GitHub Inline Issue Link Bypass

Force normal navigation for GitHub issue and PR links that GitHub opens in preview modals.
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// ==UserScript==
// @name         GitHub Inline Issue Link Bypass
// @namespace    https://github.com/
// @version      0.1.0
// @description  Force normal navigation for GitHub issue and PR links that GitHub opens in preview modals.
// @author       alexchexes
// @icon         https://www.google.com/s2/favicons?sz=64&domain=github.com
// @match        https://github.com/*
// @run-at       document-start
// @grant        none
// @license      MIT
// @contributionURL https://ko-fi.com/alexchexes
// @contributionURL https://github.com/sponsors/alexchexes
// ==/UserScript==

(() => {
  'use strict';

  const allowedHovercardTypes = new Set(['issue', 'pull_request']);
  const issuePathPattern = /^\/[^/?#]+\/[^/?#]+\/(?:issues|pull)\/\d+$/;

  function getAnchorFromEvent(event) {
    if (typeof event.composedPath === 'function') {
      for (const node of event.composedPath()) {
        if (node instanceof HTMLAnchorElement && node.href) {
          return node;
        }
      }
    }

    if (!(event.target instanceof Node)) {
      return null;
    }

    const element =
      event.target.nodeType === Node.ELEMENT_NODE
        ? event.target
        : event.target.parentElement;

    return element?.closest?.('a[href]') ?? null;
  }

  function getForcedNavigationHref(event, anchor) {
    if (event.button !== 0) {
      return null;
    }

    if (event.metaKey || event.ctrlKey || event.shiftKey || event.altKey) {
      return null;
    }

    if (anchor.hasAttribute('download')) {
      return null;
    }

    if (anchor.target && anchor.target.toLowerCase() !== '_self') {
      return null;
    }

    if (!allowedHovercardTypes.has(anchor.dataset.hovercardType || '')) {
      return null;
    }

    const url = new URL(anchor.href, location.href);

    if (url.origin !== location.origin) {
      return null;
    }

    if (!issuePathPattern.test(url.pathname)) {
      return null;
    }

    return url.href;
  }

  window.addEventListener(
    'click',
    (event) => {
      const anchor = getAnchorFromEvent(event);

      if (!anchor) {
        return;
      }

      const href = getForcedNavigationHref(event, anchor);

      if (!href) {
        return;
      }

      event.preventDefault();
      event.stopImmediatePropagation();
      location.assign(href);
    },
    { capture: true, passive: false }
  );
})();