How Can I Modify URL Parameters Dynamically Using JavaScript?

Modifying URL Parameters with JavaScript

In AJAX-intensive web applications, the need arises to modify URL parameters dynamically. Consider a scenario where you need to:

• Original URL: http://server/myapp.php?id=10
• Desired Result: http://server/myapp.php?id=10&enabled=true

To achieve this, JavaScript provides two robust options:

URL Object

The URL object introduced in ECMAScript 6 allows you to manipulate URL components directly. Here's an example:

var url = new URL("http://server/myapp.php?id=10");

// Set a new or update an existing parameter
url.searchParams.set('enabled', 'true');

// Retrieve the modified URL
var modifiedURL = url.href; // http://server/myapp.php?id=10&enabled=true

URLSearchParams Interface

URLSearchParams allows you to manipulate URL parameters as a collection of key-value pairs.

var url = new URL("http://server/myapp.php?id=10");

// Append a new parameter or update a value
var searchParams = new URLSearchParams(url.search);
searchParams.append('enabled', 'true');

// Update the URL
url.search = searchParams.toString(); // http://server/myapp.php?id=10&enabled=true

Implementation Considerations

• Both methods support both appending new parameters and updating existing ones.
• Use url.href or url.toString() to get the modified URL as a string.
• If you encounter browser compatibility issues, consider using libraries like query-string or js-url.

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