next.js/test/development/basic/define-class-fields/fixture/tsconfig.json

{
  "compilerOptions": {
    "useDefineForClassFields": true,
    "esModuleInterop": true,
    "module": "esnext",
    "jsx": "preserve",
    "target": "es5",
    "lib": ["dom", "dom.iterable", "esnext"],
    "allowJs": true,
    "skipLibCheck": false,
    "strict": true,
    "forceConsistentCasingInFileNames": true,
    "noEmit": true,
    "incremental": true,
    "moduleResolution": "bundler",
    "resolveJsonModule": true,
    "isolatedModules": true
  },
  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx"],
  "exclude": ["node_modules"]
}