JSFiddle - React, Tailwind, and code Playground

HTML

<div id="test"></div>

CSS

#test {

  border-radius: 15px;

    width: 600px;

    height: 200px;

    box-shadow: 0px 0px 10px black;  
background-color: #000;
    -webkit-transition: all 2s 0s;  

}

#test:hover {
 background: -webkit-linear-gradient(left, 

                rgba(0, 0, 0, 0) 10%,

                rgba(0, 0, 0, 0.9) 100%

              ) white;
    

}