Handling javascript alerts, confirmation and prompts?

So how to handle javascript alerts, confirmation and prompts?


JavaScript popups are generated by web application and hence they can be easily controlled by the browser.
Webdriver offers the ability to cope with javascript alerts using Alerts API
// Get a handle to the open alert, prompt or confirmation
Alert alert = driver.switchTo().alert();
Alert is an interface. There below are the methods that are used
//Will Click on OK button.
alert.accept();
// Will click on Cancel button.
alert.dismiss()
//will get the text which is present on th Alert.
alert.getText();
//Will pass the text to the prompt popup
alert.sendkeys();
//Is used to Authenticate by passing the credentials
alert.authenticateUsing(Credentials credentials)

This program will demonstrate you working on Alerts popup using above html file.