JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

div {
    height: 4000px;
    border: 1px solid #ccf;
}
.pararScroll {
    overflow: hidden;
    background-color: #eee;
}

JavaScript

window.addEventListener('scroll', function (e) {
    var scrollTop = window.pageYOffset || document.documentElement.scrollTop;
    if (scrollTop > 1000) document.body.classList.add('pararScroll');
});