![]() ![]() To achieve the effect above with CSS, the code would look something like this: transition : transform 500ms linear Ease-out animations #Įasing out causes the animation to start more quickly than linear ones, and it also has deceleration at the end.Įasing out is typically the best for user interface work, because the fast start gives your animations a feeling of responsiveness, while still allowing for a natural slowdown at the end. Whether you’re coding your animations using CSS or JavaScript, you’ll find that there is always an option for linear motion. ![]() Generally speaking, you should avoid linear motion. With linear motion, things tend to feel robotic and unnatural, and this is something that users find jarring. A graph of a linear transition looks like this:Īs time moves along, the value increases in equal amounts. Linear animations #Īnimations without any kind of easing are referred to as linear. ![]() You can also use a steps keyword, which allows you to create transitions that have discrete steps, but the keywords listed above are the most useful for creating animations that feel natural. Here are some of the keywords that you can use in CSS: You can also go completely custom with your easing, which gives you a lot more freedom to express your app's personality. You can use keywords that affect the easing (or timing, as it's sometimes called) of the animation in question. Easing keywords #ĬSS transitions and animations both let you choose the kind of easing you want to use for your animations. Sometimes the two are combined, which is called "ease in out." Easing, then, is really the process of making the animation less severe or pronounced. In classic animation, the term for motion that starts slowly and accelerates is "slow in," and for motion that starts quickly and decelerates is "slow out." The terminology most commonly used on the web for these are “ease in” and “ease out,” respectively. Avoid ease-in or ease-in-out animations unless you can keep them short they tend to feel sluggish to end users.Choose ease-out animations for UI elements.Easing makes your animations feel more natural.Natural motion makes your users feel more comfortable with your apps, which in turn leads to a better overall experience. Our brains are wired to expect this kind of motion, so when animating, you should use this to your advantage. In reality, things tend to accelerate or decelerate as they move. Nothing in nature moves linearly from one point to another. ![]()
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