# Half Sun Theme Toggle

> An animated theme toggle with a half-sun rotation.

A shadcn/ui block from the [@toggles](https://toggles.dev) registry, listed on [shadcn.exchange](https://shadcn.exchange/r/toggles/half-sun).

- Page, with a live preview: https://shadcn.exchange/r/toggles/half-sun
- Screenshot: https://abzjhwgwpdpz7ua5.public.blob.vercel-storage.com/shots/toggles/half-sun-light-7b0b51c008499212.png
- Registry item: https://toggles.dev/r/half-sun.json
- Listed: 2026-10-13, source last changed 2026-10-13

## Install

```bash
npx shadcn@latest add https://toggles.dev/r/half-sun.json
```

Run it in a project that has shadcn/ui set up. It adds the files below and installs what they depend on.

## Files

### `src/HalfSun.tsx`

```tsx
import { type ButtonHTMLAttributes, type CSSProperties } from "react";

export interface HalfSunProps extends Omit<
  ButtonHTMLAttributes<HTMLButtonElement>,
  "children"
> {
  duration?: number;
  /** Whether the toggle should render in its dark-theme state. */
  toggled?: boolean;
  [key: `data-${string}`]: string | number | boolean | null | undefined;
}

export function HalfSun({
  duration = 500,
  toggled,
  className,
  type = "button",
  title = "Toggle theme",
  "aria-label": ariaLabel = "Toggle theme",
  "aria-pressed": ariaPressed,
  ...props
}: HalfSunProps) {
  return (
    <button
      {...props}
      type={type}
      title={title}
      aria-label={ariaLabel}
      aria-pressed={toggled ?? ariaPressed}
      className={[
        className,
        toggled === true ? "dark" : toggled === false ? "light" : undefined,
      ]
        .filter(Boolean)
        .join(" ")}
    >
      <svg
        width="1em"
        height="1em"
        viewBox="0 0 32 32"
        aria-hidden="true"
        fill={"currentColor"}
        style={
          { "--toggles-half-sun--duration": `${duration}ms` } as CSSProperties
        }
      >
        <path
          d={
            "M27.5 11.5v-7h-7L16 0l-4.5 4.5h-7v7L0 16l4.5 4.5v7h7L16 32l4.5-4.5h7v-7L32 16l-4.5-4.5zM16 25.4V6.6c5.2 0 9.4 4.2 9.4 9.4s-4.2 9.4-9.4 9.4z"
          }
          className="origin-center motion-safe:transition-transform motion-safe:duration-(--toggles-half-sun--duration) motion-safe:[transition-timing-function:ease] dark:rotate-180"
        />
      </svg>
    </button>
  );
}
```