related_repos_bookmarklet.js

gistfile1.txt

const url = window.location.href;
const GITHUB_REGEX = new RegExp("(?:http|https):\\/\\/github.com\\/([A-Za-z0-9-]+)\\/([A-Za-z0-9-_\\.]+)");
const res = GITHUB_REGEX.exec(url);
if(!res) {
  alert('Please first visit a repo on GitHub.\nFor example: github.com/airbnb/javascript');
} else {
  window.open(`https://relatedrepos.com/gh/${res[1]}/${res[2]}`, '_blank');
}