tsconfig.app.json

{
  "compilerOptions": {
    // Compilation target — ES2022 matches Vite's default esbuild target
    "target": "ES2022",
    "useDefineForClassFields": true,

    // Module settings — "bundler" is the correct mode for Vite 5
    "module": "ESNext",
    "moduleResolution": "bundler",
    "moduleDetection": "force",

    // Browser environment libs
    "lib": ["ES2022", "DOM", "DOM.Iterable"],

    // Vue SFC support
    "jsx": "preserve",

    // Allow importing .ts extensions explicitly (required when allowImportingTsExtensions is true)
    "allowImportingTsExtensions": true,

    // Allow .js files in src/ (main.js, router/index.js, etc.)
    "allowJs": true,

    // Resolve JSON imports
    "resolveJsonModule": true,

    // Required for Vite — each file is transpiled independently
    "isolatedModules": true,

    // Vite handles compilation; TS is for type-checking only
    "noEmit": true,

    // Path alias matching vite.config.js resolve.alias
    "baseUrl": ".",
    "paths": {
      "@/*": ["./src/*"]
    },

    // --- Performance ---
    // Skip type-checking of .d.ts in node_modules (biggest single perf win)
    "skipLibCheck": true,
    // Cache incremental build info to speed up subsequent checks
    "incremental": true,
    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",

    // --- Strictness ---
    "strict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noFallthroughCasesInSwitch": true,
    "exactOptionalPropertyTypes": true
  },
  "include": [
    "src/**/*.ts",
    "src/**/*.tsx",
    "src/**/*.vue",
    "src/**/*.js"
  ],
  "exclude": ["node_modules", "dist", "dist-electron", "electron"]
}