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Sort Reddit home feed by whatever you want, persistently

Forces Reddit Home to open with your last‑chosen sort (Best, Hot, New, Top, Rising) by replacing the functionality of the existing dropdown on the new Reddit home page.

安裝腳本?
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安裝腳本 
// ==UserScript==
// @name         Sort Reddit home feed by whatever you want, persistently
// @namespace    plennhar-sort-reddit-home-feed-by-whatever-you-want-persistently
// @version      1.0
// @description  Forces Reddit Home to open with your last‑chosen sort (Best, Hot, New, Top, Rising) by replacing the functionality of the existing dropdown on the new Reddit home page.
// @author       Plennhar
// @match        https://www.reddit.com/*
// @match        https://old.reddit.com/*
// @grant        GM_getValue
// @grant        GM_setValue
// @run-at       document-start
// @license      GPL-3.0-or-later
// ==/UserScript==
// SPDX-FileCopyrightText: 2025 Plennhar
// SPDX-License-Identifier: GPL-3.0-or-later

(() => {
  const SORT_KEY     = 'preferredHomeSort';
  const DEFAULT_SORT = 'best';                     // first‑install fallback
  const sortMap = {                               // path for each sort
    best:   '/best/?feed=home',
    hot:    '/hot/?feed=home',
    new:    '/new/?feed=home',
    top:    '/top/?feed=home',
    rising: '/rising/?feed=home'
  };

  let preferred = (GM_getValue(SORT_KEY, DEFAULT_SORT) || DEFAULT_SORT).toLowerCase();

  // Redirecting
  function isHomeLike(pathname) {
    const p = pathname.replace(/\/+$/, '').toLowerCase(); // trim trailing slash
    return (
      p === '' ||                               // "/"
      Object.keys(sortMap).some(s => p === '/' + s)
    );
  }

  function enforcePreferred() {
    if (!isHomeLike(location.pathname)) return;
    const target = sortMap[preferred];
    if (!target) return;                         // unknown preference
    const current = location.pathname + location.search;
    if (!current.startsWith(target)) {
      location.replace(target);
    }
  }

  // Run immediately and whenever SPA navigation runs
  enforcePreferred();
  const origPushState = history.pushState;
  history.pushState = function () {
    origPushState.apply(this, arguments);
    setTimeout(enforcePreferred, 0);
  };
  window.addEventListener('popstate', enforcePreferred);

  // Dropdown hook
  function hookDropdown() {
    const dropdown = document.querySelector('shreddit-sort-dropdown');
    if (!dropdown || dropdown.dataset.hooked) return; // not yet or already
    dropdown.dataset.hooked = 'true';

    // Capturing link clicks inside the dropdown BEFORE Reddit's router runs
    dropdown.addEventListener(
      'click',
      (ev) => {
        const anchor = ev.target.closest('a[href*="/?feed=home"]');
        if (!anchor) return;
        const m = anchor.getAttribute('href').match(/^\/([^\/]+)\/\?feed=home/);
        if (m) {
          preferred = m[1].toLowerCase();
          GM_setValue(SORT_KEY, preferred);
        }
        // let the click proceed normally (navigation or pushState)
      },
      true // capture phase so this runs first
    );
  }

  // Observe DOM for the dropdown, then once it exists hook into it once
  const observer = new MutationObserver(hookDropdown);
  observer.observe(document.documentElement, { childList: true, subtree: true });
})();