How can I prevent body scrolling when opening a fullscreen mobile navigation menu and enable scrolling when closing it in Webflow?

To prevent body scrolling when opening a fullscreen mobile navigation menu in Webflow, you can apply some custom CSS and a little bit of JavaScript. Here's a step-by-step guide to achieving this:

Step 1: Add custom code to the head tag
Inside the Project Settings of your Webflow project, go to the Custom Code section. In the Head Code section, add the following CSS style to disable scrolling on the body:

```css

```

Step 2: Add custom code to the Footer Code
Still in the Custom Code section of the Project Settings, go to the Footer Code section. Add the following JavaScript code:

```javascript

```

Step 3: Design your fullscreen mobile navigation menu
Create your navigation menu as you normally would in Webflow, ensuring that it has a full-screen layout for mobile devices.

Step 4: Add an interaction to the menu trigger button
Select the button or element that triggers the opening and closing of the mobile navigation menu. Add an interaction to it (e.g., click) in the Webflow Designer.

Step 5: Add custom code to the interaction
Click on the newly created interaction, and in the settings panel, click on the "Add custom code" section. Add the following JavaScript code to call the `toggleMenu` function we created earlier:

```javascript

```

Step 6: Test the mobile menu behavior
Preview and test your site on different mobile devices or screen sizes. You should now be able to prevent body scrolling when opening the fullscreen mobile navigation menu and re-enable scrolling when closing it.

This approach will add a class of `disable-scroll` to the body element when the menu is open, which will prevent scrolling. When the menu is closed, the class will be removed, re-enabling scrolling.

Remember, this solution requires some knowledge of CSS and JavaScript. If you're not comfortable with custom code, you can also achieve similar results using built-in Webflow interactions.