Typescript with SystemJS: Cannot find own module

Question

I developed an module and now I want to take this module out of the app and into node_modules. But there is an error error TS2307: Cannot find module 'bipartite-graph'. where bipartite-graph is my own module.

This is my systemjs.config.ts:

SystemJS.config({
  packages: {
    app: {
      main: './app.js',
      defaultExtension: 'js'
    },
    'bipartite-graph': {
      main: './bipartite-graph.js',
      defaultExtension: 'js'
    },
    'rxjs': {
      defaultExtension: 'js'
    }
  },
  map: {
    app: 'app',

    'rxjs': 'node_modules/rxjs',

    'bipartite-graph': 'app/bipartite-graph'
  }
});

And this is the app.ts:

import { Subject } from 'rxjs/Subject';
import BipartiteGraph from 'bipartite-graph';

let subject: Subject<boolean> = new Subject<boolean>();
let bg = new BipartiteGraph([35, 50, 40], [45, 20, 30, 30], [[8, 6, 10, 9], [9, 12, 13, 7], [14, 9, 16, 5]]);

const n = 3, m = 4;

let i = 1, j = 1;
while (i <= n && j <= m) {
  bg.setAmount(i, j, Math.min(bg.getCapacity(i), bg.getDemand(j)));
  bg.setCapacity(i, bg.getCapacity(i) - bg.getAmount(i, j)); bg.setDemand(j, bg.getDemand(j) - bg.getAmount(i, j));
  if (bg.getCapacity(i) === 0) {
    i = i + 1;
  } else {
    j = j + 1;
  }
}

bg.draw();

The project transpiles and the final app works without errors but Webstorm und tsc throw the error. I imported rxjs to compare but I can't find a crucial difference. What am I missing? I tried to put the module into node_modules and changed the path in systemjs.config.ts but it didn't help. The whole project can be found on project.

Kalle · Accepted Answer · 2017-01-21 22:22:44Z

1

The typescript compiler does not find your bipartite-graph module because it's not reading your systemJS config. You have to add a tsconfig.json file, if not already there, with the baseUrl and path options set.

{
  "compilerOptions": {
    "baseUrl": ".",
    "paths": {
      "bipartite-graph": ["app/bipartite-graph"],
      ...other path mappings
    }
  }
}

more on this topic can be found in the official documentation: https://www.typescriptlang.org/docs/handbook/module-resolution.html

answered Jan 21, 2017 at 22:22

Kalle

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