Changed 29 solution

Author: mattpocock

src/06-challenges/29-infinite-scroll.solution.ts

@@ -1,14 +1,14 @@
 import { expect, it } from "vitest";
 import { Equal, Expect } from "../helpers/type-utils";
 
-interface InfiniteScrollParams<TRow> {
+type MakeInfiniteScrollParams<TRow> = {
   key: keyof TRow;
-  fetchRows: () => Promise<TRow[]>;
   initialRows?: TRow[];
-}
+  fetchRows: () => Promise<TRow[]> | TRow[];
+};
 
-const makeInfiniteScroll = <TRow>(params: InfiniteScrollParams<TRow>) => {
-  const data: TRow[] = params.initialRows || [];
+const makeInfiniteScroll = <TRow>(params: MakeInfiniteScrollParams<TRow>) => {
+  const data = params.initialRows || [];
 
   const scroll = async () => {
     const rows = await params.fetchRows();
@@ -24,7 +24,7 @@ const makeInfiniteScroll = <TRow>(params: InfiniteScrollParams<TRow>) => {
 it("Should fetch more data when scrolling", async () => {
   const table = makeInfiniteScroll({
     key: "id",
-    fetchRows: () => Promise.resolve([{ id: 1, name: "John" }]),
+    fetchRows: async () => [{ id: 1, name: "John" }],
   });
 
   await table.scroll();
@@ -72,6 +72,6 @@ it("Should allow you to pass initialRows", () => {
   ]);
 
   type tests = [
-    Expect<Equal<typeof rows, Array<{ id: number; name: string }>>>,
+    Expect<Equal<typeof rows, Array<{ id: number; name: string }>>>
   ];
 });