How do I use XPath expressions with Selenium WebDriver?

How do I use XPath expressions with Selenium WebDriver?

You can use XPath expressions to locate elements in your web application. For example, you can use driver.findElement(By.xpath("//input[@id='username']")) to find an input field with the id 'username'.

Can you give me an example of a complex XPath expression?

Sure! A complex XPath expression could be //div[contains(@class, 'container')]//a[text()='Click Here'], which finds an anchor tag within a div that has a class containing 'container'.

What are some common mistakes to avoid when using XPath?

Common mistakes include using absolute paths instead of relative paths, not accounting for dynamic content, and forgetting to escape special characters.