JSFiddle - React, Tailwind, and code Playground

HTML

<html>
    <head>
    </head>
    <body>
        <div style="height:1500px">
            <button class="myLinkToTop" id="but1" >1</button>
        </div>
            <button class="myMenuLink" id="but1" >2</button>
    </body>
</html>

JavaScript

$('.myLinkToTop').click(function () {
    $('html, body').animate({scrollTop:$(document).height()}, 'slow');
    return false;
});

$('.myMenuLink').click(function () {
    $('html, body').animate({scrollTop:0}, 'slow');
    return false;
});