remix-syntax/app/routes/syntax.tsx

import { Link, Outlet, useLoaderData } from "remix";
import styles from '~/styles/syntax.css';
import type { Show } from './syntax/$show'
import { padNumber } from "~/utils/pad";

export function links() {
  return [
    {
      rel: "stylesheet",
      href: styles
    }
  ];
}

// Server only loader function
export let loader = async () => {
  const response = await fetch('https://syntax.fm/api/shows')
  const shows: Show[] = await response.json();

  return {
    podcastName: 'The Syntax Podcast',
    shows,
  };
}

export default function () {
  let { podcastName, shows } = useLoaderData<{podcastName: string, shows: Show[]}>();

  return (
    <div>
      <section>
        <h1>{podcastName}</h1>
      </section>
      <section className="cols">
        <aside className="playlist">
          <nav>
            <ul>
              {shows.map(show =>
                <li key={show.number}>
                  <Link to={`/syntax/${padNumber(show.number)}`}>
                    #{show.number}: {show.title}
                  </Link>
                </li>
              )}
            </ul>
          </nav>
        </aside>
        <Outlet context={{ podcastName }} />
      </section>
    </div>
  );
}