  • 
Before clicking the button:
    


    • 

  • 
After clicking the button:
    


    • 



Approach 2:




    

  • Declare an object and store it into the variable.
    • 

  • Use JSON.stringify() method to convert the object into strings and display the string contents.
    • 

  • Click on the button to call convert() function which convert the serialize object to query string.
    • 

  • The convert() function uses keys() and map() method to convert the serialize object to query string.
    • 



Example: This example creates a function which is taking each key, value pair and appending them as a string to get the query string keys() and map() method.











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<!DOCTYPE html> 


<html> 


  


<head> 


    <title> 


        JQuery | Serialize object to query string. 


    </title> 


    <style> 


        #GFG_UP { 


            font-size: 17px; 


            font-weight: bold; 


        } 


          


        #GFG_UP2 { 


            font-size: 20px; 


            font-weight: bold; 


            color: green; 


        } 


          


        #GFG_DOWN { 


            color: green; 


            font-size: 24px; 


            font-weight: bold; 


        } 


          


        button { 


            margin-top: 20px; 


        } 


    </style> 


</head> 


<script src= 


    "https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"> 


</script> 


  


<body style="text-align:center;" id="body"> 


    <h1 style="color:green;">  


            GeeksforGeeks  


        </h1> 


    <p id="GFG_UP"> 


    </p> 


    <p id="GFG_UP2"> 


    </p> 


    <button> 


        click here 


    </button> 


    <p id="GFG_DOWN"> 


    </p> 


    <script> 


        $('#GFG_UP') 


        .text('Click the button to serialize the object to query string'); 


        var data = { 


            param1: 'val_1', 


            param2: 'val_2', 


            param3: 'val_3' 


        }; 


        $('#GFG_UP2').text(JSON.stringify(data)); 


  


        function convert(json) { 


            return '?' + 


                Object.keys(json).map(function(key) { 


                    return encodeURIComponent(key) + '=' + 


                        encodeURIComponent(json[key]); 


                }).join('&'); 


        } 


        $('button').on('click', function() { 


            var result = convert(data); 


            $('#GFG_DOWN').text(result); 


        }); 


    </script> 


</body> 


  


</html> 



















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Output:


    

  • 
Before clicking the button:
    


    • 

  • 
After clicking the button:
    


    • 



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