Speed up top nav with turbo routing and external base CSS.
Remove view-transition lag, swap main content without full reload, prefetch pages, and tear down SSE timers on leave. Co-authored-by: Cursor <cursoragent@cursor.com>
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dekun
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/* Copyright (c) 2025-2026 马建军. All rights reserved.
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* 专有软件 — 未经授权禁止复制、传播、转售。
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* 详见 LICENSE.zh-CN.txt
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*/
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(function () {
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var PERMANENT_CSS = ['/static/css/base.css', '/static/css/tech.css', '/static/css/responsive.css'];
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var CORE_SCRIPT_MARKERS = ['theme.js', 'symbol.js', 'page.js', 'nav.js', 'pwa.js', 'turbonav.js'];
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var pageCache = new Map();
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var MAX_CACHE = 10;
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var inflight = null;
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var currentUrl = normalizeUrl(window.location.href);
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function normalizeUrl(href) {
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var u = new URL(href, window.location.origin);
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u.hash = '';
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return u.href;
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}
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function isPermanentStylesheet(el) {
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var href = el.getAttribute('href') || '';
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return PERMANENT_CSS.some(function (p) { return href.indexOf(p) !== -1; });
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}
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function isCoreScript(el) {
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var src = el.getAttribute('src') || '';
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if (!src) return false;
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return CORE_SCRIPT_MARKERS.some(function (m) { return src.indexOf(m) !== -1; });
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}
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function shouldTurboClick(e, link) {
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if (!link || !link.href) return false;
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if (e.defaultPrevented) return false;
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if (e.button !== 0 || e.metaKey || e.ctrlKey || e.shiftKey || e.altKey) return false;
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if (link.target && link.target !== '_self') return false;
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if (link.hasAttribute('download')) return false;
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if (link.origin !== window.location.origin) return false;
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if (normalizeUrl(link.href) === currentUrl) return false;
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return true;
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}
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function parseHtml(html) {
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return new DOMParser().parseFromString(html, 'text/html');
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}
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function fetchPage(url, signal) {
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var key = normalizeUrl(url);
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if (pageCache.has(key)) {
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return Promise.resolve(pageCache.get(key));
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}
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return fetch(key, {
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credentials: 'same-origin',
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headers: { Accept: 'text/html' },
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signal: signal
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}).then(function (res) {
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if (!res.ok) throw new Error('HTTP ' + res.status);
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return res.text();
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}).then(function (html) {
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var doc = parseHtml(html);
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pageCache.set(key, doc);
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if (pageCache.size > MAX_CACHE) {
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var first = pageCache.keys().next().value;
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pageCache.delete(first);
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}
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return doc;
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});
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}
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function collectPageCss(doc) {
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var out = [];
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doc.querySelectorAll('head link[rel="stylesheet"], head style').forEach(function (el) {
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if (el.tagName === 'LINK' && isPermanentStylesheet(el)) return;
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out.push(el);
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});
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return out;
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}
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function collectPageScripts(doc) {
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var out = [];
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var pastCore = false;
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doc.body.querySelectorAll(':scope > script').forEach(function (el) {
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if (isCoreScript(el)) {
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if ((el.getAttribute('src') || '').indexOf('pwa.js') !== -1) pastCore = true;
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return;
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}
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if (!pastCore) return;
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out.push(el);
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});
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return out;
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}
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function removePageAssets() {
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document.querySelectorAll('head link[rel="stylesheet"]').forEach(function (el) {
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if (!isPermanentStylesheet(el)) el.remove();
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});
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document.querySelectorAll('head style').forEach(function (el) { el.remove(); });
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document.querySelectorAll('body script[data-page-js]').forEach(function (el) { el.remove(); });
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}
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function applyPageCss(items) {
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items.forEach(function (srcEl) {
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var el = srcEl.cloneNode(true);
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if (el.tagName === 'LINK') {
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el.setAttribute('data-page-css', '');
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} else {
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el.setAttribute('data-page-css', '');
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}
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document.head.appendChild(el);
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});
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}
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function runPageScripts(items) {
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return items.reduce(function (chain, srcEl) {
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return chain.then(function () {
