A designer’s work is not only about how the things look, but also their behaviors in response to interaction, and the adjustments they make between their fixed states. In fact, designing the way elements adapt and morph in the in-between moments is half of your work as a designer. You’re crafting the interstitials.

We’ve been more aware of this interstitial work in the past few years because of responsive design’s popularity and its resistance to fixed states. It’s a step in the right direction, but it has made work crazy frustrating. Frank Chimero.