345 lines
7.4 KiB
Plaintext
345 lines
7.4 KiB
Plaintext
---
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interface Heading {
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depth: number;
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slug: string;
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text: string;
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}
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interface Props {
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headings: Heading[];
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}
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const { headings } = Astro.props;
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// 过滤出 h2 和 h3 标题
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const tocItems = headings.filter(h => h.depth >= 2 && h.depth <= 3);
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---
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<!-- 移动端悬浮按钮 -->
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<button
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id="toc-toggle"
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class="toc-toggle xl:hidden"
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aria-label="切换目录"
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type="button"
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>
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<svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
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<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 6h16M4 12h16M4 18h7" />
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</svg>
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<span class="ml-1 text-sm font-medium">目录</span>
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</button>
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<!-- 移动端遮罩层 -->
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<div id="toc-overlay" class="toc-overlay xl:hidden"></div>
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<!-- 目录导航 -->
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<nav id="toc-nav" class="toc-nav" aria-label="文章目录">
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<div class="toc-header">
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<span class="text-sm font-semibold text-foreground">目录</span>
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<button id="toc-close" class="toc-close xl:hidden" aria-label="关闭目录" type="button">
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<svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
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<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
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</svg>
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</button>
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</div>
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<ul class="toc-list">
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{tocItems.map((heading) => (
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<li class={`toc-item toc-depth-${heading.depth}`}>
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<a
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href={`#${heading.slug}`}
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class="toc-link"
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data-heading-slug={heading.slug}
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>
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{heading.text}
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</a>
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</li>
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))}
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</ul>
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</nav>
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<style>
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/* 移动端悬浮按钮 */
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.toc-toggle {
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position: fixed;
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bottom: 1.5rem;
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right: 1.5rem;
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z-index: 40;
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display: flex;
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align-items: center;
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padding: 0.75rem 1rem;
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background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
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color: white;
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border: none;
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border-radius: 9999px;
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box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
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cursor: pointer;
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transition: all 0.2s ease;
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}
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.toc-toggle:hover {
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transform: translateY(-2px);
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box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
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}
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.toc-toggle:active {
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transform: translateY(0);
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}
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/* 目录导航 - 移动端默认隐藏在右侧 */
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.toc-nav {
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position: fixed;
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top: 0;
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right: 0;
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width: 16rem;
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height: 100vh;
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background: var(--color-background);
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border-left: 1px solid var(--color-border);
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padding: 1.5rem;
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z-index: 50;
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box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
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transform: translateX(100%);
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transition: transform 0.3s ease;
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overflow-y: auto;
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}
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.toc-nav.open {
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transform: translateX(0);
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}
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/* 桌面端 - 右侧 sticky 侧边栏 */
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@media (min-width: 1280px) {
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.toc-toggle {
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display: none;
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}
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.toc-nav {
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position: sticky;
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top: 6rem;
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right: auto;
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width: 12rem;
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height: auto;
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max-height: calc(100vh - 8rem);
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border: none;
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background: transparent;
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box-shadow: none;
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padding: 0;
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transform: none;
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overflow-y: auto;
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}
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.toc-close {
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display: none;
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}
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}
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/* 目录头部 */
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.toc-header {
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display: flex;
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justify-content: space-between;
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align-items: center;
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margin-bottom: 1rem;
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padding-bottom: 0.75rem;
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border-bottom: 1px solid var(--color-border);
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}
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@media (min-width: 1280px) {
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.toc-header {
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border-bottom: none;
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padding-bottom: 0;
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margin-bottom: 0.75rem;
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}
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}
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.toc-close {
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padding: 0.25rem;
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color: var(--color-muted-foreground);
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background: transparent;
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border: none;
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cursor: pointer;
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border-radius: 0.25rem;
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transition: all 0.2s;
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}
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.toc-close:hover {
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color: var(--color-foreground);
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background: var(--color-muted);
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}
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/* 目录列表 */
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.toc-list {
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list-style: none;
