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I was learning GSAP through resource available on the website. In the codepen Who's That Pokémon? - forEach example (codepen.io) the .cover class needs to have opacity zero when the mouse is hovered over the card as per the code which means that the image should fade away. However it is not happening. I tried changing the code but it wont work. Any idea why the image is not getting faded when hovered over the card? Thanks.