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, and then re-enable scrolling when closing the menu, follow these steps:

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1. Add a Custom Code Snippet

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• Access the Webflow Dashboard and navigate to the Project Settings.
• Go to the Custom Code section, and locate where you can add your custom code in the Footer section.
• Add the following JavaScript snippet:

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• This snippet toggles a no-scroll class on the body element whenever your menu is opened or closed.

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    ```javascript

    <script>

      function toggleMenu(open) {

        document.body.classList.toggle('no-scroll', open);

      }

    </script>

    ```

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2. Create a CSS Class for Preventing Scroll

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• In your Webflow project, go to the Designer view.
• Create a new CSS class called no-scroll.
• Add the following styles to ensure the body doesn't scroll:

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  ```css

  .no-scroll {

    overflow: hidden;

  }

  ```

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3. Set Triggers for the Menu

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• Select your navigation menu element in the Designer.
• Go to the Interactions panel and create a new Mouse Click (or Tap) interaction.
• On the first click (menu open), add a trigger to call the toggleMenu(true) function.
• On the second click (menu closed), add a trigger to call toggleMenu(false).

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4. Test the Interaction

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• Publish your site and test the functionality on your mobile device.
• Make sure that opening the menu hides vertical scrolling and that closing the menu restores it.

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Summary

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To prevent body scrolling when a fullscreen mobile navigation menu is opened in Webflow, add a JavaScript function to toggle a no-scroll class on the body. This class, defined with overflow: hidden;, ensures scrolling is disabled. Set interactions on the menu to call this function with appropriate parameters to control the scroll state when the menu is opened or closed.