Auto-Filling Hidden Form Fields with JavaScript

This demo shows how to automatically populate a hidden input field inside a native Webflow form using JavaScript. The script (added in the page settings) simulates fetching dynamic data—such as a user’s IP-based location—once the page loads. After retrieving the data, it assigns the value to the hidden field so it becomes part of the form submission. The field’s name attribute (name="ip-location") determines how the value is labeled in the submitted form data, making it easy to access in Webflow or any connected backend. This setup gives you a simple starting point for enriching your form submissions with additional contextual information.