color cookie

app/composables/ui_color.ts

@@ -0,0 +1,16 @@
+import type {CookieRef} from "#app";
+
+export function ui_color_cookie(): CookieRef<string> {
+
+    const c = useCookie("ui_color",{
+        default: () => "green",
+
+    });
+    watch(c, (newVal, oldVal) => {
+        document.body.classList.remove(oldVal);
+        document.body.classList.add(newVal);
+    })
+
+    return c;
+
+}