JSFiddle - React, Tailwind, and code Playground

by Zeaklous

HTML

<div class='pulse'></div>

CSS

@-webkit-keyframes pulsate {
    0% {
        -webkit-transform: scale(0.8, 0.8);
        opacity: 0.3;
    }

    50% {
        -webkit-transform: scale(1, 1);
        opacity: 1.0;
    }

    100% {
        -webkit-transform: scale(0.8, 0.8);
        opacity: 0.3;
    }
}
@-moz-keyframes pulsate {
    0% {
        -moz-transform: scale(0.8, 0.8);
        opacity: 0.3;
    }

    50% {
        -moz-transform: scale(1, 1);
        opacity: 1.0;
    }

    100% {
        -moz-transform: scale(0.8, 0.8);
        opacity: 0.3;
    }
}
@-o-keyframes pulsate {
    0% {
        -o-transform: scale(0.8, 0.8);
        opacity: 0.3;
    }

    50% 
        -o-transform: scale(1, 1);
        opacity: 1.0;
    }

    100% {
        -o-transform: scale(0.8, 0.8);
        opacity: 0.3;
    }
}
@keyframes pulsate {
    0% {
        transform: scale(0.8, 0.8);
        opacity: 0.3;
    }

    50% {
        transform: scale(1, 1);
        opacity: 1.0;
    }

    100% {
        transform: scale(0.8, 0.8);
        opacity: 0.3;
    }
}

/* For demo purposes */
.pulse {
    width:100px; height:100px;
    margin: 0 auto;
    background:black;
    border-radius:50%;
    -webkit-animation:pulsate 3s infinite;
    -moz-animation:pulsate 3s infinite;
    -o-animation:pulsate 3s infinite;
    animation:pulsate 3s infinite;
}