docs: add readme

ocavue · ocavue · commit d18c88e41d4b · 2024-09-13T01:24:47.000+10:00
diff --git a/README.md b/README.md
@@ -2,6 +2,49 @@
 
 [![NPM version](https://img.shields.io/npm/v/astro-theme-toggle?color=a1b858&label=)](https://www.npmjs.com/package/astro-theme-toggle)
 
+Create a ripple-style theme toggle animation in your Astro project.
+
+## Installation
+
+```bash
+npm install astro-theme-toggle
+```
+
+## Usage
+
+1. In your `<head>`, import the `theme-style.astro` component:
+
+   ```astro
+   ---
+   import ThemeStyle from 'astro-theme-toggle/theme-style.astro';
+   ---
+   <head>
+     <meta charset="utf-8" />
+     <meta name="viewport" content="width=device-width,initial-scale=1" />
+     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
+     <ThemeStyle />
+     <!-- other head elements -->
+   </head>
+   ```
+
+2. Add a button to your `<body>` to toggle the theme:
+
+   ```astro
+   <button class="size-6" id="theme-toggle">
+     <span class="i-ph-sun dark:i-ph-moon size-6 inline-block"></span>
+   </button>
+   <script>
+     import { handleToggleClick } from 'astro-theme-toggle'
+     document
+       .getElementById('theme-toggle')
+       ?.addEventListener('click', handleToggleClick)
+   </script>
+   ```
+
+## Live Examples
+
+- [Astrobook](https://astrobook.com)
+
 ## License
 
 MIT
