1.模板
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
</body>
</html>
2.点击
<button onclick="alert(‘test‘);">1.</button>
<a href="javascript:alert(‘test‘);">2.</a>
<a href="javascript:;">2.</a>
原文：https://www.cnblogs.com/amize/p/14259591.html