How to add a parameter to the URL in JavaScript ?

Last Updated : 15 Jan, 2024

Given a URL the task is to add parameter (name & value) to the URL using JavaScript.

URL.searchParams: This read-only property of the URL interface returns a URLSearchParams object providing access to the GET-decoded query arguments in the URL.

Table of Content

Using the append method
Using set method

Approach 1: Using the append method

In this approach, we can use the URLSearchParams interface to easily append or set parameters to a URL. The append method allows us to add a new parameter to the existing set.

Example: This example adds the parameter by using the append method. This HTML document displays a webpage with a button. When the button is clicked, the JavaScript function GFG_Fun() appends a new parameter ('param_1' with the value 'val_1') to the URL and updates the displayed URL accordingly.

html

<!DOCTYPE HTML> 
<html> 
    <head> 
        <title> 
            How to add a parameter to the URL 
        </title>     
    </head> 
    
    <body style = "text-align:center;"> 
        
        <h1 style = "color:green;" > 
            GeeksForGeeks 
        </h1> 
        
        <p id = "GFG_UP" style = 
            "font-size: 15px; font-weight: bold;"> 
        </p> 
        
        <button style = "cursor: pointer;" onclick = "GFG_Fun()"> 
            Add Parameter 
        </button> 
        
        <p id = "GFG_DOWN" style = 
            "color:green; font-size: 20px; font-weight: bold;"> 
        </p> 
        
        <script> 
            let up = document.getElementById('GFG_UP'); 
            let url = new URL("https://www.geeksforgeeks.org"); 
            up.innerHTML = url; 
            let down = document.getElementById('GFG_DOWN'); 
            
            function GFG_Fun() { 
                url.searchParams.append('param_1', 'val_1'); 
                down.innerHTML = url; 
            } 
        </script> 
    </body> 
</html>

Output:

parameter

Approach 2: Using set method

In this approach, we leverage the URL object and its searchParams property to directly set a new parameter without the need for creating a separate URLSearchParams object.

Example: In this HTML document, a webpage is presented with a button. Upon clicking the button, the JavaScript function GFG_Fun() uses the set method to update the URL parameter ('param_1') to a new value ('val_1'), and then it dynamically displays the updated URL on the webpage.