next.js/crates/next-core/js/tsconfig.json

{
  "compilerOptions": {
    // type checking
    "strict": true,
    "noFallthroughCasesInSwitch": true,
    "skipLibCheck": true,
    // interop constraints
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    // js support
    "allowJs": true,
    "checkJs": false,
    // environment
    "jsx": "react-jsx",
    "lib": ["ESNext", "DOM"],
    "target": "esnext",
    // modules
    "module": "node16",
    "moduleResolution": "node16",
    "resolveJsonModule": true,
    "types": ["next"],
    // emit
    "noEmit": true,
    "stripInternal": true
  },
  "include": ["src", "types"]
}