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Stop Animations During Window Resizing

Say you have page that has a bunch of transitions and animations on all sorts of elements. Some of them get triggered when the window is resized because they have to do with size of the page or position or padding or something. It doesn't really matter what it is, the fact that the transition or animation runs may contribute to a feeling of jankiness as you resize the window. If those transitions or animations don't deliver any benefit in … Read article

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Various Methods for Expanding a Box While Preserving the Border Radius

I've recently noticed an interesting change on CodePen: on hovering the pens on the homepage, there's a rectangle with rounded corners expanding in the back.… Read article

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CSS Animation Libraries

There are an awful lot of libraries that want to help you animate things on the web. These aren't really libraries that help you with the syntax or the technology of animations, but rather are grab-and-use as-is libraries. Want to apply a class like "animate-flip-up" and watch an element, uhhh, flip up? These are the kind of libraries to look at.

I wholeheartedly think you should both 1) learn how to animate things in CSS by learning the syntax yourself … Read article

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The State of Changing Gradients with CSS Transitions and Animations

Back in 2012, Internet Explorer 10 came out and, among other things, it finally supported CSS gradients and, in addition to that, the ability to animate them with just CSS! No other browser supported this at the time, but I was hopeful for the future.

Sadly, six years have passed and nothing has changed in this department. Edge supports animating gradients with CSS, just like IE 10 did back then, but no other browser has added support for this. And … Read article

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Using CSS Transitions on Auto Dimensions

We've all been there. You've got an element you want to be able to collapse and expand smoothly using CSS transitions, but its expanded size needs to be content-dependent. You've set transition: height 0.2s ease-out. You've created a collapsed CSS class that applies height: 0. You try it out, and... the height doesn't transition. It snaps between the two sizes as if transition had never been set. After some fiddling, you figure out that this problem only happens … Read article