Article Preview Component built with HTML, CSS & Javascript

I built this component as close to the design as possible. The only thing I wasn't able to figure out was how to toggle the background change when clicking on the share button when the breakpoint width was for a mobile and I was also not able to figure out how to add some good animation when the share button was clicked. If you have any suggestions on how to do any of the tasks mentioned above and also a better way to write my code in HTML, CSS, or Javascript or any feedback regarding the project then please feel free to drop your suggestion.