JSFiddle - React, Tailwind, and code Playground

HTML

Loading<span class="one">.</span><span class="two">.</span><span class="three">.</span>

CSS

body {
    padding: 25px;
    font-size: 24px;
}

.one {
    opacity: 0;
    -webkit-animation: dot 1.3s infinite;
    -webkit-animation-delay: 0.0s;
    animation: dot 1.3s infinite;
    animation-delay: 0.0s;
}

.two {
    opacity: 0;
    -webkit-animation: dot 1.3s infinite;
    -webkit-animation-delay: 0.2s;
      animation: dot 1.3s infinite;
      animation-delay: 0.2s;
}

.three {
    opacity: 0;
    -webkit-animation: dot 1.3s infinite;
    -webkit-animation-delay: 0.3s;
     animation: dot 1.3s infinite;
     animation-delay: 0.3s;
}

@-webkit-keyframes dot {
      0% { opacity: 0; }
     50% { opacity: 0; }
    100% { opacity: 1; }
}

@keyframes dot {
      0% { opacity: 0; }
     50% { opacity: 0; }
    100% { opacity: 1; }
}