<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<!-- 写一段js代码 -->
<script>
// 一段逻辑
function surprise(){
alert("hello 我是惊喜！")
}
</script>
</head>
<body>
<!-- onclick是点击按钮触发的事件 -->
<button onclick="surprise()">点我点我点我</button>
</body>
</html>