javascript HTML1527：应为 DOCTYPE。最短的有效文档类型是“<!DOCTYPE html>”
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HTML1527: DOCTYPE expected. The shortest valid doctype is "<!DOCTYPE html>"
提问by Panadol Chong
Good day,
再会，
I am working on a c# web application, everything is working until I add in a normal JavaScript.
我正在开发 ac# web 应用程序，一切正常，直到我添加了一个普通的 JavaScript。
The html code is something as follow:
html代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="scripts/JScript.js" type="text/javascript"></script>
<asp:ContentPlaceHolder id="headContent" runat="server">
</asp:ContentPlaceHolder>
</head>
<body>
<asp:ContentPlaceHolder id="title" runat="server"></asp:ContentPlaceHolder>
<asp:ContentPlaceHolder id="bodyContent" runat="server"></asp:ContentPlaceHolder>
<!-- some code here -->
</body>
The JScript.jsis the JavaScript that put in.
该JScript.js是把在JavaScript。
The JavaScript code is something as follow:
JavaScript 代码如下：
function getCookie(catId) {
var ebRand = Math.random() + '';
ebRand = ebRand * 1000000;
document.write('<scr' + 'ipt src="HTTP://bs.serving-sys.com/Serving/ActivityServer.bs?cn=as&ActivityID=553971&rnd=' + ebRand + '"></scr' + 'ipt>');
}
This JavaScript function will be trigger when a link button is click.
当点击链接按钮时，将触发此 JavaScript 函数。
I hit error in IE but Chrome and Mozilla is working fine.
我在 IE 中遇到错误，但 Chrome 和 Mozilla 工作正常。
My error in IE console is
HTML1527: DOCTYPE expected. The shortest valid doctype is "<!DOCTYPE html>".
我在 IE 控制台中的错误是
HTML1527: DOCTYPE expected. The shortest valid doctype is "<!DOCTYPE html>".
After search in Google, I try to put in
在谷歌搜索后，我尝试输入
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
as new DOCTYPE, but it not working also.
作为新的DOCTYPE，但它也不起作用。
and I have try put
我已经试过了
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
inside <head></head>
里面 <head></head>
But I still get the same error in IE also.
但是我在 IE 中仍然遇到同样的错误。
Is is problem in ContentPlaceHolder?
问题出在ContentPlaceHolder？
Other than that, I have go to W3C Markup Validation Service to do some validation of the address :
除此之外，我还去了 W3C 标记验证服务对地址进行了一些验证：
And go to http://validator.w3.org/checkto put in <script src="HTTP://bs.serving-sys.com/Serving/ActivityServer.bs?cn=as&ActivityID=553971&rnd=20079.082210606393"></script>as well.
并转到http://validator.w3.org/check进行输入<script src="HTTP://bs.serving-sys.com/Serving/ActivityServer.bs?cn=as&ActivityID=553971&rnd=20079.082210606393"></script>。
But not understand what is the validation result means.
但不明白验证结果是什么意思。
Kindly advise.
好心提醒。
回答by Jukka K. Korpela
IE issues a warningabout <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">, because such a string is not a valid doctype according to HTML5. The warning as such has no impact on anything. It's just part of HTML5 evangelism.
IE发出关于的警告<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">，因为根据 HTML5，这样的字符串不是有效的文档类型。这样的警告对任何事情都没有影响。这只是 HTML5 传播的一部分。
After you changed it to <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">, the issue was removed. But you probably saw the results of using some cached copy that has a wrong doctype. Testing with a fresh file (with a new name) should fix this issue.
将其更改为 后<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">，问题已消除。但是您可能看到了使用某些具有错误文档类型的缓存副本的结果。使用新文件（具有新名称）进行测试应该可以解决此问题。
Of course, the code as such does not validate, since the ASP tags are taken literally and interpreted as bodycontent, but that's a different issue.
当然，这样的代码不会验证，因为 ASP 标签是按字面意思理解的并被解释为body内容，但这是一个不同的问题。
The practical move is to use <!DOCTYPE html>as suggested. If you wish to still validate against the XHTML 1.0 specification for example, you can do this using the validator's user interface to override the doctype.
实际操作是<!DOCTYPE html>按照建议使用。例如，如果您仍希望根据 XHTML 1.0 规范进行验证，您可以使用验证器的用户界面覆盖文档类型来执行此操作。
But it's not a big issue; you can just as well simply ignore the warning. If you have some functionalerrors, they are caused by something else and should be asked separately, with sufficient data provided.
但这不是什么大问题；您也可以简单地忽略警告。如果您有一些功能错误，它们是由其他原因引起的，应该单独询问，并提供足够的数据。
