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This is of interest to me too. I tried this, and I got a different error (Cannot find module '@mypath'), though it works in VSCode. I tried turning off the built-in typescript (Pulumi.yaml, runtime options typescript: false) and compiling myself, but no change.

my solution is:

"_moduleAliases": {
    "@application": "src/application",
    "@config": "src/config",
    "@domain": "src/domain",
    "@interfaces": "src/interfaces",
    "@api-route": "src/api-route"
  },

Does that require the module-alias module? Instead of the built-in path aliases?

I implemented it using the

"module-alias": "^2.2.2"

Good stuff. I moved the "path" section out of "compilerOptions" to the top level, renamed it to "_moduleAliases", removed the arrays (leaving just the paths), and added "module-alias/register" to my .mocharc.json require property. No joy 😞 "Cannot find module" errors...

@little-cartoon-10569 steps to follow:

npm i --save module-alias

in the

tsconfig.json

you define your paths: In my case

"compilerOptions": {
    "baseUrl": "./src",
    "paths": {
      "@application/*": ["application/*"],
      "@config/*": ["config/*"],
      "@domain/*": ["domain/*"],
      "@api-route": ["api-route.ts"],
      "@interfaces/*": ["interfaces/*"]
    },

in the

package.json

you define the

_moduleAliases

in my case

"_moduleAliases": {
    "@application": "src/application",
    "@config": "src/config",
    "@domain": "src/domain",
    "@interfaces": "src/interfaces",
    "@api-route": "src/api-route"
  },

now in the

index.ts

(in my case is

handler.ts

) you add

import "module-alias/register";

Hmm, I did that, still complained...

the baseURL is usually at the level of tsconfig.ts

my-project
    -- src
        -- index.ts
        -- folder1
        -- folder2
        ...
    -- tsconfig.ts
    ...

I see that your tsconfig.ts refers to ./src, but in your folder structure, that would be ../src...?

I have a

entry.ts

file which my package.json points to. it has

const path = require('path')
const tsConfig = require(__dirname + '/../../../tsconfig.base.json')
const tsConfigPaths = require('tsconfig-paths')
const args = {
    baseUrl: path.resolve(__dirname + '/../../..'),
    paths: tsConfig.compilerOptions.paths,
}
tsConfigPaths.register(args)

module.exports = require('./index')

I have a roll-my-own monorepo. Might look into NX. Though I see all those `require()`s and think.. esnext, es2020, ...

index.ts and down is all esmodules