Reactivity

SUS uses reactive sources similar to Vue refs:

public Prop<string> Title = new("Hello");
public Prop<int> Count = new(0);

Title.Value = "World";
Count.Value++;

• Prop<T> — mutable reactive value
• Computed<T> — derived value
• Watch / WatchEffect — side effects when sources change

Template bindings and :class / v-if re-evaluate when .Value changes.

Full guide: Reactivity