源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>编程字典</title> <script>document.createElement("myHero")</script> <style> myHero { display: block; background-color: #dddddd; padding: 50px; font-size: 30px; } </style> </head> <body> <h1>一个标题</h1> <myHero>我的英雄元素</myHero> </body> </html>
运行结果