wI'm currently trying to fullscreen an iFrame on a button click, similar to this website. This website has a bar that goes fullscreen with the iframed game, which is what I would ideally like to do. I can't really figure out how to do this. If possible, I would prefer to use no JavaScript, but let me know if there is an easier method with JavaScript. I'm pretty new to coding, so any help would mean a lot.

Below is the iFrame code and the image/title of the game.

  
    
    



     1v1.lol
 
    
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