How to check if element contains specific class attribute

Question

How can I check if a selenium web element contains a specific css class.

I have this html li element

Answer 1

Use javascript: classList.contains

 WebElement element = By.id("id");
 String className = "hidden";
 JavascriptExecutor js = (JavascriptExecutor) driver;
 Boolean containsClass = js.executeScript("return arguments[0].classList.contains(arguments[1])", element, className);