Déjà Viewport: Designing for Dual Screen Devices
Four years ago, the Surface Duo pushed web developers to think about a screen with a seam down the middle. Now, with the iPhone Duo, dual-screen design is back, and this time it’s in a lot more pockets. This talk revisits the lessons from the first wave of dual-screen devices, looks at how the web platform has caught up since, including CSS and JavaScript APIs for detecting and laying out across viewport segments, and offers practical patterns for designing layouts that work whether your content spans one screen, two, or the fold in between.