JSFiddle - React, Tailwind, and code Playground

HTML

<p id="target"></p>

CSS

p {
    display:block;
    text-align:center;
    width: 20px;
}

JavaScript

var str = '|/—\\';    
var target = $('#target');
var x = 0;
setInterval(function(){
    target.text(str.charAt((x++)%str.length))
},500)