Example of a pagination middleware using 'node-fetch' and 'restana'.

index.ts

import fetch from "node-fetch";
import restana from "restana";

const service = restana();

const pageSize = process.env.PAGE_SIZE ? parseInt(process.env.PAGE_SIZE) : 5;

const port = process.env.PORT ? parseInt(process.env.PORT) : 3000;

const topStoriesResponse = await fetch(
  "https://hacker-news.firebaseio.com/v0/topstories.json?print=pretty"
);

const topStories = (await topStoriesResponse.json()) as number[];

service.get("/page/:id", (request, response) => {
  const topStoriesStartIndex = parseInt(request.params.id) * pageSize;
  const topStoriesEndIndex = topStoriesStartIndex + pageSize;
  const pageContent = topStories.slice(
    topStoriesStartIndex,
    topStoriesEndIndex
  );
  response.send(pageContent);
});

console.log(`Server started on port ${port}.`);

service.start(port);

package.json

{
  "name": "hacker-news-pagination",
  "version": "1.0.0",
  "private": "true",
  "type": "module",
  "scripts": {
    "start": "tsx watch index.ts"
  },
  "devDependencies": {
    "node-fetch": "^3.3.0",
    "restana": "^4.9.7",
    "tsx": "^3.12.3"
  }
}