Handling iFrames in Selenium Webdriver: switchTo()

What is an Iframe or frame?
 An iframe is also known as the inline frame. It is a tag used in HTML5 to embed an HTML document within a parent HTML document. An iframe tag is defined using <iframe></iframe> tags.
IFrame is a web page which is embedded in another web page or an HTML document embedded inside another HTML document.

The frame enables a developer to split the screen horizontally or vertically by using the frameset tag. Frame and frameset tags are deprecated as they are no longer supported by HTML 5.

How to Identify the Iframe?

• Right click on the element, If you find the option like View Frame Source' then it is an iframe.
• From DOM tree. Search with tag ‘iframe’
• Right click on the page and click 'View Page Source' and Search with the 'iframe‘
• Through selenium locator tagName in the script  -- By.tagName("iframe")

To work with different frames, we need to use the SwitchTo().frame method. This method enables the browser to switch between multiple frames. It can be implemented in the following ways:

switchTo.frame(int  frame number): Defining the frame index number, the Driver will switch to that specific frame
switchTo.frame(string  frameNameOrId): Defining the frame element or Id, the Driver will switch to that specific frame
switchTo.frame(WebElement  frameElement): Defining the frame web element, the Driver will switch to that specific frame.

Selenium Script on iframe:

import java.util.List;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;

public class IframeDemo {

 public static void main(String[] args) throws InterruptedException {

  WebDriver driver;
  System.setProperty("webdriver.chrome.driver",
    "C:\\Users\\Hitendra\\Downloads\\chromedriver_win32\\chromedriver.exe");
  driver = new ChromeDriver();
  driver.manage().window().maximize();
  driver.get("https://www.automationtestinginsider.com/2019/08/textarea-textarea-element-defines-multi.html");
  Thread.sleep(2000);
  //First finding the elements using any of locator strategy
  List<WebElement> iframList = driver.findElements(By.tagName("iframe"));
  int totalFrames = iframList.size();
  System.out.println("No of Frames:" + totalFrames);
  WebElement ele=driver.findElement(By.name("iframe_b"));
  System.out.println("Frame Names are:");
  for (WebElement iframe : iframList) {
   System.out.println(iframe.getAttribute("name"));
   if (iframe.getAttribute("name").equals("iframe_b")) {
    //switch to frame by element
    driver.switchTo().frame(ele);
    //Perform all the required tasks 
    driver.findElement(By.id("searchInput")).sendKeys("iframe Testing");
    Thread.sleep(2000);
    //Switching back to the main window
                driver.switchTo().defaultContent();
   }
  }
  boolean btnDisplayed=driver.findElement(By.id("simpleAlert")).isDisplayed();
  System.out.println(btnDisplayed);
  driver.close();
 }
}

Please refer below YouTube video to get more details: