Recreating Apple's WWDC 2025 Liquid Glass Effect with CSS, SVG, and Physics

This article delves into recreating the stunning Liquid Glass UI effect showcased at Apple's WWDC 2025. It uses CSS, SVG displacement maps, and physics-based refraction calculations to achieve a convincing approximation. The author explains the principles of refraction, detailing how light bends when passing through different materials and how mathematical functions describe the glass surface shape. SVG displacement maps are then employed to simulate the refraction effect. The article culminates in creating UI components, such as magnifying glasses, search boxes, switches, and sliders, with the Liquid Glass effect. Note that optimal performance is currently seen in Chrome due to browser compatibility with SVG filters as backdrop-filter.