Smooth scroll is JS code that you can add to a link or button going somewhere else on the page to make the transition smoother. Without smooth scroll, clicking on the link will take you to that part of the page without a transition. With smooth scroll, it is easier to understand what is going on when you click the link.

Demo

Vero thundercats etsy, cray green juice dolore odio quinoa mollit organic farm-to-table nisi paleo pinterest. Minim laborum chillwave yr, raw denim DIY locavore distillery assumenda sed gastropub. Occaecat kogi mollit, viral laboris hella blog forage esse. Single-origin coffee butcher pork belly, tilde mlkshk elit kombucha intelligentsia. Ex chambray church-key, adipisicing nostrud authentic waistcoat laboris sapiente thundercats. Ennui vinyl offal, lomo disrupt master cleanse 8-bit messenger bag. Echo park heirloom qui assumenda skateboard thundercats consequat, voluptate meggings aliqua blue bottle helvetica mollit swag.

Affogato assumenda health goth fanny pack. Ugh officia bicycle rights, assumenda 3 wolf moon normcore tattooed deep v magna. Incididunt delectus in assumenda, raw denim mollit green juice narwhal swag voluptate sunt kombucha man bun. Chartreuse PBR&B ennui echo park, gluten-free exercitation narwhal proident deep v fingerstache normcore. Kitsch hammock celiac, beard truffaut austin viral. Offal anim messenger bag, distillery cred organic cronut. Cray put a bird on it reprehenderit, keytar shabby chic et nesciunt odio chambray messenger bag eu.

Single-origin coffee normcore yr, crucifix narwhal YOLO cronut church-key. Meditation slow-carb deserunt commodo ullamco, et put a bird on it labore. Cillum whatever tempor fashion axe, polaroid velit pork belly pour-over austin enim fingerstache VHS mlkshk pickled paleo. Hashtag semiotics gluten-free, messenger bag pug schlitz salvia etsy tofu commodo odio gochujang. Aliquip bespoke pork belly brunch ethical, jean shorts cold-pressed esse incididunt. Nisi hella heirloom yr gentrify, velit craft beer squid health goth. Everyday carry man braid direct trade est, trust fund normcore pork belly.

Bitters trust fund pop-up chia duis tousled. Ea before they sold out cold-pressed vegan nesciunt distillery, delectus craft beer kinfolk pour-over qui hashtag retro duis. Four loko qui pop-up, shoreditch id dolore food truck. Man bun id consequat church-key, mlkshk ugh chia. Slow-carb flannel truffaut PBR&B excepteur pork belly deep v. Adipisicing literally chambray, keytar butcher occaecat accusamus laboris twee. Drinking vinegar selfies pitchfork, consequat tumblr dolor lumbersexual quis master cleanse tousled bespoke four loko roof party man braid poutine.

HTML

<p>...</p>
<a href="#top">
    <button class="button">Go to Top</button>
</a>

JS

window.onload=function() {
    $('a[href*="#"]').on('click',function(event) {
        event.preventDefault();

        $('html,body').animate({scrollTop:$(this.hash).offset().top}, 500);
    });
}