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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchUse a reusable set of CSS classes to animate elements as a page loads: one class for shared timing, another for the visual effect, and optional delay classes to stagger the sequence. This is a CSS pattern, not a scroll-triggered system; it does not detect when an element enters the viewport.
How the entrance-animation system is organized
Neale Van Fleet’s CSS-Tricks tutorial, published November 29, 2021, builds the effect from three independent pieces: a shared .animate class, an effect class such as .fade or .pop, and optional delay classes. Keeping those responsibilities separate lets you change timing without rewriting every effect, or apply the same effect with different start times. Read the CSS-Tricks tutorial.
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Shared animation settings
The base class holds settings common to the animations, such as duration, timing behavior, and fill mode. The effect class selects the relevant keyframes, which define how properties change over the animation. The examples use properties including opacity, transforms, and filters.
Effect classes
A fade changes opacity; a pop combines opacity and scale transforms with a cubic-bezier timing curve. The tutorial’s larger set also includes blur, glow, flip, spin, slide, and drop. These are visual options, not a claim that every effect suits every interface. Choose an effect that supports the content rather than making important information harder to follow.
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Build a simple fade and apply it
This minimal example illustrates the same division of responsibilities. The duration and easing live in the shared class; the fade keyframes define the appearance; and the optional delay class controls when the animation starts.
.animate {
animation-duration: 600ms;
animation-timing-function: ease-out;
animation-fill-mode: backwards;
}
.fade {
animation-name: fade-in;
}
@keyframes fade-in {
from { opacity: 0; }
to { opacity: 1; }
}
.delay-1 {
animation-delay: 100ms;
}Apply the classes to the element you want to animate:
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<p class="animate fade">This fades in.</p>
<p class="animate fade delay-1">This fades in after a short delay.</p>The backwards fill mode applies the animation’s starting keyframe state during the delay. In this fade, the element remains transparent while waiting, rather than appearing at full opacity before the animation begins. If you use a different effect, make sure its initial keyframe state is appropriate for the element’s delayed period.
Stagger a group of entrances
Give each element a different animation-delay to make a group enter in sequence. The tutorial’s simple example spaces delays by about one tenth of a second, and its larger stylesheet includes additional delay classes. For example, define several reusable delays:
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.delay-1 { animation-delay: 100ms; }
.delay-2 { animation-delay: 200ms; }
.delay-3 { animation-delay: 300ms; }Then assign them in order to a list of elements. Tune the delay and animation duration to the quantity and importance of the content; the tutorial does not establish a universal timing rule or report usability testing.
Respect reduced-motion preferences
The tutorial demonstrates turning off these animations when the user requests reduced motion:
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@media (prefers-reduced-motion: reduce) {
.animate {
animation: none !important;
}
}With the animation removed, elements appear without the entrance effect. The tutorial also notes that reduced motion does not always have to mean removing all motion. If motion communicates a meaningful state change, a team may choose a shorter or less spatially expansive treatment instead; that is an implementation choice, not a tested outcome established by the tutorial.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What this pattern does—and does not do
The approach uses CSS classes and keyframes to animate elements as a page loads. It does not include a mechanism for detecting when an element scrolls into view, so it should not be described as a viewport-triggered animation system. The CSS-Tricks article dates to November 29, 2021, and does not establish current browser compatibility or runtime performance. Check those separately for your target browsers and project before relying on them.
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