UnoCSS is an atomic-CSS engine that provides a highly customizable and performant way to style your web applications. It allows you to write utility-first CSS directly in your HTML or JavaScript, and it generates the necessary CSS on-demand.
Utility-First CSS
UnoCSS allows you to use utility classes directly in your HTML to style elements. In this example, the text is centered and colored red using utility classes.
<div class="text-center text-red-500">Hello, UnoCSS!</div>On-Demand Generation
UnoCSS generates the necessary CSS only for the classes you use, making it highly efficient. This example demonstrates how to create a styled button using utility classes.
import 'uno.css';
const button = document.createElement('button');
button.className = 'bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded';
document.body.appendChild(button);Customizable
UnoCSS is highly customizable. You can define your own theme and utility classes. This example shows how to configure a custom theme with specific colors.
import { defineConfig } from 'unocss';
export default defineConfig({
theme: {
colors: {
primary: '#3490dc',
secondary: '#ffed4a',
danger: '#e3342f',
},
},
});Tailwind CSS is a utility-first CSS framework that provides a set of predefined classes to build custom designs directly in your HTML. It is similar to UnoCSS in its utility-first approach but is more established and has a larger community.
Twind is a small, fast, and fully-featured utility-first CSS-in-JS solution. It provides a similar utility-first approach as UnoCSS but integrates directly with JavaScript, making it a good choice for React and other JS frameworks.
The instant on-demand Atomic CSS engine.
💡 I highly recommend reading this blog post -
Reimagine Atomic CSS
for the story behind
📚 Documentation | 🧑💻 Interactive Docs | 🤹♂️ Playground
Inspired by Windi CSS, Tailwind CSS, and Twind, but:
@apply directive.Read the documentation for more details.
UnoCSS is made possible thanks to the inspirations from the following projects:
in alphabet order
MIT License © 2021-PRESENT Anthony Fu
FAQs
The instant on-demand Atomic CSS engine.
We found that unocss demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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