TypeScript (ts) offers type safety which is helpful when working with the AWS SDK, which comes with ts definitions (d.ts)

You can compile the ts files in this directory by 1st installing typescript via

npm install -g typescript

then

npm i

You can then run the compiler by running tsc in this directory. It will pull the settings from .tsconfig and extra @types from package.json. The output create.js file is what will be uploaded by serverless.

For brevity, I have just demonstrated this to match with the todos/create.js lambda function