How to fill in the field in Selenium to determine whether the verification passed?

Question

JavaScript

How to fill in a field in Selenium to determine if the field has passed verification? with correct information, the div acquires the .success class, and in case of an error, the .error class.
It is necessary while filling out the form to wait for the check after the class appears in the div and then continue. And in case of an error to throw out in a broad gull. I look at the documentation but I don’t understand how to wait for the appearance of the class.

Answer 1

driver.wait(function() {
    return driver.findElement(locator).isDisplayed();
}, timeout);

Where locator is the search criteria, in your case, by CSS class.