How can I apply the is-active class to my Webflow View-all radio button using FinSweet's attributes method for filtering a CMS of blog posts?

To apply the `is-active` class to your Webflow View-all radio button using FinSweet's attributes method for filtering a CMS of blog posts, you can follow these steps:

1. Make sure you have the FinSweet Filtering plugin installed in your Webflow project. You can find and add the plugin from the Webflow Community Plugins section.

2. Once you have the plugin installed, open the page where you have your blog posts and the filtering functionality implemented.

3. In your HTML structure, find the radio button element that represents the View-all option. It should have a specific class or ID assigned to it.

4. In the Webflow Designer, select the radio button element and open the settings panel on the right-hand side.

5. Scroll down to the "Attributes" section and click the "+" button to add a new attribute.

6. In the "Name" field, enter `data-filter-default`. This attribute is specific to FinSweet's filtering plugin and will be used to determine the default state of the filter.

7. In the "Value" field, enter `is-active`. This value represents the class that will be applied to the View-all radio button when the page loads.

8. Save the changes and preview your site. You should now see that the View-all radio button has the `is-active` class applied to it.

The FinSweet Filtering plugin uses these custom attributes to handle the filtering functionality. When a user selects a different filter option, the plugin will apply the `is-active` class to the currently selected filter button and remove it from the previous one.

By following these steps and using the `data-filter-default` attribute with a value of `is-active`, you can mark the View-all radio button as active by default when the page loads.