valknar/palina-theme
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feat: Implement infinite scroll with preloader

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This commit is contained in:
Sebastian Krüger
2026-02-17 19:07:11 +01:00
parent b0286ee5fe
commit 9a3b35b428
3 changed files with 120 additions and 9 deletions
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119
assets/js/main.js
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@@ -6,9 +6,9 @@ document.addEventListener('DOMContentLoaded', () => {
// Remove 'hidden' class from html to prevent FOUC
htmlElement.classList.remove('hidden');
// Staggered fade-in animation for post grid
const gridItems = document.querySelectorAll('.post-grid-item');
gridItems.forEach((item, index) => {
// Staggered fade-in animation for post grid (initial load)
const initialGridItems = document.querySelectorAll('.post-grid-item');
initialGridItems.forEach((item, index) => {
item.style.animationDelay = `${index * 100}ms`;
item.classList.add('animate-fadeInUp');
});
@@ -19,16 +19,18 @@ document.addEventListener('DOMContentLoaded', () => {
const lightboxImage = document.getElementById('lightbox-image');
const lightboxClose = document.getElementById('lightbox-close');
const images = document.querySelectorAll('.kg-image-card img, .post-content img');
images.forEach(image => {
const setupLightboxImage = (image) => {
image.style.cursor = 'pointer';
image.addEventListener('click', () => {
lightbox.classList.remove('hidden');
lightbox.classList.add('show');
lightboxImage.src = image.src;
});
});
};
// Initial setup for existing images
document.querySelectorAll('.kg-image-card img, .post-content img').forEach(setupLightboxImage);
lightboxClose.addEventListener('click', () => {
lightbox.classList.add('hidden');
@@ -90,4 +92,107 @@ document.addEventListener('DOMContentLoaded', () => {
});
});
}
// Infinite Scroll
const postsContainer = document.getElementById('posts-container');
const loadingSpinner = document.getElementById('loading-spinner');
if (postsContainer && loadingSpinner) {
let currentPage = 1;
let isLoading = false;
let hasMorePosts = true;
const ghostApiKeyMeta = document.querySelector('meta[name="ghost-api-key"]');
const ghostApiUrlMeta = document.querySelector('meta[name="ghost-api-url"]');
if (!ghostApiKeyMeta || !ghostApiUrlMeta) {
console.error('Ghost Content API Key or URL meta tag not found. Infinite scroll will not work.');
return;
}
const GHOST_API_KEY = ghostApiKeyMeta.content;
const GHOST_API_URL = ghostApiUrlMeta.content;
const fetchPosts = async () => {
if (isLoading || !hasMorePosts) return;
isLoading = true;
loadingSpinner.classList.remove('hidden');
currentPage++;
const postsPerPage = 12; // Matches posts_per_page in package.json config
const url = `${GHOST_API_URL}/ghost/api/content/posts/?key=${GHOST_API_KEY}&limit=${postsPerPage}&page=${currentPage}&include=tags,authors`;
try {
const response = await fetch(url);
const data = await response.json();
const newPosts = data.posts;
const pagination = data.meta.pagination;
if (newPosts.length > 0) {
newPosts.forEach((post, index) => {
const article = document.createElement('article');
article.className = 'post-grid-item opacity-0 relative bg-[var(--bg-secondary)] rounded-lg shadow-lg overflow-hidden group';
// Basic rendering of a post for infinite scroll.
// This should ideally match the structure in index.hbs
// For simplicity, I'm reconstructing it here.
article.innerHTML = `
<a href="${post.url}" class="block">
${post.feature_image ? `
<img
class="w-full h-72 object-cover transition-transform duration-300 ease-in-out group-hover:scale-105"
src="${post.feature_image}"
alt="${post.title}"
loading="lazy"
>
` : `
<div class="w-full h-72 flex items-center justify-center bg-[var(--bg-tertiary)] text-[var(--text-tertiary)] text-2xl">No Image</div>
`}
<div class="absolute inset-0 bg-black bg-opacity-50 flex items-end p-4 opacity-0 group-hover:opacity-100 transition-opacity duration-300 ease-in-out">
<h2 class="text-[var(--text-primary)] text-xl font-semibold leading-tight">${post.title}</h2>
</div>
</a>
`;
postsContainer.appendChild(article);
// Apply staggered animation to newly added posts
// Calculate delay based on total items
const totalItems = postsContainer.children.length;
article.style.animationDelay = `${(totalItems - newPosts.length + index) * 100}ms`;
article.classList.add('animate-fadeInUp');
// If lightbox is present, set up new images for lightbox
if (lightbox) {
article.querySelectorAll('.kg-image-card img, .post-content img').forEach(setupLightboxImage);
}
});
} else {
hasMorePosts = false;
}
if (pagination && pagination.next === null) {
hasMorePosts = false;
}
} catch (error) {
console.error('Error fetching posts:', error);
hasMorePosts = false; // Stop trying to fetch if there's an error
} finally {
isLoading = false;
loadingSpinner.classList.add('hidden');
}
};
const observer = new IntersectionObserver(entries => {
entries.forEach(entry => {
if (entry.isIntersecting && hasMorePosts && !isLoading) {
fetchPosts();
}
});
}, { threshold: 0.1 }); // Trigger when 10% of the spinner is visible
observer.observe(loadingSpinner);
}
});

2
default.hbs
View File

@@ -6,6 +6,8 @@
<title>{{meta_title}}</title>
<link rel="stylesheet" href="{{asset "built/screen.css"}}">
<link href="https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700&family=Playfair+Display:wght@700&display=swap" rel="stylesheet">
<meta name="ghost-api-key" content="YOUR_GHOST_CONTENT_API_KEY"> <!-- IMPORTANT: Replace with your actual Ghost Content API Key -->
<meta name="ghost-api-url" content="{{@site.url}}">
{{ghost_head}}
</head>
<body class="{{body_class}} font-sans antialiased">

8
index.hbs
View File

@@ -7,7 +7,7 @@
<div class="container mx-auto px-4">
{{#if posts}}
<div class="grid grid-cols-1 sm:grid-cols-2 md:grid-cols-3 lg:grid-cols-4 gap-6">
<div id="posts-container" class="grid grid-cols-1 sm:grid-cols-2 md:grid-cols-3 lg:grid-cols-4 gap-6">
{{#foreach posts}}
<article class="post-grid-item opacity-0 relative bg-[var(--bg-secondary)] rounded-lg shadow-lg overflow-hidden group">
<a href="{{url}}" class="block">
@@ -34,7 +34,11 @@
{{/foreach}}
</div>
{{pagination}}
<div id="loading-spinner" class="text-center py-8 hidden">
<div class="inline-block animate-spin rounded-full h-8 w-8 border-4 border-[var(--brand-primary)] border-t-transparent"></div>
<p class="text-[var(--text-secondary)] mt-2">Loading more posts...</p>
</div>
{{else}}
<p class="text-center text-[var(--text-secondary)] text-2xl py-20">No posts found.</p>
{{/if}}