列出博客中的所有出站链接

// assuming I've imported marked.js and psl

let linksByDomain = {};
markedJsRenderer.link = (href, title, text) => {
  // Capture any relative links and note them as coming
  // from my blog. Otherwise parse the link and get the hostname
  let hostname;
  if (href.startsWith(".") || href.startsWith("/")) {
    hostname = "blog.jim-nielsen.com";
  } else {
    hostname = new URL(href).hostname;
  }

  // Turn the hostname into just the domain for even
  // better grouping then add it to our collection of links.
  let domain = psl.get(hostname);
  if (linksByDomain[domain]) {
    linksByDomain[domain].push(href);
  } else {
    linksByDomain[domain] = [href];
  }

  // Other code here
};

{
  "github.com": [
    "https://github.com/username/link/to/something",
    "https://gist.github.com/another/link",
    // more links here
  ],
  "twitter.com": [
    "https://twitter.com/username/019237029381",
    "https://twitter.com/username/192370293812",
    // more links here
  ],
  "mozilla.org": [
    "https://developer.mozilla.org/reference/article",
    "https://developer.mozilla.org/docs/link",
    // more links here
  ]
}