JSFiddle - React, Tailwind, and code Playground

HTML

<p class="number">0</p>

CSS

.number {
    width: 100px;
    height: 40px;
    padding: 20px;
    background: #ccc;
    font: bold 35px Arial;
    color: red;
    text-align: center;
}

JavaScript

var currentNumber = $('.number').text();

$({numberValue: currentNumber}).animate({numberValue: 100}, {
    duration: 8000,
    easing: 'linear',
    step: function() { 
        $('.number').text(Math.ceil(this.numberValue)); 
    }
});