内置关键帧动画
应用 Tailwind 内置的 animate-spin、animate-ping、animate-pulse 和 animate-bounce，实现常见的加载与吸引注意力效果。
内置关键帧动画 是 CoddyKit 上的免费 Tailwind CSS Academy 课时。 这是第 3 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 Tailwind CSS Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Tailwind CSS Academy 课程共包含 4 节课。
本课时的部分内容尚未翻译，以英文显示。
CSS Keyframe Animations vs Transitions
CSS transitions animate between two states defined by a start and end value. CSS keyframe animations define a sequence of multiple states and can loop indefinitely. Tailwind includes four built-in keyframe animations via the animate-* utilities. These cover the most common UI animation patterns: loading spinners, pulsing skeletons, attention-grabbing pings, and bouncing indicators — all without any custom CSS.
animate-spin
animate-spin rotates an element continuously at a constant speed — one full 360-degree rotation per second. It is the standard utility for loading spinners. Apply it to a circular element or SVG icon to indicate an in-progress operation. The animation loops indefinitely until the class is removed. Most commonly paired with an SVG ring icon that has a gap to create the familiar spinner appearance.
<!-- Loading spinner using animate-spin -->
<svg class="animate-spin h-5 w-5 text-blue-600"
xmlns="http://www.w3.org/2000/svg"
fill="none" viewBox="0 0 24 24">
<circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
<path class="opacity-75" fill="currentColor"
d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z">
</path>
</svg>
<!-- Button with spinner -->
<button class="flex items-center gap-2 bg-blue-600 text-white px-4 py-2 rounded-lg" disabled>
<svg class="animate-spin h-4 w-4" ...></svg>
Loading...
</button>animate-ping
animate-ping creates a ripple or radar-sweep effect — the element scales up and fades out in a loop. It is commonly used as a notification dot or activity indicator overlaid on top of a static element. The pinging element should be positioned absolutely on top of the real element using a wrapper with relative. The effect draws the eye to the notification without being overly distracting.
<!-- Notification badge with ping effect -->
<div class="relative inline-flex">
<button class="p-2 rounded-full bg-gray-100">
<!-- Bell icon -->
<svg class="w-5 h-5 text-gray-700" fill="none" stroke="currentColor" viewBox="0 0 24 24">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 17h5l-1.405-1.405A2.032 2.032 0 0118 14.158V11a6.002 6.002 0 00-4-5.659V5a2 2 0 10-4 0v.341C7.67 6.165 6 8.388 6 11v3.159c0 .538-.214 1.055-.595 1.436L4 17h5m6 0v1a3 3 0 11-6 0v-1m6 0H9" />
</svg>
</button>
<!-- Ping indicator -->
<span class="absolute top-0 right-0 -mt-0.5 -mr-0.5">
<span class="animate-ping absolute inline-flex h-3 w-3 rounded-full bg-red-400 opacity-75"></span>
<span class="relative inline-flex rounded-full h-3 w-3 bg-red-500"></span>
</span>
</div>animate-pulse
animate-pulse gently fades an element's opacity back and forth — from full opacity to 50% and back, on a 2-second loop. It is the perfect animation for skeleton loaders that show the shape of content while it is fetching. Apply it to gray placeholder blocks that match the layout of the content being loaded. The subtle pulsing communicates loading without being distracting.
<!-- Skeleton loader using animate-pulse -->
<div class="p-6 space-y-4">
<!-- Avatar + title skeleton -->
<div class="flex items-center gap-3">
<div class="animate-pulse bg-gray-200 rounded-full h-10 w-10"></div>
<div class="space-y-2 flex-1">
<div class="animate-pulse bg-gray-200 rounded h-4 w-1/3"></div>
<div class="animate-pulse bg-gray-200 rounded h-3 w-1/4"></div>
</div>
</div>
<!-- Content lines skeleton -->
<div class="space-y-2">
<div class="animate-pulse bg-gray-200 rounded h-4 w-full"></div>
<div class="animate-pulse bg-gray-200 rounded h-4 w-5/6"></div>
<div class="animate-pulse bg-gray-200 rounded h-4 w-4/5"></div>
</div>
</div>animate-bounce
animate-bounce moves an element up and down in a bouncing motion. It uses a cubic-bezier timing function that creates a natural deceleration at the top of each bounce. Common use cases include a down-arrow indicator prompting users to scroll, a chat bubble typing indicator, or a notification icon drawing attention to new content. The bounce is continuous by default.
