Nextjs Darkmode

     !npm bundle size 

Nextjs Darkmode is a versatile library crafted to fully utilize React 18 server components, ensuring a seamless dark mode experience in Next.js applications. Lightweight and efficient, it respects both user preferences and system settings through the prefers-color-scheme media query, and integrates effortlessly with React/Vite, Remix, and Next.js.

Motivation

The nextjs-themes library was initially created to achieve a similar functionality to next-themes with React Server Components. While effective, it felt bulky for those supporting only dark/light mode. Thus, nextjs-darkmode-lite was developed to offer a minimal footprint while utilizing Next.js Server Components, avoiding any flash of unthemed content, and ensuring theme synchronization with the server.

> For migration guide please refer Project Wiki

Features

- ✅ Simple API to toggle between dark and light modes

- ✅ Perfect dark mode with just 2 lines of code

- ✅ Compatible with Tailwind CSS, StyledComponents, emotion, Material UI, ...

- ✅ Secure by design - we support nonce when you want to apply Content Security Policy

- ✅ Fully treeshakable (e.g., import from nextjs-darkmode-lite/hooks)

- ✅ Full TypeScript support

- ✅ Utilizes React 18 Server components

- ✅ Compatible with all React 18 build systems/tools/frameworks

- ✅ System setting with prefers-color-scheme

- ✅ Supports Next.js 13 & 14 appDir

- ✅ No flash on load (supports SSG, SSR, ISG, and Server Components)

- ✅ Sync theme across tabs and windows

- ✅ Apply custom transitions when changing themes

- ✅ Manipulate theme via the useMode hook

- ✅ Comprehensive documentation with Typedoc

Feel free to request new features, discuss, or report bugs.

Please consider starring this repository and sharing it with your friends.

Getting Started

$3

``bash
$ pnpm add nextjs-darkmode-lite
`

_or_

`bash
$ npm install nextjs-darkmode-lite
`

_or_

`bash
$ yarn add nextjs-darkmode-lite
`

$3

> PLease make sure you set "moduleResolution" to "Bundler", "Node16" or "NodeNext" in your tsconfig file for export field in package.json to work properly. (Ref)[https://stackoverflow.com/a/74462490/23175171]

> You may need to import styles from nextjs-darkmode-lite/dist/index.css depending on your bundler configuration.

Import styles globally or within layout component.

`css
/ globals.css /
@import "nextjs-darkmode-lite/css";
`

`tsx
// layout.tsx
import "nextjs-darkmode-lite/css";
`

$3

For a lighter version, use nextjs-darkmode-lite-lite:

![npm bundle size](https://www.npmjs.com/package/nextjs-darkmode-lite-lite) ![Version](https://www.npmjs.com/package/nextjs-darkmode-lite-lite) ![Downloads](https://www.npmjs.com/package/nextjs-darkmode-lite-lite)

`bash
$ pnpm add nextjs-darkmode-lite-lite
`

_or_

`bash
$ npm install nextjs-darkmode-lite-lite
`

_or_

`bash
$ yarn add nextjs-darkmode-lite-lite
`

> You need r18gs as a peer-dependency.

Usage

> Please explore examples and packages/shared-ui for more working examples. (updates coming soon...)

$3

Modify _app to add dark mode support:

`js
import { Core } from "nextjs-darkmode-lite"; // for better tree-shaking
import { Switch } from "nextjs-darkmode-lite/switch";

function MyApp({ Component, pageProps }) {
return (
<>







);
}

export default MyApp;
`

⚡🎉Boom! Just a couple of lines and your dark mode is ready, complete with a color switch for user preferences. Check out examples for advanced usage.

> For vite or any other build tool, find a similar root component, e.g., in CRA and vite.

$3

Update app/layout.jsx to add Core component.

`tsx
// app/layout.jsx
import { Core } from "nextjs-darkmode-lite"; // for better tree-shaking

export default function Layout({ children }) {
return (




{children}


);
}
`

$3

An elegant color switch to toggle color schemes:

`tsx

`

$3

Fully support dark mode, including system preference with prefers-color-scheme. The dark/light mode is synced between tabs and modifies the className and data-attributes on the html elemnt.

`css
:root {
--background: white;
--foreground: black;
}

.dark {
--background: black;
--foreground: white;
}

/ or /

[data-rm="dark"] {...}
`

#### Using the data-attributes

data-attributes are very helpful when you want to customize styles in a CSS module file (styles.module.css)

data-rm -> Resolved Mode

data-m -> User's preference

data-sm -> System preference

#### Content Security Policy

If you are using CSP rules for CSS files, you can pass nonce argument to the Core component. If nonce is not supplied transition styles will not be applied. This may allow patched transitions throught the page in some cases.

`tsx

`

$3

Show different images based on the current theme:

`ts
import Image from "next/image";
import { useMode } from "nextjs-darkmode-lite/hooks";

function ThemedImage() {
const { resolvedMode } = useMode();
let src;

switch (resolvedMode) {
case "light":
src = "/light-mode-image.png";
break;
case "dark":
src = "/dark-mode-image.png";
break;
default:
src = "/default-image.png";
break;
}

return ;
}
`

$3

The useMode hook provides mode information:

`js
import { useMode } from "nextjs-darkmode-lite";

const ThemeChanger = () => {
const { resolvedMode, setMode } = useMode();

return (



);
};
`

useMode hook returns the following object:

`ts
export interface UseModeInterface {
mode: ColorSchemePreference;
systemMode: ResolvedScheme;
resolvedMode: ResolvedScheme;
setMode: (mode: ColorSchemePreference) => void;
}
`

$3

Apply appropriate class names and data attributes to force a mode for the page:

`tsx
export default function Page() {
return

;
}
`

$3

Next Themes works with any library. For example, with Styled Components:

`js
// pages/_app.js
import { createGlobalStyle } from "styled-components";
import { Core } from "nextjs-darkmode-lite";

// Your theming variables
const GlobalStyle = createGlobalStyle
:root {
--fg: #000;
--bg: #fff;
}

[data-rm="dark"] {
--fg: #fff;
--bg: #000;
}
;

function MyApp({ Component, pageProps }) {
return (
<>




);
}
`

$3

In tailwind.config.js, set the dark mode property to class:

`js
// tailwind.config.js
module.exports = {
darkMode: "class",
};
`

Now you can use dark-mode specific classes:

`tsx



`

Performance

nextjs-darkmode-lite is designed to be fully tree-shakable, including only the code you use. For instance, if you only use the useMode` hook, the rest of the library's code will be removed during the build process.

Contributing

We welcome contributions! Check out the Contributing Guide for more details.

$3

Explore hands-on courses to get started with Turborepo:

- React and Next.js with TypeScript
- The Game of Chess with Next.js, React, and TypeScript

!Repo Stats

License

MPL-2.0

Feel free to use, modify, and distribute this library under the MPL-2.0 license.

Please consider enrolling in our courses or sponsoring our work.

---

with 💖 by Mayank Kumar Chaudhari