How to develop locally using serverless offline

The article explains that serverless-offline lets Node.js developers emulate AWS Lambda and API Gateway on a local machine, so they can test changes without deploying every time. It says this improves logs, debugging, and team workflow, while keeping development local or in a shared environment.

Reading notes

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• The plugin starts a local HTTP server that handles request lifecycles and invokes handlers.
• The setup adds the serverless-offline package to a Node.js project and registers it in serverless.yml.
• Running serverless offline starts a local server that emulates AWS Lambda and API Gateway.
• An .env flag such as IS_OFFLINE can switch a Lambda client between a local endpoint and an AWS endpoint.
• The article shows invoking a Lambda locally with the AWS CLI against http://localhost:3002.
• The plugin provides a CLI with many options for ports, CORS, HTTPS, Docker, WebSocket settings, and other local configuration.
• The same options can also be set in serverless.yml, and CLI values override the file values.
• The guide then walks through creating a Fauna database, generating a security key, and creating an AWS Lambda function that queries a Fauna collection.
• The example uses the faunadb package, a client configured with the database secret, and a query against indexes/all_customers.
• The article closes by describing Fauna as a secure, scalable cloud API with native GraphQL and support for serverless, multiregional use.