<!-- Scroll indicator using animate-bounce -->
<div class="flex flex-col items-center gap-2 mt-16">
<p class="text-sm text-gray-500">Scroll to explore</p>
<svg class="animate-bounce w-6 h-6 text-gray-400"
fill="none" stroke="currentColor" viewBox="0 0 24 24">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7" />
</svg>
</div>
<!-- Typing indicator (three bouncing dots) -->
<div class="flex gap-1 p-3 bg-gray-100 rounded-2xl rounded-tl-none w-16">
<div class="animate-bounce h-2 w-2 bg-gray-400 rounded-full" style="animation-delay: 0ms"></div>
<div class="animate-bounce h-2 w-2 bg-gray-400 rounded-full" style="animation-delay: 150ms"></div>
<div class="animate-bounce h-2 w-2 bg-gray-400 rounded-full" style="animation-delay: 300ms"></div>
</div>Using animate-none to Stop Animations
animate-none removes any active animation from an element. This is useful with responsive or state variants to disable an animation at certain screen sizes or conditions. For example, you might use motion-reduce:animate-none to disable all animations for users who prefer reduced motion, or stop a loading spinner once data has loaded by toggling the class with JavaScript.
<!-- Stop animation for reduced-motion users -->
<svg class="animate-spin motion-reduce:animate-none h-5 w-5 text-blue-600">
...
</svg>
<!-- Stop animation at large screens -->
<div class="animate-pulse lg:animate-none bg-gray-200 rounded h-4 w-48">
<!-- Only pulses on mobile/tablet, static on desktop -->
</div>
<!-- JavaScript: remove animation when done -->
<!-- spinner.classList.remove('animate-spin'); -->Combining animate with Conditional Rendering
In component-based frameworks, you typically show the spinning or pulsing state conditionally based on loading state. The animation class is part of the skeleton or loading component that renders while data fetches, then replaced with real content when the fetch completes. This approach keeps animation concerns in the loading state UI rather than adding/removing classes programmatically.
// React: conditional rendering for loading state
function UserCard({ user, isLoading }) {
if (isLoading) {
return (
<div class="p-6 space-y-3">
<div class="animate-pulse bg-gray-200 rounded-full h-12 w-12"></div>
<div class="animate-pulse bg-gray-200 rounded h-4 w-32"></div>
<div class="animate-pulse bg-gray-200 rounded h-3 w-24"></div>
</div>
);
}
return (
<div class="p-6">
<img src={user.avatar} class="h-12 w-12 rounded-full" />
<p class="font-semibold mt-3">{user.name}</p>
<p class="text-gray-500 text-sm">{user.role}</p>
</div>
);
}Animation Iteration Count and Fill Mode
Tailwind's built-in animations loop infinitely by default. If you need to run an animation a specific number of times (once for an entrance animation, twice for an attention flash), you must use CSS custom properties or a custom animation class. Extend theme.extend.keyframes and theme.extend.animation in your config to add animations with controlled iteration counts and fill modes.
// tailwind.config.js — add a one-shot animation
module.exports = {
theme: {
extend: {
keyframes: {
'shake': {
'0%, 100%': { transform: 'translateX(0)' },
'20%, 60%': { transform: 'translateX(-6px)' },
'40%, 80%': { transform: 'translateX(6px)' },
},
},
animation: {
'shake': 'shake 0.5s ease-in-out 1', // runs once
},
},
},
};
<!-- Usage -->
<input class="animate-shake border-red-500" type="text" placeholder="Shake on error" />Staggering Built-In Animations
Staggering animation delays across sibling elements creates an engaging cascading effect. Tailwind does not have a built-in stagger utility, but you can use inline style attributes to set individual animation-delay values. For a list of items, offset each item's delay by 50–100ms. Keep the total stagger time under 300ms so users do not wait for the last item to appear.
