how to handle alerts

1 - 2 types of alerts.
2        1- HTML Alert: Nothing special with this one. 
3          You just locate as WebElement then click.
4        2- JS Alert: We cannot locate this web element
5           in the HTML code. 
6        You have to handle it differently
7        - We handle alerts using Alert class
8         creating ALERT object and 
9        - Alert alert = driver.switchTo().alert();
10         There are 3 options :
11        - alert.accept();
12        - alert.dismiss();
13        - alert.sendKeys();
14        
15        
16======================================================        
17    - How many different types of JS alerts do we have?
18        - 3 types of JS Alerts.
19            - Information : You can only accept.
20            - Confirmation: You can accept or decline.
21            - Prompt    : You can accept, decline, and/or sendKeys.

1If the alert on the browser comes from JavaScript, we use to
2handle them Alert class.
3Alert alert = driver.switchTo.alert();
4alert.accept();
5alert.dismiss();
6alert.sendKeys();
7alert.getText();