Jesus sucks

backend/frontend/node_modules/@restart/hooks/esm/useMounted.js

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+import { useRef, useEffect } from 'react';
+
+/**
+ * Track whether a component is current mounted. Generally less preferable than
+ * properlly canceling effects so they don't run after a component is unmounted,
+ * but helpful in cases where that isn't feasible, such as a `Promise` resolution.
+ *
+ * @returns a function that returns the current isMounted state of the component
+ *
+ * ```ts
+ * const [data, setData] = useState(null)
+ * const isMounted = useMounted()
+ *
+ * useEffect(() => {
+ *   fetchdata().then((newData) => {
+ *      if (isMounted()) {
+ *        setData(newData);
+ *      }
+ *   })
+ * })
+ * ```
+ */
+export default function useMounted() {
+  const mounted = useRef(true);
+  const isMounted = useRef(() => mounted.current);
+  useEffect(() => {
+    mounted.current = true;
+    return () => {
+      mounted.current = false;
+    };
+  }, []);
+  return isMounted.current;
+}