tsconfig.json

{
  "compilerOptions": {
    "target": "ESNext",
    "useDefineForClassFields": true,
    "module": "ESNext",
    "moduleResolution": "bundler",
    "resolveJsonModule": true,
    "allowJs": true,
    "checkJs": true,
    "isolatedModules": true,
    "noEmit": true,
    "strict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noFallthroughCasesInSwitch": true,
    "verbatimModuleSyntax": true,
    "skipLibCheck": true,
    "lib": ["ES2021", "DOM", "DOM.Iterable"],
    "types": ["svelte"],
    "baseUrl": ".",
    "paths": {
      "$lib/*": ["src/lib/*"]
    }
  },
  "include": ["src/**/*.ts", "src/**/*.svelte"]
}