It takes as much energy to wish as it does to plan. — Eleanor Roosevelt
I absolutely love the design of the Sandwich site. Among many beautiful features are these headlines with rainbow underlines that move as you scroll. It's not scroll-jacking — it's just a minor design feature that uses scroll position to enact a little movement. … Read article
Perhaps the easiest way to offer that to the user is a link that targets an ID on the <html></html> element. So like...
<html id="top">
<body>
<!-- the entire document -->
<a href="#top">Jump to top of page</a>
</body>
</html>But we've got a few options here.… Read article
You scroll down to a certain point, now you want to style things in a certain way. A header becomes fixed. An animation triggers. A table of contents appears. To do anything based on scroll position, JavaScript is required right now. You watch the scroll position via a DOM event and alter an element's styling based on that position. Or, probably better if you can, use IntersectionObserver. We just blogged about all this.
Now there is a new (unofficial) … Read article
Let's say you wanted to scroll a web page from top to bottom programmatically. For example, you're recording a screencast and want a nice full-page scroll. You probably can't scroll it yourself because it'll be all uneven and jerky. Native JavaScript can do smooth scrolling. Here's a tiny snippet that might do the trick for you:
window.scrollTo({
top: document.body.getBoundingClientRect().height,
behavior: 'smooth'
});But there is no way to control the speed or easing of that! It's likely to … Read article
Smooth scrolling has gotten a lot easier. If you want it all the time on your page, and you are happy letting the browser deal with the duration for you, it's a single line of CSS:
html {
scroll-behavior: smooth;
}I tried this on version 17 of this site, and it was the second most-hated thing, aside from the beefy scrollbar. I haven't changed the scrollbar. I like it. I'm a big user of scrollbars and making it … Read article
Rik Schennink documents a system for being able to write CSS selectors that style a page when it has scrolled to a certain point. If you're like me, you're already on the lookout for document.addEventListener('scroll' ... and being terrified about performance. Rik gets to that right away by both debouncing the function as well as marking the event as passive.… Read article
Any overflow value other than visible and no height is the enemy of child elements with position: sticky;. It's like that element is ready to stick when the parent scrolls, but it never does because the height is unconstrained. Adding a fixed height can solve the issue, but that's not always desirable.
Dannie Vinther digs into a way of dealing with that. The end result is avoiding that situation all together by removing the element that wants to be … Read article
CSS scroll snapping allows you to lock the viewport to certain elements or locations after a user has finished scrolling. It’s great for building interactions like this one:… Read article
position: relative creates a new context for absolute positioning within an element? Well, position: sticky is a locally scoped version of position: fixed. Let's take a look at how that works using a modal with a sticky close button as an example. 
The scroll-behavior property in CSS allows us to define whether the scroll location of the browser jumps to a new location or animates the transition when a user clicks a link that targets an anchored position within a scrolling box.… Read article