使用XPath之后:中提取内容 [英] Extracting content in :after using XPath

问题描述

我试图通过以下方式获取CSS属性"content"的值:

I am trying to get the value of a CSS attribute "content" with:

WebElement plusOrMinusSign = currentEntityTypeLevel1.findElement(
    By.xpath("i[@class='tree-branch-head']::after"));
System.out.println(plusOrMinusSign.getCssValue("content"));

但是，我收到一个错误:The string 'i[@class='tree-branch-head']::after' is not a valid XPath expression.

However, I get an error: The string 'i[@class='tree-branch-head']::after' is not a valid XPath expression.

似乎无法识别"::after".

HTML:

<i class="tree-branch-head" ng-class="iBranchClass()" ng-click="selectNodeHead(node)">::after
</i>

Css:

i:after {
    content: "-";
}

有人知道如何获得内容"的价值吗?

Any idea how to get the value of "content"?

推荐答案

您正在使用By.xpath，但是i[@class='tree-branch-head']::after不是有效的XPath，它是XPath表示法(i[@class='tree-branch-head'])和CSS().

You are using By.xpath but i[@class='tree-branch-head']::after is not a valid XPath, it is a mixture of XPath notation (i[@class='tree-branch-head']) and CSS (:after).

您应该使用By.cssSelector和有效的CSS选择器，例如i.tree-branch-head:after.如果Selenium接受了伪元素，那是行得通的.

You should use By.cssSelector and a valid CSS selector, for example i.tree-branch-head:after. This would work if Selenium accepted pseudo elements, which it does not.

要变通解决此问题，您可以使用Chromium，它会生成额外的伪元素::after和::before，或使用Javascript提取程序，如https://stackoverflow.com/a/28265738/449288 .

To work around this problem, you can either use Chromium, that generates extra fake elements ::after and ::before, or use a Javascript extractor as described in https://stackoverflow.com/a/28265738/449288.

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