parser.js

import * as cheerio from 'cheerio';

const linkStartIndex = '/docs/'.length;

export const parseRows = (html) => {
  const $ = cheerio.load(html);

  // Learnxinyminutes has multiple topics (not just programming languages!),
  // each of which are separated into their own <table>
  const tables = $('table');

  // Collect all of the pages from within each topic group
  return tables.reduce((pages, table) => {
    return pages.concat(
      Array.from(table.querySelectorAll('tr'))
        // Exclude the first <tr> element as it is the <thead>;
        .slice(1)
        .map((row) => {
          // Get the page name
          const link = row.querySelector('.name').firstElementChild;
          return {
            // Unfortunately JSDOM doesn't define innerText, so we need to use
            // textContent and then trim whitespaces/newlines
            name: (link?.textContent || '').trim(),
            // Extract the URL param for this page, then remove the trailing '/'
            link: link?.href?.slice(linkStartIndex).split('/')[0],
          };
        })
    );
  }, []);
};