Grabbed dndbeyond's source code

```
~/go/bin/sourcemapper -output ddb -jsurl https://media.dndbeyond.com/character-app/static/js/main.90aa78c5.js
```

ddb_main/hooks/useApiCall.ts

@@ -0,0 +1,48 @@
+import { useCallback, useState } from "react";
+
+const identity = (x) => x;
+
+/**
+ * Hook that encapsulates loading/error state setting when calling an API promise
+ * Usage:
+ * const [
+ *   doThing, // callback to invoke to initiate the API call
+ *   isDoingThing, // boolean indicating if the API call is in progress
+ *   errorDoingThing, // error object indicating if there was an error caught (whatever param is passed to the .catch() callback)
+ * ] = useApiCall(MyApiUtils.doThing);
+ * @param {function} apiFunc The API function to use for setting loading/error state - Must return a promise!
+ * @param {function} [onSuccess] Optional callback invoked if the apiFunc promise succeeds
+ * @returns {[function, boolean, any]} An array containing a callback to initiate the API call, a isLoading boolean, and an error object
+ */
+const useApiCall = (apiFunc, onSuccess = identity) => {
+  const [isLoading, setIsLoading] = useState(false);
+
+  const [error, setError] = useState(null);
+
+  const makeCall = useCallback(
+    (...args) => {
+      setIsLoading(true);
+      setError(null);
+
+      apiFunc(...args)
+        .then(onSuccess)
+        .then(() => {
+          setIsLoading(false);
+        })
+
+        .catch((err) => {
+          setIsLoading(false);
+          setError(err);
+        });
+    },
+    [apiFunc, onSuccess]
+  );
+
+  return [
+    makeCall as (...args: any[]) => void,
+    isLoading as boolean,
+    error as any,
+  ];
+};
+
+export default useApiCall;