infinity scrolling init

src/blog/Blog.tsx

@@ -61,7 +61,14 @@ export default function Blog(props: { disableCustomTheme?: boolean }) {
         {selectedArticle === null ? (
           <>
             <MainContent articles={articles} onSelectArticle={handleSelectArticle} />
-            <Latest articles={articles.slice(0, 3)} /> {/* show 3 most recent */}
+            <Latest
+              articles={articles}
+              onSelectArticle={handleSelectArticle}
+              onLoadMore={async (offset, limit) => {
+                // Optional: fetch more from API (if you want true pagination)
+                // await fetchMoreArticles(offset, limit);
+              }}
+            />
           </>
         ) : (
           <Article article={articles[selectedArticle]} onBack={handleBack} />

src/blog/components/Latest.tsx

@@ -3,10 +3,10 @@ import Avatar from '@mui/material/Avatar';
 import AvatarGroup from '@mui/material/AvatarGroup';
 import Box from '@mui/material/Box';
 import Grid from '@mui/material/Grid';
-import Pagination from '@mui/material/Pagination';
 import Typography from '@mui/material/Typography';
 import { styled } from '@mui/material/styles';
 import NavigateNextRoundedIcon from '@mui/icons-material/NavigateNextRounded';
+import CircularProgress from '@mui/material/CircularProgress';
 import type { Article } from '../providers/Article'; // ✅ import type for correctness
 
 
@@ -92,19 +92,58 @@ function Author({ authors }: { authors: { name: string; avatar: string }[] }) {
 interface LatestProps {
   articles: Article[];
   onSelectArticle?: (index: number) => void;
+  onLoadMore?: (offset: number, limit: number) => Promise<void>; // optional async callback
 }
 
-export default function Latest({ articles, onSelectArticle }: LatestProps) {
-  const [focusedCardIndex, setFocusedCardIndex] = React.useState<number | null>(null);
+export default function Latest({ articles, onSelectArticle, onLoadMore }: LatestProps) {
+  const [visibleCount, setVisibleCount] = React.useState(2);
+  const [loadingMore, setLoadingMore] = React.useState(false);
 
-  const handleFocus = (index: number) => setFocusedCardIndex(index);
-  const handleBlur = () => setFocusedCardIndex(null);
+  const displayedArticles = articles.slice(0, visibleCount);
 
-  // limit to 4-6 items for visual balance
-  const displayedArticles = articles.slice(0, 6);
+  // Intersection Observer ref
+  const loaderRef = React.useRef<HTMLDivElement | null>(null);
+
+  React.useEffect(() => {
+    if (!loaderRef.current) return;
+
+    const observer = new IntersectionObserver(
+      async (entries) => {
+        const first = entries[0];
+        if (first.isIntersecting && !loadingMore && visibleCount < articles.length) {
+          console.log('🟡 Intersection triggered — loading more blogs...');
+          setLoadingMore(true);
+
+          if (onLoadMore) {
+            console.log(`📡 Calling onLoadMore(offset=${visibleCount}, limit=2)`);
+            await onLoadMore(visibleCount, 2);
+          }
+
+          setVisibleCount((prev) => {
+            const newCount = prev + 2;
+            console.log(`✅ Increasing visibleCount from ${prev} → ${newCount}`);
+            return newCount;
+          });
+
+          setLoadingMore(false);
+        }
+      },
+      { threshold: 0.5 }
+    );
+
+    const current = loaderRef.current;
+    observer.observe(current);
+
+    console.log('👀 IntersectionObserver attached to loaderRef:', loaderRef.current);
+
+    return () => {
+      if (current) observer.unobserve(current);
+      console.log('🧹 IntersectionObserver detached');
+    };
+  }, [loadingMore, visibleCount, articles.length, onLoadMore]);
 
   return (
-    <div>
+    <Box>
       <Typography variant="h2" gutterBottom>
         Latest
       </Typography>
@@ -128,17 +167,12 @@ export default function Latest({ articles, onSelectArticle }: LatestProps) {
                 gutterBottom
                 variant="h6"
                 tabIndex={0}
-                onFocus={() => handleFocus(index)}
-                onBlur={handleBlur}
                 onClick={() => onSelectArticle?.(index)}
-                className={focusedCardIndex === index ? 'Mui-focused' : ''}
               >
                 {article.title}
-                <NavigateNextRoundedIcon
-                  className="arrow"
-                  sx={{ fontSize: '1rem' }}
-                />
+                <NavigateNextRoundedIcon className="arrow" sx={{ fontSize: '1rem' }} />
               </TitleTypography>
+
               <StyledTypography variant="body2" color="text.secondary" gutterBottom>
                 {article.description}
               </StyledTypography>
@@ -148,9 +182,11 @@ export default function Latest({ articles, onSelectArticle }: LatestProps) {
           </Grid>
         ))}
       </Grid>
-      <Box sx={{ display: 'flex', flexDirection: 'row', pt: 4 }}>
-        <Pagination hidePrevButton hideNextButton count={10} boundaryCount={10} />
+
+      {/* Infinite scroll loader */}
+      <Box ref={loaderRef} sx={{ display: 'flex', justifyContent: 'center', py: 3 }}>
+        {loadingMore && <CircularProgress size={28} />}
       </Box>
-    </div>
+    </Box>
   );
 }