tsconfig.json

{
  "extends": "@tsconfig/recommended/tsconfig.json",
  "compilerOptions": {
    "target": "es6",
    "lib": ["dom", "dom.iterable", "esnext"],
    "module": "esnext",
    "moduleResolution": "node",
    "strict": true,
    // As of TypeScript 4.3, 'strict' enables these 8 compiler options.
    // "alwaysStrict": true,
    // "noImplicitAny": true,
    // "noImplicitThis": true,
    // "strictBindCallApply": true,
    // "strictFunctionTypes": true,
    // "strictNullChecks": true,
    // "strictPropertyInitialization": true,
    // "useUnknownInCatchVariables": true,

    "noFallthroughCasesInSwitch": true,
    "noImplicitReturns": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "allowSyntheticDefaultImports": true,
    "forceConsistentCasingInFileNames": true,

    "suppressImplicitAnyIndexErrors": false,

    "allowJs": true,
    "skipLibCheck": true,
    "noEmit": true,
    "esModuleInterop": true,
    "resolveJsonModule": true,
    "isolatedModules": true,
    "jsx": "preserve",
    "sourceMap": true,
    "removeComments": true,
    "baseUrl": ".",
    "declaration": true,
  },
  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", "**/*.js"],
  "exclude": ["node_modules"]
}