React list and keys
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<!DOCTYPE html> <html> <head> <meta charset="UTF-8" /> <title>React list and keys</title> <script src="https://unpkg.com/react@16/umd/react.development.js"></script> <script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script> <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script> </head> <body> <div id="root"></div> <script type="text/babel"> function Tutorial(props) { const sidebar = ( <ul> {props.posts.map((post) => <li key={post.id}> {post.title} </li> )} </ul> ); const content = props.posts.map((post) => <div key={post.id}> <h2>{post.title}</h2> <p>{post.content}</p> </div> ); return ( <div> {sidebar} <hr /> {content} </div> ); }; const posts = [ {id: 1, title: 'Học Javascript', content: 'Chào mừng bạn đền Javascript!'}, {id: 2, title: 'Học React.js', content: 'Bạn có thể bắt đầu học React.js sau khi cài đặt.'} ]; ReactDOM.render( <Tutorial posts={posts} />, document.getElementById('root') ); </script> </body> </html>
