JSFiddle - React, Tailwind, and code Playground

HTML

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JavaScript

document.getElementsByTagName('button')[0].onclick = function () {
   scrollTo(document.documentElement, 0, 5000);   
}
    
    function scrollTo(element, to, duration) {
        if (duration < 0) return;
        var difference = to - element.scrollTop;
        var perTick = difference / duration * 10;
        
        setTimeout(function() {
            element.scrollTop = element.scrollTop + perTick;
            scrollTo(element, to, duration - 10);
        }, 10);
    }