a workaround for node-fetch using esm

src/utils/downloadFile.ts

@@ -2,7 +2,7 @@
  * API for downloading information from web
  */
 import { logger } from "./logger";
-import fetch from "node-fetch";
+import { fetch } from "./fetch";
 
 export async function downloadFromMultiSources(urls: string[]): Promise<string | undefined> {
     for (const url of urls) {

src/utils/fetch.ts

@@ -0,0 +1,7 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+// @ts-check
+
+export const fetch =
+    process.platform
+        ? eval("(...args) => import('node-fetch').then(({default: fetch}) => fetch(...args))")
+        : window.fetch;