Dark Mode in 1 Line of Code — Meet vartheme

If you've ever implemented dark mode in React, you already know the struggle. You end up: Setting up context Writing localStorage logic Handling system preferences Fixing flash of white on load (FOUC) Wiring CSS variables And before you know it… you've written 200+ lines of boilerplate that has nothing to do with your actual app. So I built vartheme . 🚨 The Problem With Dark Mode Today Most developers fall into one of these approaches: 1. Roll Your Own ❌ 200+ lines of code ❌ Breaks in SSR / Next.js ❌ Repeated effort every project 2. Use next-themes ✅ Good library ❌ Tied to Next.js ❌ No CSS variables ❌ No built-in UI 3. Use UI Library Themes ❌ Locked into their design system ❌ Limited flexibility 💡 What I Wanted A solution that: ✅ Works in any React setup (Vite, Next.js, Remix, CRA) ✅ Uses CSS variables ✅ Includes a beautiful toggle UI ✅ Is SSR safe ✅ Persists user preferences ⚡ Introducing vartheme A simple, flexible, and powerful theming solution for React. 🚀 Dark Mode in 1 Line npm i