Conver Toughest Sell to PDF

convert.ts

// Create a free account at browserless.io, then run this in the BaaS debugger (it'll return a PDF)
export default async ({ page }) => {
  const chapters = [];
  await page.goto('https://derekyan.com/ma-book/');
  const chapterLinks = await page.evaluate(() => [...document.querySelectorAll('a.toc-item')].map(i => i.href));

  for (const chapter of chapterLinks) {
    await page.goto(chapter);
    const content = await page.evaluate(() => document.querySelector('.chapter-content').innerHTML);
    chapters.push(content);
  }

  // Now, let's get some simple markdown CSS for print
  await page.goto('https://raw.githubusercontent.com/simonlc/Markdown-CSS/master/markdown.css');
  const stylesheet = await page.evaluate(() => document.body.innerText);

  // Finally, let's inject the above in a blank page and print it.
  await page.goto('about:blank');
  await page.setContent(chapters.join('\n'));
  await page.addStyleTag({ content: stylesheet });
  
  // Return a PDF buffer to trigger the editor to download.
  return page.pdf();
};