What separates a functional product from an unforgettable one? In almost every case, it is the micro-interactions.

Principles of Micro-interactions

  1. Trigger: An intuitive cue that prompts an action.
  2. Feedback: Visual or auditory confirmation of the state transition.
  3. Restraint: If an animation draws attention to itself rather than facilitating the task, it is too loud.
“Details are not details. They make the design.” — Charles Eames

Subtle spring physics and opacity transitions communicate weight and polish.