How to Append URL Parameters Without Reloading the Page in JavaScript

How to Dynamically Add or Modify URL Parameters Using JavaScript

When working with web applications, handling URL parameters dynamically is crucial. You might need to retrieve all existing query parameters and append new ones without disrupting the current URL structure. In this blog post, we'll explore how to achieve this using JavaScript.

Retrieving All URL Parameters

JavaScript provides several ways to access URL parameters. The most efficient method is using the URLSearchParams API, which allows easy manipulation of query strings.

// Get the full URL
const currentUrl = new URL(window.location.href);

// Retrieve all search parameters
const params = new URLSearchParams(currentUrl.search);

Appending a Custom Parameter

To add a new parameter to the URL without removing existing ones, you can use the set method of URLSearchParams

const currentUrl = new URL(window.location.href);
const params = new URLSearchParams(currentUrl.search);
    
// Add or update the parameter
params.set('new_param_name', 'value');

If you want to update the browser's address bar dynamically, use history.pushState.

// Update the browser URL without reloading the page
window.history.pushState({}, '', currentUrl);

Appending Without Overwriting Existing Values

If you want to append a parameter without replacing existing ones, use the append method instead of set.

// Append the parameter (allows duplicates)
params.append('param_name', 'value');

You can easily retrieve, append, and update query parameters without reloading the page. This is particularly useful for tracking user interactions, managing filters, or passing data between pages in a user-friendly way. 

By leveraging these techniques, you can enhance your web applications and improve user experience effectively!

Thank You!