<!-- Staggered skeleton loaders -->
<ul class="space-y-3">
<li class="animate-pulse bg-gray-200 rounded h-12" style="animation-delay: 0ms"></li>
<li class="animate-pulse bg-gray-200 rounded h-12" style="animation-delay: 75ms"></li>
<li class="animate-pulse bg-gray-200 rounded h-12" style="animation-delay: 150ms"></li>
<li class="animate-pulse bg-gray-200 rounded h-12" style="animation-delay: 225ms"></li>
</ul>
<!-- Staggered bounce dots -->
<div class="flex gap-1">
<div class="animate-bounce w-2 h-2 bg-blue-500 rounded-full" style="animation-delay: 0ms"></div>
<div class="animate-bounce w-2 h-2 bg-blue-500 rounded-full" style="animation-delay: 150ms"></div>
<div class="animate-bounce w-2 h-2 bg-blue-500 rounded-full" style="animation-delay: 300ms"></div>
</div>Applying Animations Responsively
Like all Tailwind utilities, animate classes work with responsive prefixes. You can disable an animation on large screens where the loading state might be less necessary, or apply different animations at different breakpoints. Use sm:, md:, lg: prefixes with animate-none to progressively disable animations as the viewport grows, keeping the experience lean on desktop.
<!-- Animate on mobile, static on desktop -->
<div class="animate-pulse md:animate-none bg-gray-200 rounded h-12 w-full">
Pulses on mobile, static on md+ screens
</div>
<!-- Spinner only visible on small screens -->
<svg class="animate-spin sm:hidden h-5 w-5 text-blue-600" ...></svg>
<!-- Use different animations at different breakpoints -->
<div class="animate-bounce md:animate-ping lg:animate-spin h-4 w-4 rounded-full bg-green-500">
Different animation per breakpoint
</div>Real-World Loading Pattern
A production-quality loading experience combines multiple animation utilities. The main content area shows a skeleton with animate-pulse on placeholder blocks. A status indicator uses animate-ping. If there is a visible spinner in a button or header, animate-spin is applied to the spinner SVG. All animations should stop once the content loads, replaced by the real content without any jarring jump.
<!-- Full loading state with multiple animations -->
<div class="border border-gray-200 rounded-xl p-6">
<!-- Status indicator -->
<div class="flex items-center gap-2 mb-4">
<div class="relative">
<span class="animate-ping absolute h-3 w-3 rounded-full bg-blue-400 opacity-75"></span>
<span class="h-3 w-3 rounded-full bg-blue-600 block relative"></span>
</div>
<span class="text-sm text-gray-500">Fetching data...</span>
<svg class="animate-spin h-4 w-4 text-blue-500 ml-auto" fill="none" viewBox="0 0 24 24">
<circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
</svg>
</div>
<!-- Skeleton content -->
<div class="space-y-3">
<div class="animate-pulse h-4 bg-gray-200 rounded w-3/4"></div>
<div class="animate-pulse h-4 bg-gray-200 rounded w-1/2"></div>
<div class="animate-pulse h-4 bg-gray-200 rounded w-5/6"></div>
</div>
</div>Quick Check
Test your understanding of Tailwind's built-in keyframe animations.
Lesson Recap
In this lesson you learned: animate-spin creates loading spinners, animate-ping creates notification ripples, animate-pulse creates skeleton loaders, and animate-bounce creates vertical bouncing indicators. Use motion-reduce:animate-none to disable animations for users who prefer reduced motion. Next up we create custom keyframe animations via the Tailwind config.
常见问题解答
「内置关键帧动画」课时是免费的吗？
是的 — 「内置关键帧动画」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Tailwind CSS Academy 课程的其余内容，请升级到 CoddyKit PRO。 Tailwind CSS Academy 课程共包含 4 节课。
「内置关键帧动画」这节课中我会学到什么？
应用 Tailwind 内置的 animate-spin、animate-ping、animate-pulse 和 animate-bounce，实现常见的加载与吸引注意力效果。 你通过在浏览器中直接运行的动手代码来练习 Tailwind CSS Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。
学习 Tailwind CSS Academy 需要有经验吗？
无需任何先前经验。CoddyKit 上的 Tailwind CSS Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 3 节课，共 4 节。
「内置关键帧动画」课时需要多长时间？
大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。
我能在这节 Tailwind CSS Academy 课中编写并运行代码吗？
能。每节 Tailwind CSS Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。
此课程中的所有课时
- 过渡实用程序
- 持续时间与缓动
- 内置关键帧动画
- 在配置中创建自定义动画