The article explores the growing trend of dual-screen and foldable devices, emphasizing their potential to enhance productivity and media consumption. As these devices become more prevalent, front-end developers face new challenges in making websites responsive to the unique screen resolutions and hinge placements of dual-screen devices. To address these challenges, Microsoft has introduced new CSS and JavaScript APIs, such as the CSS Screen Spanning Media Feature and the JavaScript Visual Viewport Segments API, designed to optimize content for these devices. The article provides detailed instructions and examples for utilizing these APIs, including a demonstration of making a blog responsive for dual-screen displays. Despite being in the experimental phase, these APIs represent significant steps toward accommodating the evolving landscape of device form factors, offering developers opportunities to create more engaging and user-friendly experiences.