How to Start Typescript and Node.js AWS Function with Serverless

How to Start Typescript and Node.js AWS Function with Serverless

Learn how to sart Typescript and Node.js AWS function with Serverless. We will use the latest stable version of Serverless (2.35.0) to build a “simple” serverless project — A REST API with AWS Lambda function and API gateway. Enter the blog-serverless-backend-nodejs folder and run the npm.

In this article, we will talk about starting a project with Serverless and TypeScript. The article requires basic knowledge about AWS serverless architecture, the Serverless framework, and TypeScript.

We will use the latest stable version of Serverless (2.35.0) to build a “simple” serverless project — A REST API with AWS Lambda function and API gateway.

Requirements

  • Node.js (14.x version)
  • Serverless
$ mkdir ts-jest-serverless
$ cd ts-jest-serverless
$ npm install serverless --no-save

Install the serverless package with --no-save option to avoid creating package.json file. In the next part, we will use a template to initiate the project.

Typescript template

This is an easy way to initialize our project when we want to build the project with TypeScript.

$ npx serverless create --template aws-nodejs-typescript
$ npm install

Now we have some configuration files:

  • serverless.ts — Serverless config
  • tsconfig.paths.json and tsconfig.json — Typescript config
  • webpack.config.js — Webpack config

And we have and simple function — hello function.

Let’s update the project’s information in package.json and serverless.ts file if necessary.

“Strong type” for function definition. As you can see, the hello function definition is exported as an object without type, we can’t use the Typescript suggestion and type check feature right here. Let’s export AWSFunction as a common type in src/libs/lambda.ts

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