015/front/tsconfig.json

{
  // https://nuxt.com/docs/guide/concepts/typescript
  "extends": "./.nuxt/tsconfig.json",
  "compilerOptions": {
    // Other options...
    "lib": [
      // Other libs...
      // Add this! Doing so adds WebWorker and ServiceWorker types to the global.
      "webworker"
    ],
  },
}