How can I pass URL parameters to a button on my Webflow page that redirects to another site, while capturing the traffic source for non-Webflow form submissions?

To pass URL parameters to a button on your Webflow page to redirect to another site, you can use custom code and JavaScript. Here's a step-by-step guide to achieving this:

Step 1: Add a button to your Webflow page
Drag a button element onto your page or locate the existing button you want to use.

Step 2: Add a custom attribute
Select the button and go to the Settings panel on the right-hand side. Scroll down to the "Attributes" section and click on the "+" icon to add a custom attribute. Name the attribute, e.g., "data-redirect-url" (without the quotes).

Step 3: Specify the redirect URL
In the value field of the custom attribute, enter the URL where you want the button to redirect. You can specify the complete URL including any additional parameters you want to pass. For example, if you want to pass a parameter called "source" with a value of "webflow", the value could be something like: `https://example.com?source=webflow`.

Step 4: Add custom code
Now, you need to add a custom code block to your Webflow project. You can do this by selecting the page or the entire site from the navigation panel and choosing the "Custom Code" tab.

Step 5: Write JavaScript code
Inside the custom code block, you'll write JavaScript code to capture the URL parameters and redirect when the button is clicked. Here's an example code snippet:

```javascript

```

Step 6: Publish and test
Don't forget to publish your site for the changes to take effect. Now, when you visit the page and click the button, it should redirect to the specified URL while retaining any URL parameters passed to the original page. The captured URL parameters will be appended to the redirect URL.

Please note that the JavaScript code snippet provided is a starting point, and you may need to modify it based on your specific requirements or to handle edge cases. Additionally, make sure to test the functionality thoroughly to ensure it works as expected.