JSFiddle - React, Tailwind, and code Playground

HTML

Variable Price: <span id="val"><span>

JavaScript

window.setInterval(function(){
            var price = 577;
            var randomVal = (Math.random()*(10 - (-10) + 1)) + (-10);
            randomVal = randomVal / 100;
            randomVal = Number(randomVal.toFixed(2));            
            price += randomVal;
            $('#val').html(price);
        
    }, 1000);