tsconfig/legacy/monorepo

tsconfig/legacy/monorepo sets the same options as tsconfig/monorepo, written out in one file instead of an extends array.

Usage

{
  "extends": "@repobuddy/typescript/tsconfig/legacy/monorepo",
  "compilerOptions": {
    "outDir": "esm",
    "rootDir": "src"
  }
}

Use it when:

Your TypeScript version is older than 5.0, which added extends arrays.
A tool reads your tsconfig and cannot follow an extends array. The package readme names Astro’s tsconfig-resolver (withastro/astro#6918).

Options

None.

Source

{
  "compilerOptions": {
    "composite": true,
    "declaration": true,
    "declarationMap": true,
    "exactOptionalPropertyTypes": true,
    "forceConsistentCasingInFileNames": true,
    "isolatedModules": true,
    "module": "Node16",
    "newLine": "lf",
    "noPropertyAccessFromIndexSignature": true,
    "noUncheckedIndexedAccess": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "resolveJsonModule": true,
    "sourceMap": true,
    "strict": true,
    "target": "ES2020",
    "useDefineForClassFields": true
  }
}

Effective config

tsc --showConfig (TypeScript 7.0.2) prints the same compilerOptions for this file as for tsconfig/monorepo, including the four derived options moduleResolution: node16, moduleDetection: force, preserveConstEnums, and incremental.

Behavior

The two presets are kept in sync by hand. Nothing in the package checks that they match.
module: Node16 needs TypeScript 4.7 or later.