JSFiddle - React, Tailwind, and code Playground

HTML

<div>

</div>

CSS

div {
    border: 1px solid gray;
    margin: 10px;
    height: 1500px;
    overflow: auto
}

JavaScript

function f1() {
    alert(1);
};

function f2() {
    alert(2);
};

document.addEventListener("scroll", f1);
document.addEventListener("scroll", f2);