What's a concrete example of interaction design?

Everything around a single button press: hover and pressed states, loading feedback, optimistic updates, error recovery, and the transition that shows what changed. Multiply that by every control in the product — that's the discipline.

How does interaction design relate to UX design?

Interaction design is a subset of UX focused on moment-to-moment behavior — states, feedback, motion. UX also covers the larger structure: flows, information architecture, and what the screens are in the first place.

Interaction Design

Designing the moment-to-moment behavior of an interface — how it responds to input, transitions between states, and gives feedback.

Design Disciplines

Interaction design (often shortened to IxD) is about behavior over time: what happens when you tap, drag, hover, submit, or wait. It defines states (default, loading, error, empty, success), transitions between them, and the micro-feedback that tells a user their action registered.

Good interaction design is mostly invisible — it removes doubt. When a button visibly reacts, a form explains its error inline, or a list animates a new item into place, that is interaction design making the product feel responsive and trustworthy.

In practice

Consider a dashboard's “save” moment. Weak interaction design: the user clicks, nothing visibly happens for two seconds, they click again, two records save. Strong interaction design: the button switches to a spinner instantly, the row updates optimistically, and a failure rolls back with an inline explanation and a retry. Same feature, same visuals — completely different trust level. Interaction design is that layer of states, feedback, and timing that makes software feel reliable.

Interaction Design

In practice

Frequently Asked Questions