Ink Theme Switch, animated React component

A dark-mode toggle where the dark version of a settings panel pours out of the switch as a growing ink circle and drains back in when you switch off. The sun pulls in its rays and turns into a crescent moon, and only the component's own panel is themed.

Pro
Inputs & Controls
Spring

Play with it

Move the controls and watch it change. Copy code gives you a snippet with only the props you changed.

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Props

Prop	Type	Default	What it does
defaultDark	boolean	false	Start with the panel dark. Only the component's own panel is themed; the page theme is never touched.
onChange	(dark: boolean) => void	—	Called with the new value when the user flips the switch.
autoplay	boolean	false	Flips between light and dark every 2.2s until someone touches it.
className	string	—	Extra classes for the panel.

Add it to your project

Prepare your project

You need Tailwind CSS and the @/import alias. If shadcn isn't set up yet, initialise it once:

npx shadcn@latest init

Then add the Nexus registry to your components.json (the registries key is the part that matters):

{
  "$schema": "https://ui.shadcn.com/schema.json",
  "style": "default",
  "rsc": true,
  "tsx": true,
  "tailwind": {
    "css": "src/app/globals.css",
    "baseColor": "neutral",
    "cssVariables": true,
    "prefix": ""
  },
  "aliases": {
    "components": "@/components",
    "utils": "@/lib/utils",
    "ui": "@/components/ui",
    "lib": "@/lib",
    "hooks": "@/hooks"
  },
  "registries": {
    "@nexus-labs": "https://www.nexus-ui.com/api/registry/{name}"
  }
}

2
Add the component
Run this from your project root. It adds the component, the utilities it uses and its packages.
```
npx shadcn@latest add @nexus-labs/ink-theme-switch
```
3
Check what was added
With the standard aliases, these files land in your project:
components/
ink-theme-switch/
index.ts
ink-theme-switch.tsx
4
Copying by hand? Install the packages
Skip this if you used the command above.
```
npm install framer-motion
```

Use it in a page

Import it and render it. The Code tab above has the full example.

// app/page.tsx
import { InkThemeSwitch } from "@/components/ink-theme-switch";

export default function Page() {
  return (
    <main>
      <InkThemeSwitch />
    </main>
  );
}

Ink Theme Switch, animated React component

Play with it

Props

More inputs & controls