Chrome 是否使用 XPath 2.0? [英] Does Chrome use XPath 2.0?

问题描述

我的印象是所有最新的浏览器现在都使用 XPath 2.当我使用 lower-case() 和 uppser-case() (版本 2 中引入的函数)时，Chrome 会引发语法错误.但是，他们较旧的替代 translate() 工作正常.

I was under impression that all latest browsers are with XPath 2 now. When I use lower-case() and uppser-case() (functions introduced in version 2) Chrome throws a syntax error. However, their older alternative translate() works fine.

这是一个错误还是最新的 Chrome 确实使用了 XPath 1?有没有找到 XPath 版本的命令/方法?

Is this a bug or does the latest Chrome actually use XPath 1? Is there a command / way to find out the XPath version?

// Finds the element as expected.
$x('//h2/text()[. = "Delete"]') 

// Doesn't find the element (also expected).
$x('//h2/text()[. = "delete"]') 

// SyntaxError: Failed to execute 'evaluate' on 'Document': The string '//h2/text()[lower-case(.) = "delete"]' is not a valid XPath expression.
$x('//h2/text()[lower-case(.) = "delete"]')

推荐答案

不，Chrome 使用 XPath 1.0.

您可以将 XPath 表达式简化为 v2.0 函数来查看:

You can simplify your XPath expression to just a v2.0 function to see this:

$x("lower-case('ABC')")
SyntaxError: Failed to execute 'evaluate' on 'Document': The string 'lower-case('ABC')' is not a valid XPath expression.

尝试任何其他 XPath 2.0 函数，例如 current-date() 都会产生类似的错误.

Trying any other XPath 2.0 function such as current-date() will yield a similar error.

除了此类探测之外，没有内置方法可以明确确定 XPath 实现的版本.

另一方面，XSLT 有 system-property('xsl:version') 用于确定版本 1.0 还是 2.0.

XSLT, on the other hand, has system-property('xsl:version') for determining version 1.0 versus 2.0.

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