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CSS has received added functionalities that have strengthened the HTML-CSS bond even more. With the introduction of CSS Selectors level 4, we also get Time Dimensional, Grid-structural, and Video state pseudo-classes and CSS could be the go-to language for even more functionalities. CSS is used to design the web page and creating a responsive layout, and JavaScript is usually used to add interactivity, functionality and much more. The use of CSS animations makes sense if you have a small or perhaps less complex animations.