Infinite Scroll

Question

Load more items as the user scrolls to the bottom.

Accepted Answer

import './index.css'; import React, { useState, useRef, useEffect } from 'react'; function App() { const [items, setItems] = useState(Array.from({ length: 20 }, (_, i) => 'Item ' + (i + 1))); const loader = useRef(); useEffect(() => { const obs = new window.IntersectionObserver(([entry]) => { if (entry.isIntersecting) { setItems(items => items.concat(Array.from({ length: 10 }, (_, i) => 'Item ' + (items.length + i + 1)))); } }); if (loader.current) obs.observe(loader.current); return () => obs.disconnect(); }, []); return (

Infinite Scroll

{item}

Loading...

); } export default App; body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif; background-color: #f5f5f5; } * { box-sizing: border-box; } .inf-list { max-width: 400px; margin: 60px auto; background: #fff; border-radius: 12px; box-shadow: 0 2px 16px rgba(0,0,0,0.08); padding: 32px 24px; } .inf-title { font-size: 1.5rem; font-weight: bold; margin-bottom: 1.5rem; color: #1f2937; } .inf-ul { list-style: none; padding: 0; } .inf-li { padding: 0.7rem 1.2rem; background: #f1f5f9; border-radius: 8px; margin-bottom: 0.5rem; border: 1px solid #e5e7eb; } .inf-loader { text-align: center; color: #2563eb; margin-top: 1rem; }