HTML id的实际最大长度是多少？ [英] What is a practical maximum length for HTML id?

问题描述

HTML规格说

ID和NAME令牌必须以字母（[A-Za-z]）开头，并且可以后跟任意数量的字母，数字（[ 0-9]），连字符（ - ），下划线（_），冒号（：）和句点（。）。

ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods (".").

即使 SGML声明的HTML 4使用值为65536的NAMELEN，它注意到避免固定的限制。

And even though the SGML declaration of HTML 4 uses the value 65536 for NAMELEN, it notes "Avoid fixed limits."

但肯定浏览器，CSS实现和JavaScript工具包必须有 >对它们支持的长度的限制。

But surely browsers, CSS implementations, and JavaScript toolkits must have some limits on the length they support. What is the smallest such limit that is safe to use in a HTML/CSS/JS application?

推荐答案

刚测试： 1M 个字符适用于所有现代浏览器：Chrome1，FF3，IE7，Konqueror3，Opera9和Safari3。

Just tested: 1M characters works on every modern browser: Chrome1, FF3, IE7, Konqueror3, Opera9, Safari3.

我怀疑更长的ID可能会变得难以记住。

I suspect even longer IDs could become hard to remember.

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