https://netguide.jp/en/tags/tailwindcss/Recent content in Tailwindcss on KaisekukunHugo -- gohugo.ioenKaisekukunWed, 01 Apr 2026 12:00:00 +0900https://netguide.jp/en/web/tailwind-css-v4-update/Wed, 01 Apr 2026 12:00:00 +0900https://netguide.jp/en/web/tailwind-css-v4-update/<img src="https://netguide.jp/img/thumbnail/tailwind-css-v4-update-en.png" alt="Featured image of post Tailwind CSS v4 Features and Migration Guide" /><p>Tailwind CSS v4.0 introduces a brand-new compilation engine written completely in Rust, accelerating build loops by up to 10x. Additionally, it transitions from a JavaScript-based configuration file (<code>tailwind.config.js</code>) to a CSS-first approach, where customizations are defined inside your primary stylesheet using standard CSS variables.</p> <p>This article reviews the major changes in Tailwind CSS v4 and provides a practical migration walkthrough to help you upgrade your projects.</p> <hr> <h2 id="1-key-changes-in-tailwind-css-v4">1. Key Changes in Tailwind CSS v4 </h2><h3 id="1-rust-powered-oxide-engine">1) Rust-Powered &ldquo;Oxide&rdquo; Engine </h3><p>The defining feature of v4 is its compiler. Rewritten in Rust, the Oxide engine processes stylesheet files significantly faster than the old PostCSS-based engine. This translates to near-instantaneous dev server startups and hot module replacement (HMR), keeping developers in their flow.</p>