...It also includes examples on how to develop a Lambda function in JavaScript as well as packaging and running an example Hello World file in JavaScript for your Greengrass core. The environment where Greengrass is running on needs to be able to run NodeJS 12.x applications. Unzip the SDK into your node_modules folder of your function. This should create a aws-greengrass-core-sdk folder which includes the SDK. Your console.log operation will be logged as INFO. A console.error operation will be logged as error. Currently, our NodeJS SDK only allows you to log at info or error level only.