<html>
<head>
<script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.5.1.min.js"></script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("p").toggle(1000);
});
});
</script>
</head>
<body>
<button>在 p 元素的隐藏和显示之间切换</button>
<p>这是一个段落。</p>
</body>
</html>