The resolve.alias feature in webpack is not working properly for third-party modules

Currently, I am facing an issue trying to integrate npm's ng2-prism with angular2-seed. The problem arises when importing angular2/http, which has recently been moved under @angular.

Even though I expected webpack's configuration aliases to handle this seamlessly, for some reason, the alias is not being picked up.

Below is the configuration, untouched from the seed:

In vendor.ts - the only file edited to include ng2-prism in the vendor bundle:

// Angular 2
import '@angular/platform-browser-dynamic';
import '@angular/platform-browser';
import '@angular/core';
import '@angular/http';
import '@angular/router-deprecated';

import 'ng2-prism';

The import in ng2-prism's source code appears straightforward (codeblock.component.d.ts:1:66):

import { AfterViewChecked, AfterContentChecked, ElementRef } from 'angular2/core';

The alias set up in webpack.config.js

(...)
resolve: {
    root: [ path.join(__dirname, 'src') ],
    extensions: ['', '.ts', '.js', '.json', '.css', '.html', '.less'],
    alias: {
     (...),
      'angular2/core': path.join(__dirname, 'node_modules', '@angular', 'core', 'index.js'),
     (...)
    }
  },
(...)

Upon logging the result, it shows that the correct absolute folder to resolve the alias was detected.

However, upon running npm start, I encounter the following error:

ERROR in [default] C:/workstation/simple-java-mail/src/main/webapp/node_modules/ng2-prism/src/codeblock.component.d.ts:1:66 Cannot find module 'angular2/core'.

Certainly, ng2-prism needs to update its dependencies, but this scenario could arise with any library at some point.

It remains unclear why the import cannot be resolved. Any insights on what could be missing?

Answer №1

I provided a response on GitHub regarding the issue at this link. The alias functionality is functioning, but there may be an issue with TypeScript not recognizing the types correctly. I have made updates to the repository to include the alias for types, although please note that it may not cover all API changes. Here is the commit link

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