Angular 12 aws-sdk 2.910.0 Error: Module not found: Error: Can't resolve 'util' in '.\.\.\node_modules\aws-sdk\lib'

Question

Prior to moving from Angular 11 to 12 the following error did not occur and the application was able to use the aws-sdk library to access my S3 buckets:

./node_modules/aws-sdk/lib/event_listeners.js:572:21-44 - Error: Module not found: Error: Can't resolve 'util' in 'S:\Source\sttutter-ui\node_modules\aws-sdk\lib'
Did you mean './util'?
Requests that should resolve in the current directory need to start with './'.
Requests that start with a name are treated as module requests and resolve within module directories (S:/Source/sttutter-ui, node_modules).
If changing the source code is not an option there is also a resolve options called 'preferRelative' which tries to resolve these kind of requests in the current directory too.

BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default.
This is no longer the case. Verify if you need this module and configure a polyfill for it.

If you want to include a polyfill, you need to:
        - add a fallback 'resolve.fallback: { "util": require.resolve("util/") }'
        - install 'util'
If you don't want to include a polyfill, you can use an empty module like this:
        resolve.fallback: { "util": false }

package.json

{
  "name": "x",
  "version": "0.0.0",
  "license": "commercial",
  "private": true,
  "engines": {
    "node": ">= 10.0.0"
  },
  "dependencies": {
    "@angular/animations": "~12.0.1",
    "@angular/common": "~12.0.1",
    "@angular/compiler": "~12.0.1",
    "@angular/core": "~12.0.1",
    "@angular/forms": "~12.0.1",
    "@angular/platform-browser": "~12.0.1",
    "@angular/platform-browser-dynamic": "~12.0.1",
    "@angular/router": "~12.0.1",
    "@ng-bootstrap/ng-bootstrap": "^9.1.1",
    "@ngrx/store": "^12.0.0",
    "aws-sdk": "^2.910.0",
    "ngrx-store-freeze": "^0.2.4",
    "ngrx-store-logger": "^0.2.4",
    "prando": "^6.0.1",
    "rxjs": "~6.6.0",
    "tslib": "^2.1.0",
    "zone.js": "~0.11.4"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~12.0.1",
    "@angular/cli": "~12.0.1",
    "@angular/compiler-cli": "~12.0.1",
    "@types/jasmine": "~3.6.0",
    "@types/node": "^12.11.1",
    "jasmine-core": "~3.7.0",
    "karma": "~6.3.0",
    "karma-chrome-launcher": "~3.1.0",
    "karma-coverage": "~2.0.3",
    "karma-jasmine": "~4.0.0",
    "karma-jasmine-html-reporter": "^1.5.0",
    "typescript": "~4.2.3"
  },
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "watch": "ng build --watch --configuration development",
    "test": "ng test"
  }
}

I've tried deleting the node_modules directory and running npm install

Search the web about this error seems to suggest that this is a webpack issue... Based upon these conversations I'm not sure how to get this working again.

Should I switch to aws-sdk-js even though aws-sdk was working up and until today?

Suggestions regarding how to resolve this issue sought

Thanks!

Answer 1

I have also run into this issue, and am not sure what the official path should be, but the below has worked for me.

1. npm install -S util
2. Add (window as any).global.util = (window as any).global.util || require("util").util; to your polyfills.ts file.

Answer 2

Angular 12 moved to Webpack 5 which does not include polyfills for node.js anymore.

To avoid adding missing polyfills on your own, use this Webpack plugin: https://www.npmjs.com/package/node-polyfill-webpack-plugin

It includes all polyfills which have been removed with Webpack 5.

Install the package and configure the Webpack plugin as described and the issue should be solved.