사소한 리팩토링

src/lib/utils/promise.ts

@@ -1,16 +1,16 @@
 export const monotonicResolve = <T>(
-  promises: (Promise<T | undefined> | false)[],
+  promises: (Promise<T> | false)[],
   callback: (value: T) => void,
 ) => {
   let latestResolvedIndex = -1;
-
-  promises.forEach((promise, index) => {
-    if (!promise) return;
-    promise.then((value) => {
-      if (value !== undefined && index > latestResolvedIndex) {
-        latestResolvedIndex = index;
-        callback(value);
-      }
+  promises
+    .filter((promise) => !!promise)
+    .forEach((promise, index) => {
+      promise.then((value) => {
+        if (index > latestResolvedIndex) {
+          latestResolvedIndex = index;
+          callback(value);
+        }
+      });
     });
-  });
 };