Error: Cannot find module '/var/task/src/app/lambda/puppeteer/lib/Browser

Environment

• puppeteer-core: “16.0.0”
• @sparticuz/chrome-aws-lambda: “16.0.0”
• OS: Mac
• Node.js Version: 16.x
• Lambda / GCF Runtime: nodejs16.x

Working great locally. I’ve created a lambda layer via:

git clone --depth=1 https://github.com/Sparticuz/chrome-aws-lambda.git cd chrome-aws-lambda make chrome_aws_lambda.zip

Uploaded the zip manually to a new layer via AWS console, and attached it (via serverless config below) to my lambda

I’m excluding the @sparticuz/** module during package/bundle so my lambda uses the layer version.

plugins:
  - serverless-esbuild

package:
  individually: true
  patterns:
    - '!node_modules/@sparticuz/**'

custom:
  esbuild:
    platform: node
    bundle: true
    external: ['knex', 'pg']

functions:
  api:
    handler: src/app/lambda/api.handler
    url: true
    layers:
      - arn:aws:lambda:eu-west-2:173514141284:layer:chrome-aws-lambda:2

and my function code is:

import chromium from '@sparticuz/chrome-aws-lambda'

browser = await chromium.puppeteer.launch({
  args: chromium.args,
  defaultViewport: chromium.defaultViewport,
  executablePath: await chromium.executablePath,
  headless: true,
  ignoreHTTPSErrors: true
})

but running it on lambda gives me a 500 with:

Error: Cannot find module '/var/task/src/app/lambda/puppeteer/lib/Browser'\nRequire stack:\n- /var/task/src/app/lambda/api.js\n- /var/runtime/index.mjs

[alexcroox]

OK finally got it working without bundling it in the lambda, but loading it from the layer;

const importPath = process.env.LAMBDA_TASK_ROOT
  ? '/opt/nodejs/node_modules/@sparticuz/chrome-aws-lambda/build/index.js'
  : '@sparticuz/chrome-aws-lambda'

const { default: chromium } = await import(importPath)

the build/index.js path is required for me because I’m using ESM and Lambda layers don’t support native ESM loading yet

package:
  individually: true
  patterns:
    - '!@sparticuz/**'

[alexcroox]

OK the package exclude idea wasn’t the solution, using esbuild you need to mark this entire lib as external:

custom:
  esbuild:
    platform: node
    bundle: true
    external: ['@sparticuz/chrome-aws-lambda']

EDIT: Spoke too soon, this bundles the binaries which makes for a huge package. I’ll keep trying to get it to use the lambda layer version