Set up Master CSS in React
Guide to setting up Master CSS in your React project.
Master CSS Runtime Rendering observes changes in DOM class names at browser runtime, generates corresponding CSS rules, and injects them into the running style sheet.
Fixed style cost
All features work out of the box with ~17KB transfer cost
Fully automatic
Capture any program-generated class names
CSS lifecycle
Generated on-demand and frees memory when not in use
A full-stack framework, such as Next.js, Remix, etc., is recommended for better application performance and experience.
Quick start
Clone the example
Copy-paste the commands to quickly start using the https://react.rr.rc.css.master.co example.
You can skip all installation steps.
npm create @master/css@rc <project> --example reactcd <project>npm run devInstallation
Create a project
If you don't have a React project, create one first. It's recommended to refer to Start a New React Project.
npm create vite@latest <project> -- --template react-tscd <project>Initialize configuration file
Run the command to create a configuration file master.css.ts.
npm create @master/css@rcInstall Master CSS
Install Master CSS into your project via package managers.
npm i @master/css.react@rcSet up CSS runtime engine
- Import your custom configuration
master.css.ts - Initialize the runtime engine using
CSSRuntimeProvider - Add
display: nonein<html>to avoid FOUC
import React from 'react'import ReactDOM from 'react-dom/client'import App from './App'import './index.css'import CSSRuntimeProvider from '@master/css.react' import config from '../master.css' ReactDOM.createRoot(document.getElementById('root') as HTMLElement).render( <React.StrictMode> <CSSRuntimeProvider config={config}> <App /> </CSSRuntimeProvider> </React.StrictMode>,)Prevent flash of unstyled content
Add <html hidden> to avoid FOUC caused by the runtime engine not yet injecting CSS rules.
<!DOCTYPE html><html lang="en" hidden>…Launch server
Run the Vite development server.
npm run dev -- --openHello world!
Now style your first element using Master CSS syntax!
export default function App() { return ( <h1 className="font:40 font:heavy italic m:12x text:center">Hello World</h1> )}Open your browser to watch the changes.