Apple Design

How Apple builds interfaces that stop feeling like a computer and start feeling like an extension of you. This knowledge comes from Apple's WWDC design talks — chiefly Designing Fluid Interfaces (WWDC 2018) — distilled and translated into the web platform (CSS, Pointer Events, requestAnimationFrame, spring libraries like Motion/Framer Motion).

The through-line: an interface feels alive when motion starts from the current on-screen value, inherits the user's velocity, projects momentum forward, and can be grabbed and reversed at any instant. Springs are the tool that makes all of this natural, because they are inherently interruptible and velocity-aware.