Interface PropChangeEventProps

Set when source === "attribute" or a property write reflects to an attribute.

Prop name.

Stored value before this change, or — for a coalesced resume dispatch — the burst-start value the consumer was last told.

Origin label for the most recent user write — "property", "attribute", or undefined if no write has ever landed. Persists across dep-cascade recomputes and across attribute removal: source describes the origin shape of the prop's input, not whether input is currently present. A source: "property" event can therefore mean either "user just wrote" or "user wrote previously, and a cascade just recomputed the visible value" — diff value vs oldValue if you need to tell them apart. Plugins may introduce additional source values; the built-in code only emits the three above.

Current stored value (parsed + converted).