what is iframe

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IFRAMES: stands for Inline Frame
    What is Iframe?
        It is basically HTML inside of another HTML
    How do we handle Iframe?
        - Selenium can only focus on one thing at time.
        - Therefore we need to switch the driver's focus to
        specific frame to be able to do any action in it.   
    
    syntax: driver.switchTo().frame();
    
    3 different ways of handling/switching to iframe
        - 3 ways to switch
   #1- byIndex: We pass the index number of desired web element.
      
   #2- id or name: We can pass id or name attribute value directly to switch.
      
 #3- WebElement: locate web element and pass WebElement value directly to switch.
        driver.switchTo().frame(WebElement);

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