I wrote a function like this:

function clean() {
fsExtra.remove(sumoDir)
}

in a file named commands.js

I export this function in this way:

module.exports = {[...], clean: clean, [...]}

I need to call this function in an Angular TypeScript component that i used for my frontend.

First of all I created a module with

ng g m home

next I import my function in home.module.ts in this way:

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import * as commands from './../../../src/commands.js'


@NgModule({
declarations: [],
imports: [
CommonModule
]
})
export class HomeModule { }
export {commands}

And I imported it in my home.component.ts

import { Component, OnInit } from '@angular/core';
import {MatCheckboxChange} from "@angular/material/checkbox";
import {commands} from "./home.module"

@Component({
  selector: 'app-home',
  templateUrl: './home.component.html',
  styleUrls: ['./home.component.css']
      })

 export class HomeComponent implements OnInit {
  [...]
async clean(){
}
[...]
}

When I do a ng build the outpur is:

Warning: [...]/home.component.css exceeded maximum budget. Budget 2.00 kB was not met by 1.31 kB with a total of 3.31 kB.



Error: node_modules/recursive-copy/index.d.ts:1:23 - error TS2307: Cannot find module 'fs' or its corresponding type declarations.

1 import { Stats } from 'fs';
                        ~~~~


Error: node_modules/recursive-copy/index.d.ts:2:24 - error TS7016: Could not find a declaration file for module 'stream'. '[...]node_modules/stream/index.js' implicitly has an 'any' type.
  Try npm i --save-dev @types/stream if it exists or add a new declaration (.d.ts) file containing declare module 'stream';

2 import { Stream } from 'stream';

How can I fix it? or How can I import correctly my function?