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Error upon deployment

See original GitHub issue

Error in the logs

module initialization error

sls version: 1.32.0 serverless-plugin-warmup@3.6.1-rc.1

This was working before i upgraded to babel7

service: adcentre-invoices
frameworkVersion: ">=1.2.0 <2.0.0"

  - serverless-webpack # Use serverless-webpack plugin to transpile ES6/ES7
  - serverless-offline-ssm
  - serverless-offline
  - serverless-apigw-binary
  - serverless-domain-manager
  - serverless-plugin-warmup

  name: aws
  runtime: nodejs8.10
  region: ap-southeast-2
    folderName: "_warmup" # Name of the folder created for the generated warmup
    cleanFolder: true
    memorySize: 256
    name: ${self:custom.warmupLambdaName}
    schedule: "rate(5 minutes)" # Run WarmUP every 5 minutes
    timeout: 20
    prewarm: true # Run WarmUp immediately after a deployment
    types: #list of mime-types
      # - 'image/jpeg'
      # - 'text/html'
      - "application/pdf"
    webpackConfig: ./webpack.config.js
    includeModules: true
    packager: "npm"
      individually: true #Webpack compiles and optimizes each function individually,
      # removing unnecessary imports and reducing code sizes significantly


const slsw = require("serverless-webpack");
const nodeExternals = require("webpack-node-externals");
const Dotenv = require("dotenv-webpack");

module.exports = {
  entry: slsw.lib.entries,
  target: "node",
  // Generate sourcemaps for proper error messages
  devtool: "source-map",
  // Since 'aws-sdk' is not compatible with webpack,
  // we exclude all node dependencies
  externals: [nodeExternals()],
  mode: slsw.lib.webpack.isLocal ? "development" : "production",
  optimization: {
    // We no not want to minimize our code.
    minimize: false
  performance: {
    // Turn off size warnings for entry points
    hints: false
  plugins: [new Dotenv()],
  // Run babel on all .js files and skip those in node_modules
  module: {
    rules: [
        test: /\.js$/,
        include: __dirname,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
          options: {
            presets: ["@babel/preset-env"]


  "devDependencies": {
    "@babel/core": "^7.1.0",
    "@babel/plugin-transform-runtime": "^7.1.0",
    "@babel/preset-env": "^7.0.0",
    "@babel/register": "^7.0.0",
    "@pact-foundation/pact": "5.9.1",
    "@pact-foundation/pact-node": "^6.19.4",
    "artillery": "^1.6.0-22",
    "aws-sdk": "2.315.0",
    "babel-loader": "^8.0.0",
    "babel-plugin-istanbul": "5.0.1",
    "babel-plugin-source-map-support": "2.0.1",
    "body-parser": "^1.18.3",
    "chai": "4.1.2",
    "commitizen": "^2.10.1",
    "cors": "^2.8.4",
    "cross-env": "5.2.0",
    "cz-conventional-changelog": "^2.1.0",
    "dotenv": "^6.0.0",
    "eslint": "^5.6.0",
    "eslint-config-airbnb-base": "^13.1.0",
    "eslint-config-prettier": "^3.0.1",
    "eslint-plugin-import": "^2.14.0",
    "eslint-plugin-prettier": "^2.6.2",
    "express": "^4.16.3",
    "helmet": "^3.13.0",
    "husky": "0.14.3",
    "lint-staged": "7.3.0",
    "mocha": "5.2.0",
    "mocha-lcov-reporter": "1.3.0",
    "nock": "^10.0.0",
    "nodemon": "^1.18.3",
    "npm-run-all": "^4.1.3",
    "nyc": "^13.0.1",
    "prettier": "1.14.3",
    "prettier-eslint": "^8.8.2",
    "renovate-config-seek": "^0.3.0",
    "rimraf": "2.6.2",
    "serverless": "^1.30.0",
    "serverless-apigw-binary": "^0.4.4",
    "serverless-domain-manager": "^2.6.0",
    "serverless-offline": "^3.25.9",
    "serverless-offline-ssm": "^1.1.0",
    "serverless-plugin-warmup": "^3.6.1-rc.1",
    "serverless-webpack": "5.2.0",
    "sinon": "^6.0.0",
    "sinon-chai": "^3.0.0",
    "webpack": "^4.19.1",
    "webpack-node-externals": "1.7.2"


  "comments": false,
  "plugins": ["source-map-support", "@babel/plugin-transform-runtime"],
  "presets": [
        "debug": false,
        "targets": {
          "node": "8.10"
        "shippedProposals": true
  "env": {
    "test": {
      "plugins": ["istanbul"]

Issue Analytics

  • State:closed
  • Created 5 years ago
  • Comments:5 (1 by maintainers)

github_iconTop GitHub Comments

moonikercommented, Nov 21, 2019

@shavo007 what was the syntax you used to get this working with Express? Are you using serverless-http?

juanjoDiazcommented, Oct 17, 2018

You can check #73 and #

The problem is that webpack tries to process functions that it shouldn’t and there seems to be no way to avoid it. I hope that we can work with the serverless-webpack maintainers to solve it.

As an alternative, for now, you can configure webpack so it can use commonjs (a.k.a. require).

Read more comments on GitHub >

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