app/tsconfig.json

{
  // https://nuxtjs.org/concepts/typescript
  "extends": "./.nuxt/tsconfig.json",
  "compilerOptions": {
    "useDefineForClassFields": false,
    "esModuleInterop": true,
    "sourceMap": true,
    "experimentalDecorators": true,
    "types": [],
    "typeRoots": ["./types"]
  },
  "exclude": ["node_modules", ".nuxt"]
}