如何使用硒python获取伪元素的css值? [英] How to get css value of pseudo element with selenium python?

问题描述

我有html o页面:

I have html o page:

<div id="foo" class="bar" title>
  ::before
</div>

在选择 :: before 的Chrome或Firefox上，我可以在样式"选项卡上看到CSS:

With Chrome or Firefox on selection ::before I can see css on Styles tab:

.SomeTitle .bar::before{
content: "required_value"
}

选择< div id ="foo" class ="bar" title> 后，它以 Pseudo :: before元素呈现.我确实试图获得 content 的价值:

After selection <div id="foo" class="bar" title> it presented in Pseudo ::before element. I did try to get value of content:

browser = webdriver.Firefox()
browser.get(my_url)
my_element = browser.find_element_by_xpath("//*[@id='foo']")
my_elemet.value_of_css_property("content")

但是它不会返回任何内容.如何获得 content 的价值?

But it does returns none. How can I get value of content?

推荐答案

好像我找到了解决方案.这不是纯硒，但确实可以.

Looks like I did find solution. This is not pure selenium but it does works.

browser.execute_script("return window.getComputedStyle(document.querySelector('.SomeTitle .bar'),':before').getPropertyValue('content')")

希望这对某人有帮助.

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