jQuery param() Method

The $.param() method in jQuery is used to serialize a JavaScript object into a query string format. This is commonly used when making AJAX requests or when you need to pass data to a server in the form of URL parameters. The resulting string can be appended to a URL or included in an AJAX request to send data to the server.

$.param(object, traditional)
  1. object: This is the JavaScript object you want to serialize into a query string.
  2. traditional (optional): A Boolean value that specifies whether to use traditional-style param serialization (default is false).

Let's say you have a JavaScript object with some data that you want to send as URL parameters:

var data = { name: "Ebin", age: 30, city: "New York" };

You can use $.param() to serialize this object into a query string:

var queryString = $.param(data); console.log(queryString); //Output: name=Ebin&age=30&city=New+York

This query string can then be appended to a URL or used in an AJAX request.

Using Traditional Serialization

In some cases, you might need to use traditional-style serialization, which formats array and object values differently. To enable this, set the traditional parameter to true:

var data = { name: "Ebin", hobbies: ["Reading", "Gardening"], address: { street: "123 Main St", city: "Los Angeles" } }; var queryString = $.param(data, true); console.log(queryString);

With traditional set to true, the output will be:


Traditional serialization is useful when working with server-side code that expects data in a specific format.

Using in an AJAX Request

One common use case for $.param() is when making AJAX requests with jQuery. You can serialize your data object and include it in the request URL:

var data = { name: "John", age: 30, city: "New York" }; $.ajax({ url: "example.php?" + $.param(data), method: "GET", success: function(response) { // Handle the response from the server } });

In this example, the serialized query string is appended to the URL, and the server can then parse the parameters and respond accordingly.


The $.param() method is a handy utility in jQuery for converting JavaScript objects into URL query strings, making it easier to work with data in various web development scenarios.