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# @tsconfig/node20
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@tsconfig/node20 provides a base TypeScript configuration optimized for Node.js 20 applications. It includes pre-configured compiler options with ES2023 library support, NodeNext module system, ES2022 target, strict type checking, and proper ES module interoperability.
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## Package Information
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- **Package Name**: @tsconfig/node20
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- **Package Type**: npm
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- **Language**: TypeScript Configuration
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- **Installation**: `npm install --save-dev @tsconfig/node20`
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## Core Imports
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TypeScript configuration packages are used through the `extends` mechanism in `tsconfig.json` files:
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```json
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{
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  "extends": "@tsconfig/node20/tsconfig.json"
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}
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```
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The package provides a single configuration file that can be extended in any TypeScript project. No direct code imports are required - the configuration is applied automatically by the TypeScript compiler.
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## Basic Usage
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Create or update your project's `tsconfig.json`:
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```json
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{
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  "extends": "@tsconfig/node20/tsconfig.json",
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  "compilerOptions": {
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    // Your additional options here
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    "outDir": "./dist",
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    "rootDir": "./src"
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  },
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  "include": [
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    "src/**/*"
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  ],
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  "exclude": [
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    "node_modules",
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    "dist"
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  ]
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}
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```
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Alternative installation via Yarn:
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```bash
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yarn add --dev @tsconfig/node20
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```
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## Architecture
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@tsconfig/node20 follows the TypeScript configuration inheritance model:
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- **Base Configuration**: Provides a foundation of Node.js 20 optimized compiler options
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- **Extension Mechanism**: Uses TypeScript's `extends` field to inherit configurations
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- **Composition Pattern**: Allows layering additional options on top of the base configuration
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- **Compiler Integration**: Integrates directly with the TypeScript compiler's configuration resolution system
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The architecture enables:
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- **Modular Configuration**: Separate base configurations from project-specific settings
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- **Inheritance Chain**: Multiple configurations can be extended in sequence
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- **Override Capability**: Project-specific options can override base configuration values
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- **Tool Compatibility**: Works with all TypeScript-compatible build tools and IDEs
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## Capabilities
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### Base Configuration Extension
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Extends the provided Node.js 20 optimized TypeScript configuration through the TypeScript `extends` mechanism.
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Usage in `tsconfig.json`:
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```json { .api }
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{
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  "extends": "@tsconfig/node20/tsconfig.json"
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}
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```
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The base configuration provides the following compiler options:
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```json { .api }
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{
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  "$schema": "https://json.schemastore.org/tsconfig",
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  "display": "Node 20",
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  "_version": "20.1.0",
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  "compilerOptions": {
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    "lib": ["es2023"],
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    "module": "nodenext",
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    "target": "es2022",
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    "strict": true,
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    "esModuleInterop": true,
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    "skipLibCheck": true,
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    "moduleResolution": "node16"
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  }
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}
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```
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### Compiler Options Configuration
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The package configures TypeScript for optimal Node.js 20 development:
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#### Library Support
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```json { .api }
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{
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  "lib": ["es2023"]
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}
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```
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Includes ES2023 standard library features for modern JavaScript functionality.
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#### Module System
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```json { .api }
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{
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  "module": "nodenext",
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  "moduleResolution": "node16"
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}
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```
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Configures Node.js ESM support with modern module resolution.
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#### Target Environment
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```json { .api }
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{
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  "target": "es2022"
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}
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```
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Targets ES2022 features compatible with Node.js 20.
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#### Type Safety
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```json { .api }
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{
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  "strict": true,
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  "esModuleInterop": true,
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  "skipLibCheck": true
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}
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```
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Enables strict type checking with ES module interoperability and optimized compilation.
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## Configuration Properties
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### Schema and Metadata
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```json { .api }
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{
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  "$schema": "https://json.schemastore.org/tsconfig",
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  "display": "Node 20",
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  "_version": "20.1.0"
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}
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```
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- **$schema**: JSON schema for TypeScript configuration validation
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- **display**: Human-readable configuration name
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- **_version**: Internal version tracking for the configuration
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### Compiler Options
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```json { .api }
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{
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  "compilerOptions": {
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    "lib": ["es2023"],
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    "module": "nodenext", 
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    "target": "es2022",
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    "strict": true,
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    "esModuleInterop": true,
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    "skipLibCheck": true,
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    "moduleResolution": "node16"
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  }
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}
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```
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- **lib**: ES2023 library includes for modern JavaScript features
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- **module**: NodeNext for full Node.js ESM support
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- **target**: ES2022 compilation target for Node.js 20 compatibility
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- **strict**: Strict type checking enabled
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- **esModuleInterop**: Simplified CommonJS/ESM interoperability
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- **skipLibCheck**: Skip declaration file type checking for faster builds
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- **moduleResolution**: Node16 resolution algorithm for modern module handling
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## Integration Patterns
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### Project Setup
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Typical project structure when using @tsconfig/node20:
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```
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project/
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├── src/
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│   ├── index.ts
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│   └── utils/
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├── tsconfig.json
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└── package.json
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```
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Example `tsconfig.json` extending the base configuration:
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```json
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{
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  "extends": "@tsconfig/node20/tsconfig.json",
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  "compilerOptions": {
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    "outDir": "./dist",
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    "rootDir": "./src",
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    "declaration": true,
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    "sourceMap": true
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  },
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  "include": ["src/**/*"],
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  "exclude": ["node_modules", "dist", "**/*.test.ts"]
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}
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```
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The `extends` field tells TypeScript to inherit all configuration options from @tsconfig/node20, then apply any additional or overriding options specified in the local configuration.
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### Build Integration
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Compatible with standard TypeScript build tools:
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```bash
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# Direct TypeScript compilation
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npx tsc
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# With build scripts in package.json
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npm run build
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```
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### Development Environment
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Works seamlessly with:
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- VS Code TypeScript language service
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- TypeScript-ESLint
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- Jest with TypeScript support
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- Node.js native ES modules
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- TypeScript project references
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## Error Handling
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### Configuration Validation
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The TypeScript compiler will validate the extended configuration and report errors for invalid options or conflicts.
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### Module Resolution Issues
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If module resolution fails, ensure your Node.js version supports the configured module system:
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- Node.js 20+ required for full NodeNext module support
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- ES modules require `.mjs` extension or `"type": "module"` in package.json for `.js` files
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### Common Integration Problems
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- **Strict Mode Errors**: The configuration enables strict type checking; existing code may need type annotations
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- **ES Module Compatibility**: Ensure dependencies support ES modules when using NodeNext module resolution
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- **Library Compatibility**: Some libraries may not include ES2023 types; consider `skipLibCheck: true` (already enabled)