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class BreadcrumbNav {

constructor() {

this.breadcrumbs = [];

this.init();

}

init() {

this.generateBreadcrumbs();

this.renderBreadcrumb();

}

generateBreadcrumbs() {

const path = window.location.pathname;

const parts = path.split('/').filter((part) => part);

this.breadcrumbs = [{ name: '首页', url: '/index.html', icon: 'fa-home' }];

const pathMap = {

blog: { name: '博客', url: '/blog/', icon: 'fa-blog' },

'nav.html': { name: '网址导航', url: '/nav.html', icon: 'fa-compass' },

'book.html': { name: '图书推荐', url: '/book.html', icon: 'fa-book' },

'about.html': { name: '关于我', url: '/about.html', icon: 'fa-user' },

'contact.html': { name: '联系我', url: '/contact.html', icon: 'fa-envelope' },

wiki: { name: 'Wiki', url: '/wiki/index.html', icon: 'fa-book-open' },

tutorials: { name: '教程', url: '/tutorials/index.html', icon: 'fa-graduation-cap' },

note: { name: '笔记', url: '/note/', icon: 'fa-sticky-note' },

};

parts.forEach((part, index) => {

if (pathMap[part]) {

this.breadcrumbs.push(pathMap[part]);

} else if (part.endsWith('.html')) {

const title =

document

.querySelector('h1, .post-title, .article-title')

?.textContent?.trim() || part;

this.breadcrumbs.push({

name: title,

url: path,

icon: 'fa-file-alt',

isCurrent: true,

});

} else if (index === parts.length - 1 && !part.endsWith('.html')) {

this.breadcrumbs.push({

name: part.charAt(0).toUpperCase() + part.slice(1),

url: path,

icon: 'fa-folder',

isCurrent: true,

});

}

});

}

renderBreadcrumb() {

if (this.breadcrumbs.length <= 1) return;

const breadcrumbContainer = document.createElement('nav');

breadcrumbContainer.className = 'breadcrumb-nav';

breadcrumbContainer.setAttribute('aria-label', '面包屑导航');

breadcrumbContainer.innerHTML = `

<ol class="breadcrumb-list">

${this.breadcrumbs

.map(

(item, index) => `

<li class="breadcrumb-item ${item.isCurrent ? 'current' : ''}">

${

index < this.breadcrumbs.length - 1

? `

<a href="${item.url}" class="breadcrumb-link">

${item.icon ? `<i class="fas ${item.icon}"></i>` : ''}

<span>${item.name}</span>

</a>

<i class="fas fa-chevron-right breadcrumb-separator"></i>

`

: `

<span class="breadcrumb-current">

${item.icon ? `<i class="fas ${item.icon}"></i>` : ''}

<span>${item.name}</span>

</span>

`

}

</li>

`

)

.join('')}

</ol>

`;

const mainContent =

document.querySelector('main') || document.querySelector('.container') || document.body;

mainContent.insertBefore(breadcrumbContainer, mainContent.firstChild);

this.addBreadcrumbStyles();

}

addBreadcrumbStyles() {

const style = document.createElement('style');

style.textContent = `

.breadcrumb-nav {

background: var(--bg-secondary-color);

padding: 12px 24px;

border-radius: 8px;

margin-bottom: 24px;

overflow-x: auto;

}

.breadcrumb-list {

display: flex;

align-items: center;

list-style: none;

margin: 0;

padding: 0;

gap: 8px;

flex-wrap: wrap;

}

.breadcrumb-item {

display: flex;

align-items: center;

gap: 8px;

}

.breadcrumb-link {

color: var(--text-secondary-color);

text-decoration: none;

font-size: 14px;

display: flex;

align-items: center;

gap: 6px;

transition: color 0.2s;

}

.breadcrumb-link:hover {

color: var(--primary-color);

}

.breadcrumb-link i {

font-size: 12px;

}

.breadcrumb-separator {

color: var(--text-muted-color);

font-size: 10px;

margin: 0 4px;

}

.breadcrumb-current {

color: var(--text-color);

font-size: 14px;

font-weight: 500;

display: flex;

align-items: center;

gap: 6px;

}

.breadcrumb-current i {

font-size: 12px;

}

.breadcrumb-item.current {

pointer-events: none;

}

.dark-mode .breadcrumb-nav {

background: #374151;

}

.dark-mode .breadcrumb-link {

color: #9ca3af;

}

.dark-mode .breadcrumb-link:hover {

color: #60a5fa;

}

.dark-mode .breadcrumb-separator {

color: #6b7280;

}

.dark-mode .breadcrumb-current {

color: #f9fafb;

}

.eye-care-mode .breadcrumb-nav {

background: #e8f5e9;

}

.eye-care-mode .breadcrumb-link {

color: #558b2f;

}

.eye-care-mode .breadcrumb-link:hover {

color: #2e7d32;

}

@media (max-width: 768px) {

.breadcrumb-nav {

padding: 10px 16px;

margin-bottom: 16px;

}

.breadcrumb-link span,

.breadcrumb-current span {

font-size: 13px;

}

.breadcrumb-list {

gap: 6px;

}

}

`;

document.head.appendChild(style);

}

}

const breadcrumbNav = new BreadcrumbNav();

if (typeof module !== 'undefined' && module.exports) {

module.exports = BreadcrumbNav;

}