Introduction/API Reference/Configuration/next.config.js/useLightningcssuseLightningcssExperimental support for using Lightning CSS, a fast CSS bundler and minifier, written in Rust. next.config.tsnext.config.jsimport type { NextConfig } from 'next' const nextConfig: NextConfig = { experimental: { useLightningcss: true, }, } export default nextConfiguseCacheLearn how to enable the useCache flag in Next.js.viewTransitionEnable ViewTransition API from React in App Router