@language-lit/material3-expressive

A framework-neutral React implementation of Material 3 Expressive. It ships precompiled CSS, typed theme and token APIs, native web semantics, and 41 conformant public components with no runtime dependencies.

Install

npm install @language-lit/material3-expressive

React 18 or React 19 is the only peer requirement.

Use

Import components from the package root and the complete stylesheet once:

import {
  Button,
  Material3Provider,
} from '@language-lit/material3-expressive'
import '@language-lit/material3-expressive/styles.css'

export function App() {
  return (
    <Material3Provider colorMode="system">
      <Button>Continue</Button>
    </Material3Provider>
  )
}

The library does not require Tailwind, a content glob, a preset, runtime style injection, or framework-specific adapters. Material3Provider defaults to the complete theme and system color mode.

Entry points

Entry	Purpose
@language-lit/material3-expressive	React components, provider, and hooks
@language-lit/material3-expressive/theme	Theme creation and types; React-free
@language-lit/material3-expressive/tokens	Token schemas, defaults, and CSS generation; React-free
@language-lit/material3-expressive/styles.css	Complete tokens and component styles

Documentation

The full documentation, with live component demos and an interactive theme playground, is at m3e.language-lit.com. It is built from this repository — see site/.

• Documentation index
• Getting started
• Theming
• SSR and system color mode
• Supported components
• Migrating from 0.3
• Web deviations
• Release notes and breaking changes

The supported-component matrix is generated from the machine-readable inventory. Only entries marked conformant are part of the advertised support surface.

T66 currently stages the date-picker family, time picker, and civil date-time composition as experimental. Their public APIs and examples are available for task verification, but they do not enter the advertised support count until the aggregate and real-browser promotion gates pass.

Upgrading from 0.3

1.0.0 replaces the 0.3 API entirely. The Tailwind preset, the components/* subpaths, the ./styles export, and the legacy hooks and utilities are gone; imports move to the root entry and CSS moves to /styles.css. Read the migration guide before upgrading. Applications that are not ready can stay on 0.3.x, which remains published.

Development

npm install
npm run playground
npm run check:docs
npm run verify

The playground runs at http://localhost:5173. The aggregate verification checks types, tests, package output, architecture, documentation, CSS, tokens, the release contract, bundle budgets, and packed Vite/Next consumer fixtures.

License

MIT