OpenWhisk - how to use an EcmaScript Module (ESM) in node.js

index.cjs

// ///////////////////////////////////////////////////////////////////
// index.cjs - this is exported in the manifest for Openwhisk Deploy
// Only supported in Node 14+ (dynamic import)

async function cjsMain(params) {
  const { default: esmMain } = await import('./index.mjs')
  return esmMain(params)
}

exports.main = cjsMain

index.mjs

// //////////////////////////////////////////////////////////////////////////
// index.mjs - this is the EcmaScript Module that contains the functionality

export default function (params) {
  return {
    statusCode: 200,
    headers: {
      'Content-Type': 'application/json'
    },
    body: {
      LOG_LEVEL: params.LOG_LEVEL,
      message: 'this is a test message'
    }
  }
}