How to implement serverless functions in Node.js on cloud platforms?

To implement serverless functions in Node.js on cloud platforms, write your function to handle incoming events or requests, then deploy it to services like AWS Lambda, Azure Functions, or Google Cloud Functions. These platforms automatically manage scaling, infrastructure, and availability.

Serverless functions are small, stateless pieces of code triggered by events like HTTP requests, schedules, or messages. Each invocation runs in isolation, without relying on previous executions or local storage, which makes scaling effortless. Frameworks like Serverless Framework streamline packaging and deploying these Node.js functions, smoothing the development workflow and handling infrastructure concerns automatically.

Code

// AWS Lambda example
exports.handler = async (event) => {
  return {
    statusCode: 200,
    body: JSON.stringify({ message: 'Hello from Lambda!' }),
  };
};