Selenium Webdriver with Shadow DOM

问题

While using Selenium Webdriver in C#, I get an exception when trying to select an element that exists under Shadow DOM.

The exception I am getting is: NoSuchElementException

How would you suggest to use Selenium with Shadow DOM?

Thanks,

Michal

回答1:

Try to locate your element like this:

driver.FindElement(By.CssSelector('selector_otside_shadow_root /deep/ selector_inside_shadow_root')); 

in your case it would be:

driver.FindElement(By.CssSelector('app-home /deep/ #itemName1'));

You can test this approach in chrome://downloads/ link with this css_selector:

downloads-manager /deep/ downloads-item /deep/ [id=file-link]

in dev tools. As you can see there was needed to pass two shadow-root elements, so make sure that you have only one shadow-root element or use multiple /deep/ like in example above.

or you can use JavasciptExecutor like this:

IJavaScriptExecutor js = (IJavaScriptExecutor)_driver;
var element = js.ExecuteScript("return document.querySelector('selector_outside_shadow_root').shadowRoot.querySelector('selector_inside_shadow_root');");

• Note: the first suggestion as far I know works only in Chrome, if you want a cross browser solution - use the second one.

来源：https://stackoverflow.com/questions/51346883/selenium-webdriver-with-shadow-dom