How to handle javascript alerts, confirmation and prompts?

Generally JavaScript popups are generated by web application and hence they can be easily controlled by the browser.

// 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)

Sample Program to handle alerts

	package test.qaearth;
	import org.openqa.selenium.Alert;
	import org.openqa.selenium.By;
	import org.openqa.selenium.firefox.FirefoxDriver;
	public class PopupsHandling {
	public static void main(String a[]) throws InterruptedException {
	System.setProperty("webdriver.gecko.driver", "Drivers/geckodriver.exe");
	FirefoxDriver driver = new FirefoxDriver();
	driver.manage().window().maximize();
	driver.navigate().to("https://qaearth.blogspot.in/p/testing-examples.html");
	driver.findElement(By.cssSelector("#alert")).click();
	Thread.sleep(2000);
	Alert alert = driver.switchTo().alert();
	System.out.println(alert.getText());
	alert.sendKeys("Krishna");
	alert.accept();
	// Dismiss
	driver.findElement(By.cssSelector("#alert")).click();
	Thread.sleep(2000);
	Alert alert = driver.switchTo().alert()
	alert.dismiss();
	}
	}

view raw PopupsHandling.java hosted with ❤ by GitHub