diff --git a/src/library-authoring/data/api.js b/src/library-authoring/data/api.js
index ff0dd3dec5..faebcb12f9 100644
--- a/src/library-authoring/data/api.js
+++ b/src/library-authoring/data/api.js
@@ -1,12 +1,21 @@
 // @ts-check
-import type { ContentLibrary } from './types';
 import { camelCaseObject, getConfig } from '@edx/frontend-platform';
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 
-const getApiBaseUrl = (): string => getConfig().STUDIO_BASE_URL;
-const getContentLibraryApiUrl = (libraryId: string) => `${getApiBaseUrl()}/api/libraries/v2/${libraryId}/`;
+const getApiBaseUrl = () => getConfig().STUDIO_BASE_URL;
+/**
+ * Get the URL for the content library API.
+ * @param {string} libraryId - The ID of the library to fetch.
+ */
+const getContentLibraryApiUrl = (libraryId) => `${getApiBaseUrl()}/api/libraries/v2/${libraryId}/`;
 
-export async function getContentLibrary(libraryId: string): Promise<ContentLibrary> {
+/**
+ * Fetch a content library by its ID.
+ * @param {string} [libraryId] - The ID of the library to fetch.
+ * @returns {Promise<import("./types.mjs").ContentLibrary>}
+ */
+/* eslint-disable import/prefer-default-export */
+export async function getContentLibrary(libraryId) {
   const { data } = await getAuthenticatedHttpClient().get(getContentLibraryApiUrl(libraryId));
   return camelCaseObject(data);
 }
diff --git a/src/library-authoring/data/apiHook.js b/src/library-authoring/data/apiHook.js
index 53509fbe3b..8f11e49a4e 100644
--- a/src/library-authoring/data/apiHook.js
+++ b/src/library-authoring/data/apiHook.js
@@ -1,5 +1,5 @@
 // @ts-check
-import React, { useEffect } from 'react';
+import React from 'react';
 import { useQuery } from '@tanstack/react-query';
 import { MeiliSearch } from 'meilisearch';
 
@@ -8,24 +8,21 @@ import { getContentLibrary } from './api';
 
 /**
  * Hook to fetch a content library by its ID.
+ * @param {string} [libraryId] - The ID of the library to fetch.
  */
-export const useContentLibrary = (libraryId?: string) => {
-  if (!libraryId) {
-    return {
-      data: undefined,
-      error: 'No library ID provided',
-      isLoading: false,
-    }
-  }
-
-  return useQuery({
+export const useContentLibrary = (libraryId) => (
+  useQuery({
     queryKey: ['contentLibrary', libraryId],
     queryFn: () => getContentLibrary(libraryId),
-  });
-};
-
+  })
+);
 
-export const useLibraryComponentCount = (libraryId: string, searchKeywords: string) => {
+/**
+ * Hook to fetch the count of components and collections in a library.
+ * @param {string} libraryId - The ID of the library to fetch.
+ * @param {string} searchKeywords - Keywords to search for.
+ */
+export const useLibraryComponentCount = (libraryId, searchKeywords) => {
   // Meilisearch code to get Collection and Component counts
   const { data: connectionDetails } = useContentSearchConnection();
 
@@ -52,6 +49,4 @@ export const useLibraryComponentCount = (libraryId: string, searchKeywords: stri
     componentCount,
     collectionCount,
   };
-}
-
-
+};
diff --git a/src/library-authoring/data/types.js b/src/library-authoring/data/types.js
deleted file mode 100644
index 1af41a8b1f..0000000000
--- a/src/library-authoring/data/types.js
+++ /dev/null
@@ -1,17 +0,0 @@
-export type ContentLibrary = {
-  id: string;
-  type: string;
-  org: string;
-  slug: string;
-  title: string;
-  description: string;
-  numBlocks: number;
-  version: number;
-  lastPublished: Date | null;
-  allowLti: boolean;
-  allowPublicLearning: boolean;
-  allowPublicRead: boolean;
-  hasUnpublishedChanges: boolean;
-  hasUnpublishedDeletes: boolean;
-  license: string;
-}
diff --git a/src/library-authoring/data/types.mjs b/src/library-authoring/data/types.mjs
new file mode 100644
index 0000000000..34486525d7
--- /dev/null
+++ b/src/library-authoring/data/types.mjs
@@ -0,0 +1,18 @@
+/**
+  * @typedef {Object} ContentLibrary
+  * @property {string} id
+  * @property {string} type
+  * @property {string} org
+  * @property {string} slug
+  * @property {string} title
+  * @property {string} description
+  * @property {number} numBlocks
+  * @property {number} version
+  * @property {Date | null} lastPublished
+  * @property {boolean} allowLti
+  * @property {boolean} allowPublicLearning
+  * @property {boolean} allowPublicRead
+  * @property {boolean} hasUnpublishedChanges
+  * @property {boolean} hasUnpublishedDeletes
+  * @property {string} license
+  */