C#:硒在伪选择器数据之前获取:: [英] C#: Selenium getting ::before pseudo selector data

问题描述

我在接收伪选择器数据时遇到麻烦.

I'm having some trouble receiving pseudo selector data.

driver.FindElement(By.CssSelector(selector));

我的选择器字符串本质上是button:nth-child(2)，可以正常工作， 但我还需要获取伪数据和button:nth-child(2)::before 不是很有效，它只是保持为空.

My selector string is essentially button:nth-child(2) which works fine, but I also need to get the pseudo data as well and button:nth-child(2)::before isn't quite working, it just remains null.

我的语法不正确吗?还是应该使用其他方法或类似的方法?

Is my syntax incorrect or should I be using a different method or something along those lines?

推荐答案

Selenium API不支持伪元素，但是您可以使用一段JavaScript来获取当前样式的属性:

The Selenium API doesn't support pseudo elements, but you can get the properties of the current style with a piece of JavaScript:

var elem = driver.FindElement(By.CssSelector(...));

var pseudo_content = driver.ExecuteScript(
    "return window.getComputedStyle(arguments[0],':before').getPropertyValue('content');"
    , elem);

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