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docs/components/examples/signals/derived.js

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+import { S } from "deka-dom-el/signals";
+
+// Create base signals
+const firstName = S("John");
+const lastName = S("Doe");
+
+// Create a derived signal
+const fullName = S(() => firstName.get() + " " + lastName.get());
+
+// The fullName signal updates automatically when either dependency changes
+S.on(fullName, name => console.log("Name changed to:", name));
+
+firstName.set("Jane"); // logs: "Name changed to: Jane Doe"