capacitor-expert

これはレビュー時に保存された抜粋です。完全で最新の内容は外部ソースを確認してください。

---
name: capacitor-expert
description: "A comprehensive starting point for AI agents to work with Capacitor. Covers core concepts, CLI, app creation, plugins, framework integration, best practices, storage, security, testing, troubleshooting, upgrading, and Capawesome Cloud (live updates, native builds, app store publishing). Pair with the other Capacitor skills in this collection for deeper topic-specific guidance."
metadata:
  author: capawesome-team
  source: https://github.com/capawesome-team/skills/tree/main/skills/capacitor-expert
---

# Capacitor Expert

Comprehensive reference for building cross-platform apps with Capacitor. Covers architecture, CLI, plugins, framework integration, best practices, and Capawesome Cloud.

## Core Concepts

Capacitor is a cross-platform native runtime for building web apps that run natively on iOS, Android, and the web. The web app runs in a native WebView, and Capacitor provides a bridge to native APIs via plugins.

### Architecture

A Capacitor app has three layers:

1. **Web layer** -- HTML/CSS/JS app running inside a native WebView (WKWebView on iOS, Android System WebView on Android).
2. **Native bridge** -- Serializes JS plugin calls, routes them to native code, and returns results as Promises.
3. **Native layer** -- Swift/ObjC (iOS) and Kotlin/Java (Android) code implementing native functionality.

Data passed across the bridge must be JSON-serializable. Pass files as paths, not base64.

### Project Structure

```
my-app/
  android/                  # Native Android project (committed to VCS)
  ios/                      # Native iOS project (committed to VCS)
    App/
      App/                  # iOS app source files
      App.xcodeproj/
  src/                      # Web app source code
  dist/ or www/ or build/   # Built web assets
  capacitor.config.ts       # Capacitor configuration
  package.json
```

The `android/` and `ios/` directories are full native projects -- they are committed to version control and can be modified directly.

### Capacitor Config

`capacitor.config.ts` (preferred) or `capacitor.config.json` controls app behavior:

```typescript
import type { CapacitorConfig } from '@capacitor/cli';

const config: CapacitorConfig = {
  appId: 'com.example.app',
  appName: 'My App',
  webDir: 'dist',
  server: {
    // androidScheme: 'https', // default in Cap 6+
  },
};

export default config;
```

For details, see [App Configuration](https://github.com/capawesome-team/skills/blob/main/skills/capacitor-app-development/references/app-configuration.md).

## Creating a New App

### Quick Start

```bash
# 1. Create a web app (React example with Vite)
npm create vite@latest my-app -- --template react-ts
cd my-app && npm install

# 2. Install Capacitor
npm install @capacitor/core
npm install -D @capacitor/cli

# 3. Initialize Capacitor
npx cap init "My App" com.example.myapp --web-dir dist

# 4. Build web assets
npm run build

# 5. Add platforms
npm install @capacitor/android @capacitor/ios
npx cap add android
npx cap add ios

# 6. Sync and run
npx cap sync
npx cap run android
npx cap run ios
```

**Web asset directories by framework:**
- Angular: `dist/<project-name>/browser` (Angular 17+ with application builder)
- React (Vite): `dist`
- Vue (Vite): `dist`
- Vanilla: `www`

For the full guided creation flow, see [capacitor-app-creation](https://github.com/capawesome-team/skills/blob/main/skills/capacitor-app-creation/SKILL.md).

## Capacitor CLI

All commands: `npx cap <command>`. Most important commands:

| Command | Purpose |
| ------- | ------- |
| `npx cap init <name> <id>` | Initialize Capacitor in a project |
| `npx cap add <platform>` | Add Android or iOS platform |
| `npx cap sync` | Copy web assets + update native dependencies (run after every plugin install, config change, or web build) |
| `npx cap copy` | Copy web assets only (faster, no native dependency update) |
| `npx cap run <platform>` | Build, sync, and deploy to device/emulator |
| `npx cap run <platfor