JSFiddle - React, Tailwind, and code Playground

HTML

<div id="qwe"></div>

CSS

#qwe { display: block; margin: 20px; font-size: 14pt; }

JavaScript

qqq = 0;
setInterval(function(){
    qqq++; 
    if ( qqq == 1 ) $('#qwe').text('.');  
    else if ( qqq == 2 ) $('#qwe').text('..');  
    else if ( qqq == 3 ) $('#qwe').text('...'); 
    else {
        $('#qwe').empty(); 
        qqq = 0;
    }
},500);