W3School TIY
编辑您的代码：
<!DOCTYPE html> <html> <head> <title>Styling the article element</title> <script>document.createElement("myHero")</script> <style> myHero { display:block; background-color:#ddd; padding: 50px; font-size: 30px; } </style> </head> <body> <h1>My First Heading</h1> <p>My first paragraph.</p> <myHero>My First Hero</myHero> </body> </html>
查看结果: