app/tsconfig.json

{
  // https://v3.nuxtjs.org/concepts/typescript
  "extends": "./.nuxt/tsconfig.json",
  "useDefineForClassFields": false,
  "compilerOptions": {
    "esModuleInterop": true,
    "sourceMap": true,
    "experimentalDecorators": true,
    "types": [
      "@nuxtjs/date-fns"
    ],
    "exclude": [
      "node_modules",
      ".nuxt"
    ],
    "typeRoots": [
      "./types/types.d.ts",
      "./types/interfaces.d.ts",
      "./types/enums.d.ts"
    ]
  }
}