Arc

Eclipse

The next appearance crosses the page like an eclipse.

pnpm dlx shadcn@latest add @uiarc/theme-switch-eclipse
Try the transition
  • Marketing or showcase pages where the theme change should feel like an event.
  • Layouts where a directional sweep across the page reads naturally.
  • Use theme-switch-rise for everyday product chrome where a calmer change fits.
  • Use theme-switch-split when the button sits in the center and direction should not matter.

Installation

Add Eclipse with the shadcn CLI, or copy the source by hand.

pnpm dlx shadcn@latest add @uiarc/theme-switch-eclipse

Adds the component and its local dependencies, and installs motion, lucide-react. First time? Add the @uiarc registry to components.json, or use the full URL:

example.tsx
import { ThemeSwitch } from "@/registry/components/theme-switch/theme-switch"; <ThemeSwitch  theme={theme}  variant="eclipse"  onThemeChange={(next, variant, trigger) => runThemeTransition(next, variant, trigger)}/>

Examples

3 more in theme. Each has its own page with install and API details.

Theme switcher

Four smooth ways to move between light and dark appearance.

Open page

Split

The next appearance opens from a slim center seam.

Open page

Rise

The next appearance rises into place.

Open page

ThemeSwitch

A secondary Button that swaps a sun and moon icon and reports the next theme. The page transition itself is yours to run.

PropTypeDefaultDescription
themeRequired"light" | "dark"–The current theme. Drives the icon and aria-pressed.
onThemeChangeRequired(next: Theme, variant: ThemeSwitchVariant, trigger: HTMLElement) => void–Called on press with the opposite theme, the variant, and the button, so the page transition can start from it.
variant"reveal" | "eclipse" | "split" | "rise""reveal"Names the page transition and sets the small icon nudge that matches it.
labelstring–Accessible name. Defaults to "Switch to dark mode" or "Switch to light mode".
iconOnlybooleanfalseHides the "Switch theme" text and renders a 38px square button.
EnterorSpace
Toggles the theme.
  • Same button as theme-switch: aria-pressed reflects dark mode and the label names the next theme.
  • Keep the eclipse sweep off for reduced motion and swap the theme directly.
  • variant="eclipse": the next appearance crosses the page like an eclipse; run it in onThemeChange with a view transition.
  • The icon shifts 2px left in dark mode to lean into the sweep.
  • Reduced motion removes the nudge and swaps the icon with a fade.
  • The labelled button fits a desktop top bar; pass iconOnly for a fixed 38px square on narrow headers and mobile.
  • Hover styles apply only on hover-capable fine pointers, so touch taps do not leave a stuck hover state.
  • The button itself is tiny: one icon swap on a spring, and the first theme after hydration applies without animating.
  • The page transition is yours; a full-page view transition snapshots the whole document, so keep it short and skip it for reduced motion.

Notes for AI

Give your coding assistant the Markdown reference instead of screenshots.

  • Select with variant="eclipse". The prop only styles the icon nudge and is passed back to onThemeChange; the page animation is your code.
  • Pick eclipse for a dramatic, directional change on marketing or showcase pages; rise suits product chrome better.
/components/theme-switch-eclipse/markdown

The full library index for assistants is at /llms.txt.

Theme switcherComponentFour smooth ways to move between light and dark appearance.SplitComponentThe next appearance opens from a slim center seam.RiseComponentThe next appearance rises into place.