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编辑您的代码：
<html> <head> <script type="text/javascript" src="../jquery/jquery.js"></script> <script type="text/javascript"> $(document).ready(function(){ $("#btn1").click(function(){ $("div").data("greeting", "Hello World"); alert("Greeting is: " + $("div").data("greeting")); }); $("#btn2").click(function(){ $("div").removeData("greeting"); alert("Greeting is: " + $("div").data("greeting")); }); }); </script> </head> <body> <button id="btn1">向 div 元素添加数据</button><br /> <button id="btn2">从 div 元素删除数据</button> <div></div> </body> </html>
查看结果: