qing
546b19aece
- index.html: 品牌树 SVG 扩展为 4 层节点，新增径向渐变光晕底衬； About 面板新增同心圆装饰 SVG；CTA 树水印重绘为紧凑 7 节点版本 - css/index.css: 统一渐变方向为 135deg；光晕/点阵透明度更克制； 卡片 hover 阴影更柔和；树动画幅度降低周期放慢；间距节奏统一 - js/index.js: IntersectionObserver 选择器适配新 section 命名
104 lines
3.8 KiB
JavaScript
104 lines
3.8 KiB
JavaScript
/* index.js — 社区首页逻辑
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*
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* 登录态检测：POST /whoami（HttpOnly q4_token Cookie 自动携带，JS 不经手 Token）
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* 已登录：显示头像/用户名与"进入笔记/退出"按钮，首屏 CTA 指向笔记页
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* 未登录：显示"登录/注册"，首屏 CTA 指向登录页
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*/
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(function () {
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'use strict';
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const nameEl = document.getElementById('name');
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const avatarEl = document.getElementById('avatar');
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const enterBtn = document.getElementById('enterBtn');
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const logoutBtn = document.getElementById('logoutBtn');
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const loginBtn = document.getElementById('loginBtn');
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const registerBtn = document.getElementById('registerBtn');
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const ctaBtns = document.querySelectorAll('[data-cta]'); // 首屏与页尾 CTA 按钮
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const logoEl = document.getElementById('logo');
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let loggedIn = false;
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function go(url) { window.location.href = url; }
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logoEl.addEventListener('click', () => go('index.html'));
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enterBtn.addEventListener('click', () => go('dnfs.html'));
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loginBtn.addEventListener('click', () => go('login.html'));
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registerBtn.addEventListener('click', () => go('register.html'));
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ctaBtns.forEach(function (btn) {
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btn.addEventListener('click', () => go(loggedIn ? 'dnfs.html' : 'login.html'));
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});
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async function checkLogin() {
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try {
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const res = await fetch('/whoami', { method: 'POST' });
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if (!res.ok) return;
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const data = await res.json();
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if (data && data.login && data.user) {
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loggedIn = true;
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nameEl.textContent = String(data.user);
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nameEl.style.display = '';
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avatarEl.style.display = '';
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enterBtn.style.display = '';
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logoutBtn.style.display = '';
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loginBtn.style.display = 'none';
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registerBtn.style.display = 'none';
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ctaBtns.forEach(function (btn) { btn.textContent = '进入我的知识树'; });
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}
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} catch (e) {
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console.warn('index: 登录态检测失败', e.message);
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}
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}
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logoutBtn.addEventListener('click', async function () {
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try {
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await fetch('/logout', { method: 'POST' });
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} catch (e) {
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console.warn('index: 退出登录请求异常', e.message);
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}
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location.reload();
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});
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checkLogin();
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})();
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/* ===== 视觉增强：滚动渐显 + 卡片光标光斑（装饰性，与登录逻辑解耦） ===== */
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(function () {
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'use strict';
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const reduceMotion = !window.matchMedia('(prefers-reduced-motion: no-preference)').matches;
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/* 滚动进入视口渐显：由 JS 添加 .reveal 隐藏初始态，无 JS / 减弱动效时内容天然可见 */
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if (!reduceMotion && 'IntersectionObserver' in window) {
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const targets = document.querySelectorAll('.section-eyebrow, .section-title, .section-sub, .feature-card, .site-intro, .about-stats, .quick-links, .cta-band');
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targets.forEach(function (el, i) {
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el.classList.add('reveal');
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el.style.transitionDelay = (i % 4) * 70 + 'ms';
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});
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const io = new IntersectionObserver(function (entries) {
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entries.forEach(function (entry) {
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if (!entry.isIntersecting) return;
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const el = entry.target;
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el.classList.add('reveal-in');
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io.unobserve(el);
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/* 动画结束后移除类与延迟，把 transition 控制权交还 hover 等交互样式 */
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setTimeout(function () {
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el.classList.remove('reveal', 'reveal-in');
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el.style.transitionDelay = '';
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}, 900);
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});
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}, { threshold: 0.15, rootMargin: '0px 0px -8% 0px' });
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targets.forEach(function (el) { io.observe(el); });
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}
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/* 特性卡片光标光斑：鼠标位置写入 CSS 变量，由 index.css 径向渐变消费（仅精确指针设备） */
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if (window.matchMedia('(hover: hover) and (pointer: fine)').matches) {
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document.querySelectorAll('.feature-card').forEach(function (card) {
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card.addEventListener('mousemove', function (e) {
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const rect = card.getBoundingClientRect();
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card.style.setProperty('--mx', (e.clientX - rect.left) + 'px');
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card.style.setProperty('--my', (e.clientY - rect.top) + 'px');
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});
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});
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}
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})();
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