<html><head><script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.5.1.min.js"></script><script>$(document).ready(function(){ $("button").click(function(){ $("#p1").css("color", "red") .slideUp(2000) .slideDown(2000); });});</script></head><body><p id="p1">jQuery 很有趣！！</p><button>点击这里</button></body></html>