菜鸟教程在线编辑器

AI 编程工具
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title> 
<style>
h1 {letter-spacing:2px;}
h2 {letter-spacing:-3px;}
</style>
</head>

<body>
<h1>This is heading 1</h1>
<h2>This is heading 2</h2>
</body>
</html>
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title> 
<style>
h1 {letter-spacing:2px;}
h2 {letter-spacing:-3px;}
</style>
</head>
​
<body>
<h1>This is heading 1</h1>
<h2>This is heading 2</h2>
</body>
</html>