JSFiddle - React, Tailwind, and code Playground

HTML

<div class="ball"></div>

CSS

body {margin: 100px;}

@-webkit-keyframes pulsate {
    from {
        -webkit-transform: scale(0.7);
    }    
    to {
        -webkit-transform: scale(0.8);
    }
}

.ball {
    background: blue;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    transition: all 1s;
    
    -webkit-transform: scale(0.7);
    -webkit-transform-origin: center center; 
    
    -webkit-animation-duration: 800ms;
    -webkit-animation-name: pulsate;
    -webkit-animation-iteration-count: infinite;
    -webkit-animation-direction: alternate;
    -webkit-animation-timing-function: ease-in-out;
}

.ball:hover {
    -webkit-transform: scale(2);
    -webkit-animation-play-state: paused; /* transition works but gets reset at the end*/
    /*-webkit-animation: 0;*/ /* transition works only one time, and no smooth transition on mouse out */
}