我用瀏覽器測試為什么沒有輸出？在慕課的網頁編輯器就可以？
<style type="text/css">
.message{? ??
width:200px;
height:100px;
background-color:#CCC;}
</style>
</head>
<body>
<script type="text/javascript">
var p = document.createElement("p");
p.className = "message";
var text = document.createTextNode("I love JavaScript");
p.appendChild(text);
document.body.appendChild(p);
</script>?
</body>
2018-12-20
寫的沒問題，多提交幾次，應該是檢測錯誤
2018-12-13
<!DOCTYPE?html> <html> <head> ????<style?type="text/css"> ????????.message{ ????????????width:200px; ????????????height:100px; ????????????background-color:#CCC;} ????</style> </head> <body> <script?type="text/javascript"> ????var?p?=?document.createElement("p"); ????p.className?=?"message"; ????var?text?=?document.createTextNode("I?love?JavaScript"); ????p.appendChild(text); ????document.body.appendChild(p); </script> </body> </html>放在瀏覽器里有輸出，你是不是head標簽沒粘貼全呀