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padding: 0;
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margin: 0;
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}
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.toc-item {
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margin: 0;
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}
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.toc-link {
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display: block;
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padding: 0.5rem 0.75rem;
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font-size: 0.8125rem;
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line-height: 1.4;
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color: var(--color-muted-foreground);
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text-decoration: none;
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border-radius: 0.375rem;
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border-left: 2px solid transparent;
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transition: all 0.15s ease;
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}
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.toc-link:hover {
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color: var(--color-foreground);
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background: var(--color-muted);
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}
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.toc-link.active {
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color: var(--color-primary-500);
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border-left-color: var(--color-primary-500);
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background: rgba(59, 130, 246, 0.1);
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font-weight: 500;
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}
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/* 缩进层级 */
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.toc-depth-3 {
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padding-left: 0.5rem;
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}
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.toc-depth-3 .toc-link {
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font-size: 0.75rem;
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padding-left: 1rem;
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}
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/* 遮罩层 */
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.toc-overlay {
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position: fixed;
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inset: 0;
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background: rgba(0, 0, 0, 0.5);
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z-index: 45;
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opacity: 0;
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pointer-events: none;
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transition: opacity 0.3s ease;
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}
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.toc-overlay.open {
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opacity: 1;
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pointer-events: auto;
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}
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@media (min-width: 1280px) {
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.toc-overlay {
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display: none;
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}
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}
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/* 滚动条样式 */
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.toc-nav::-webkit-scrollbar {
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width: 4px;
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}
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.toc-nav::-webkit-scrollbar-track {
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background: transparent;
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}
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.toc-nav::-webkit-scrollbar-thumb {
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background: var(--color-border);
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border-radius: 2px;
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}
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.toc-nav::-webkit-scrollbar-thumb:hover {
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background: var(--color-muted-foreground);
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}
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</style>
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<script>
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// DOM 元素
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const tocToggle = document.getElementById('toc-toggle');
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const tocNav = document.getElementById('toc-nav');
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const tocClose = document.getElementById('toc-close');
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const tocOverlay = document.getElementById('toc-overlay');
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const tocLinks = document.querySelectorAll('.toc-link');
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// 切换目录显示
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function openToc() {
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tocNav?.classList.add('open');
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tocOverlay?.classList.add('open');
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document.body.style.overflow = 'hidden';
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}
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function closeToc() {
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tocNav?.classList.remove('open');
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tocOverlay?.classList.remove('open');
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document.body.style.overflow = '';
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}
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// 绑定事件
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tocToggle?.addEventListener('click', (e) => {
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e.preventDefault();
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e.stopPropagation();
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if (tocNav?.classList.contains('open')) {
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closeToc();
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} else {
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openToc();
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}
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});
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tocClose?.addEventListener('click', (e) => {
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e.preventDefault();
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e.stopPropagation();
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closeToc();
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});
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tocOverlay?.addEventListener('click', closeToc);
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// 点击链接后关闭目录（移动端）
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tocLinks.forEach(link => {
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link.addEventListener('click', () => {
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if (window.innerWidth < 1280) {
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closeToc();
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}
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});
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});
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// 监听窗口大小变化
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window.addEventListener('resize', () => {
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if (window.innerWidth >= 1280) {
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closeToc();
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}
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});
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// ESC 键关闭
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document.addEventListener('keydown', (e) => {
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if (e.key === 'Escape') {
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closeToc();
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}
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});
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// 滚动高亮当前标题
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const headings = document.querySelectorAll('article h2[id], article h3[id]');
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const observerOptions = {
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rootMargin: '-80px 0px -70% 0px',
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threshold: 0
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};
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const observer = new IntersectionObserver((entries) => {
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entries.forEach(entry => {
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if (entry.isIntersecting) {
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const id = entry.target.id;
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tocLinks.forEach(link => {
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link.classList.remove('active');
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if (link instanceof HTMLAnchorElement) {
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const slug = link.getAttribute('data-heading-slug');
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if (slug === id) {
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link.classList.add('active');
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}
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}
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});
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}
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});
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}, observerOptions);
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headings.forEach(heading => {
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observer.observe(heading);
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});
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</script> |