aws-lambda-typescript-integration

# AWS Lambda TypeScript Integration Patterns for creating high-performance AWS Lambda functions in TypeScript with optimized cold starts. ## Overview Two approaches for TypeScript Lambda: 1. **NestJS Framework** - Dependency injection, modular architecture, larger bundle (100KB+) 2. **Raw TypeScript** - Minimal overhead, smaller bundle (<50KB), maximum control Both support API Gateway and ALB integration. ## When to Use - Creating new Lambda functions in TypeScript - Optimizing cold start performance - Choosing between NestJS and minimal TypeScript - Configuring API Gateway or ALB integration - Setting up CI/CD for TypeScript Lambda ## Instructions ### 1. Choose Your Approach | Approach | Cold Start | Bundle Size | Best For | Complexity | |----------|------------|-------------|----------|------------| | NestJS | < 500ms | Larger (100KB+) | Complex APIs, enterprise apps, DI needed | Medium | | Raw TypeScript | < 100ms | Smaller (< 50KB) | Simple handlers, microservices, minimal deps | Low | ### 2. Project Structure #### NestJS Structure ``` my-nestjs-lambda/ ├── src/ │ ├── app.module.ts │ ├── main.ts │ ├── lambda.ts # Lambda entry point │ └── modules/ │ └── api/ ├── package.json ├── tsconfig.json └── serverless.yml ``` #### Raw TypeScript Structure ``` my-ts-lambda/ ├── src/ │ ├── handlers/ │ │ └── api.handler.ts │ ├── services/ │ └── utils/ ├── dist/ # Compiled output ├── package.json ├── tsconfig.json └── templ...