JSFiddle - React, Tailwind, and code Playground

HTML

Loading<span class="ellipsis">...</span>

CSS

.ellipsis {
    overflow: hidden;
    display: inline-block;
    vertical-align: bottom;
    -webkit-animation: ellipsis 2s infinite;
    -moz-animation: ellipsis 2s infinite;
}
@-webkit-keyframes ellipsis {
    from {
        width: 2px;
    }
    to {
        width: 12px;
    }
}
@-moz-keyframes ellipsis {
    from {
        width: 2px;
    }
    to {
        width: 12px;
    }
}