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Can't resolve 'stream'

See original GitHub issue

What is wrong?

Installing brain.js via npm in an angular framework doesn’t work. Error:

ERROR in ./node_modules/brain.js/dist/train-stream.js
Module not found: Error: Can't resolve 'stream' in '../node_modules/brain.js/dist'

Where does it happen?

When running npm start

How do we replicate the issue?

Fresh Project with Angular 7.1.4
npm install brain.js
npm start

How important is this (1-5)?

Expected behavior (i.e. solution)

Brain.js shouldn’t throw this error

Other Comments

Issue Analytics

State:
Created 5 years ago
Comments:9 (4 by maintainers)

Top GitHub Comments

3reactions

robertleeplummerjrcommented, Jan 5, 2019

Add this to tsconfig.json (found https://github.com/Stuk/jszip/issues/524):

{
  "compilerOptions": {
    "paths": {
      "stream": ["./node_modules/readable-stream/readable.js"]
    }
  }
}

Add this to polyfill.ts (found partly https://github.com/algolia/algoliasearch-client-javascript/issues/691, and above, ty @jordyvanderhaegen):

const w = (window as any);
w.process = {
  env: { DEBUG: undefined },
};
w.Buffer = [];
w.process = { env: { DEBUG: undefined }, version: [] };
w.global = w;

I installed this locally and was able to have the app simply work.

3reactions

jordyvanderhaegencommented, Jan 5, 2019

Ran into the same issue, got it temporarily fixed by adding the following to my index.html :

<script> var global = global || window; var Buffer = Buffer || []; var process = process || { env: { DEBUG: undefined }, version: [] }; </script>

https://stackoverflow.com/questions/50356408/upgrading-to-angular-6-x-gives-uncaught-referenceerror-global-is-not-defined