define path in tsconfig.app.json for angular project

Question

The project was generated via angular CLI. I have the following folder structure:

I want to define a path to a bar folder in tsconfig.app.json and import Car to Garage.

My tsconfig.app.json:

{
  "extends": "../tsconfig.json",
  "compilerOptions": {
    ...
    "baseUrl": "./",
    "paths" : {
      "@bar" : ["foo/bar"]
    },
    ...
  },
  ...
}

My Garage.ts:

import { Car } from "@bar/Car";
export class Garage {}

In garage.ts I have an error:

Cannot find module '@bar/car'.

Douglas

you will find this article helpful, it explains how and why use paths quite elaborately – Bilestone

@AngularInDepth.com, Thank you sir. I went through the article briefly, but still don't get it. Can you please give some insights on why the Car module can not be resolved in that particular example ? – Douglas

I've posted my answer – Bilestone

Answer 1

You need to define paths like that:

   "paths" : {
      "@bar/*" : [
          "foo/bar/*"
      ]
    },

For more information read

• Configuring TypeScript compiler

Bilestone

Thank you sir, it solved the original problem, however the editor (in my case VS code) still complains '[ts] Cannot find module '@bar/Car'.' – Douglas

@koryakinp, sorry, I'm not familiar with VSCode. Consider asking separate question – Bilestone

The trailing * in the path itself (foo/bar/*) was the crux in my case. – Meaning

Answer 2

Please do not forget to put the baseUrl first before adding the paths. I spent hours trying to figure out where I was wrong.

"baseUrl": "./",
"paths": {
  ...
}

Othella

Answer 3

I think this might work

    {
  "extends": "../tsconfig.json",
  "compilerOptions": {
    ...
    "baseUrl": "./",
    "paths" : {
      "@bar" : ["foo/bar"],
      "@environment/*": ["environments/*"],
        "@shared/*": ["app/_shared/*"],
        "@helpers/*": ["helpers/*"]
       //you can define multiple paths inside this 
    },
    ...
  },
  ...
}

and the question looks like duplicate of question

Killerdiller

Sorry, it was actually "paths" : { "@bar" : ["foo/bar"]}, – Douglas

edited my code to provide additional details@Douglas – Killerdiller

Answer 4

to stop the complain in VS code : CMD + SHIFT + P then type reload or Reload Project to stop the complain in webstorm : invalidating caches (File | Invalidate caches, Invalidate and restart)

Wedgwood