Browser Links

import puppeteer from "@cloudflare/puppeteer";import type { Page } from "@cloudflare/puppeteer";import { DEFAULT_VIEWPORT, NAVIGATION_TIMEOUT_MS } from "../constants/defaults";import { normalizeLinks } from "./links";import type { LinksResponse, PageLink } from "../types/links";export async function withBrowserPage<T>(  browserBinding: Fetcher,  url: string,  fn: (page: Page) => Promise<T>): Promise<T> {  let browser: Awaited<ReturnType<typeof puppeteer.launch>> | null = null;  try {    browser = await puppeteer.launch(browserBinding);    const page = await browser.newPage();    await page.setViewport(DEFAULT_VIEWPORT);    await page.goto(url, {      waitUntil: "networkidle0",      timeout: NAVIGATION_TIMEOUT_MS,    });    return await fn(page);  } finally {    if (browser) {      try {        await browser.close();      } catch {        /* ignore close errors */      }    }  }}export async function extractPageLinks(  browserBinding: Fetcher,  url: string): Promise<LinksResponse> {  const rawLinks = await withBrowserPage(browserBinding, url, async (page) => {    return page.$$eval("a[href]", (anchors) =>      anchors.map((anchor) => ({        href: anchor.href,        text: anchor.textContent ?? "",      }))    );  });  const { links, truncated } = normalizeLinks(rawLinks as PageLink[]);  return {    url,    linkCount: links.length,    truncated,    links,  };}