CSS matchers give Selenium WebDriver the ability to search the DOM using complex criteria. In this video we will cover how to construct complex queries using CSS and to discuss what we can do with CSS that could not be done with previous finders
If you are not sure if the browser you are testing supports your pseudo-class you can check on Can I Use. For instance, if you wanted to check the is the
:valid pseudo class, you'd search for it. The Mozilla Developer Network also provides Browser Compatibility tables.
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