Only Follow

Redirect Bilibili/Zhihu homepages to follow feeds, even with URL parameters or new tab opens.
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// ==UserScript==
// @name         Only Follow
// @namespace    http://tampermonkey.net/
// @version      2.1
// @description  Redirect Bilibili/Zhihu homepages to follow feeds, even with URL parameters or new tab opens.
// @author       Rive
// @match        *://*.bilibili.com/*
// @match        *://*.zhihu.com/*
// @grant        none
// @license MIT
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';

    /**
     * SILENT MODE:
     * Hide the body immediately to prevent the homepage from flashing.
     */
    function hidePage() {
        if (document.documentElement) {
            document.documentElement.style.display = 'none';
        }
    }

    /**
     * REDIRECT LOGIC:
     * Checks if the current page is the actual homepage (ignoring search parameters).
     */
    function performRedirect() {
        const hostname = window.location.hostname;
        const pathname = window.location.pathname;

        // Bilibili: Match www.bilibili.com/ or www.bilibili.com/index.html
        if (hostname === "www.bilibili.com" && (pathname === "/" || pathname === "/index.html")) {
            hidePage();
            window.location.replace("https://t.bilibili.com/");
        }

        // Zhihu: Match www.zhihu.com/ (usually the feed or login page)
        if (hostname === "www.zhihu.com" && pathname === "/") {
            hidePage();
            window.location.replace("https://www.zhihu.com/follow");
        }
    }

    /**
     * CLICK INTERCEPTION:
     * Handles left-clicks on logo/home links within the same tab.
     */
    function setupClickInterception() {
        document.addEventListener('click', function(e) {
            const anchor = e.target.closest('a');
            if (!anchor) return;

            try {
                const url = new URL(anchor.href);
                // Check if the link points to Bilibili homepage
                if (url.hostname === "www.bilibili.com" && (url.pathname === "/" || url.pathname === "/index.html")) {
                    e.preventDefault();
                    window.location.href = "https://t.bilibili.com/";
                }
                // Check if the link points to Zhihu homepage
                if (url.hostname === "www.zhihu.com" && url.pathname === "/") {
                    e.preventDefault();
                    window.location.href = "https://www.zhihu.com/follow";
                }
            } catch (err) {
                // Ignore invalid URLs
            }
        }, true);
    }

    // Execute immediately to handle direct access and "Open in new tab"
    performRedirect();

    // Initialize click listener after DOM begins to load
    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', setupClickInterception);
    } else {
        setupClickInterception();
    }

})();