Environment Variables Example - Fastify Typing CST Test
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Environment Variables Example — Fastify Code
Access environment variables in Fastify.
require('dotenv').config()
const fastify = require('fastify')({ logger: true })
const port = process.env.PORT || 3000
fastify.get('/', async (request, reply) => {
return `Server running on port ${port}`
})
fastify.listen({ port }, (err, address) => {
if (err) throw err
console.log(`Server running at ${address}`)
})Fastify Language Guide
Fastify is a high-performance, low-overhead web framework for Node.js. It emphasizes speed, schema-based validation, and a developer-friendly plugin system for building APIs and backend services.
Primary Use Cases
- ▸Building RESTful and JSON APIs
- ▸High-performance backend for web/mobile apps
- ▸Microservices architecture
- ▸Server-side processing for IoT or real-time systems
- ▸Integrating with TypeScript for strongly-typed APIs
Notable Features
- ▸Extremely fast HTTP handling
- ▸JSON schema validation & serialization
- ▸Built-in logging with Pino
- ▸Plugin architecture for modular design
- ▸Supports asynchronous hooks and lifecycle events
Origin & Creator
Fastify was created by Matteo Collina and Tomas Della Vedova in 2017 as a modern, high-performance alternative to Express.js.
Industrial Note
Fastify is preferred for high-performance APIs, microservices, and backend systems where speed, schema validation, and low overhead are critical.