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return new Promise(function (resolve) {
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var s = document.createElement('script');
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s.setAttribute('data-page-js', '');
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var src = srcEl.getAttribute('src');
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if (src) {
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var bust = (src.indexOf('?') >= 0 ? '&' : '?') + '_turbo=' + Date.now();
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s.src = src + bust;
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s.async = false;
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s.onload = function () { resolve(); };
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s.onerror = function () { resolve(); };
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document.body.appendChild(s);
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} else {
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s.textContent = srcEl.textContent;
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document.body.appendChild(s);
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resolve();
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}
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});
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});
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}, Promise.resolve());
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}
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function syncNavActive(doc, url) {
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var nav = document.getElementById('site-nav');
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var fetchedNav = doc.getElementById('site-nav');
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if (!nav || !fetchedNav) return;
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nav.querySelectorAll('a.active').forEach(function (a) { a.classList.remove('active'); });
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fetchedNav.querySelectorAll('a[href].active').forEach(function (fa) {
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var href = fa.getAttribute('href');
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if (!href) return;
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var local = nav.querySelector('a[href="' + href + '"]')
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|| nav.querySelector('a[href="' + new URL(href, window.location.origin).pathname + '"]');
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if (local) local.classList.add('active');
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});
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}
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function setLoading(on) {
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var main = document.querySelector('.main');
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if (main) main.classList.toggle('nav-loading', on);
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}
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function applyDocument(doc, url, fromPopstate) {
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var main = document.querySelector('.main');
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var fetchedMain = doc.querySelector('.main');
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if (!main || !fetchedMain) {
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window.location.href = url;
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return Promise.resolve();
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}
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window.dispatchEvent(new Event('qihuo:page-leave'));
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removePageAssets();
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applyPageCss(collectPageCss(doc));
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main.innerHTML = fetchedMain.innerHTML;
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document.title = doc.title || document.title;
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syncNavActive(doc, url);
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return runPageScripts(collectPageScripts(doc)).then(function () {
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currentUrl = normalizeUrl(url);
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if (!fromPopstate) {
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history.pushState({ turbo: true }, '', currentUrl);
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}
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setLoading(false);
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window.scrollTo(0, 0);
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if (window.qihuoEmitPageLoad) window.qihuoEmitPageLoad();
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});
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}
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function navigateTo(url, opts) {
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opts = opts || {};
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var target = normalizeUrl(url);
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if (target === currentUrl && !opts.force) return Promise.resolve();
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if (inflight) inflight.abort();
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var ctrl = new AbortController();
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inflight = ctrl;
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setLoading(true);
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return fetchPage(target, ctrl.signal).then(function (doc) {
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if (ctrl.signal.aborted) return;
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inflight = null;
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applyDocument(doc, target, !!opts.fromPopstate);
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}).catch(function (err) {
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if (ctrl.signal.aborted) return;
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inflight = null;
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setLoading(false);
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window.location.href = target;
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});
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}
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function prefetchPage(href) {
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var target = normalizeUrl(href);
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if (target === currentUrl || pageCache.has(target)) return;
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fetchPage(target).catch(function () { /* ignore */ });
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}
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window.qihuoNavigate = navigateTo;
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window.qihuoPrefetchPage = prefetchPage;
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document.addEventListener('click', function (e) {
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var link = e.target.closest('#site-nav a[href]');
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if (!link || !shouldTurboClick(e, link)) return;
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e.preventDefault();
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var navEl = document.getElementById('site-nav');
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if (navEl) {
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navEl.querySelectorAll('a.active').forEach(function (a) { a.classList.remove('active'); });
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link.classList.add('active');
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}
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navigateTo(link.href);
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}, true);
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window.addEventListener('popstate', function () {
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var target = normalizeUrl(window.location.href);
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if (target === currentUrl) return;
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navigateTo(target, { fromPopstate: true, force: true });
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});
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if (window.qihuoEmitPageLoad) window.qihuoEmitPageLoad();
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})();
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