So for example I want to use a cottonjs (dont have a d.ts file) library. And in angular.json O twice write

 "scripts": ["../node_modules/cottonjs/cotton.js"]

and in my component I tried to declare it

import {Component, OnInit} from '@angular/core';
declare var Cotton:any;

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit{
  ngOnInit() {
    console.log(Cotton)
  }
}

But every time when I tried to use some libraries in console I see this:

ERROR ReferenceError: Cotton is not defined
    at AppComponent.ngOnInit (app.component.ts:11:17)
    at callHook (core.mjs:2542:1)
    at callHooks (core.mjs:2511:1)
    at executeInitAndCheckHooks (core.mjs:2462:1)
    at refreshView (core.mjs:9501:1)
    at renderComponentOrTemplate (core.mjs:9600:1)
    at tickRootContext (core.mjs:10854:1)
    at detectChangesInRootView (core.mjs:10879:1)
    at RootViewRef.detectChanges (core.mjs:21491:1)
    at ApplicationRef.tick (core.mjs:26563:1)

P.s dont work there too Heeeeeeeelp please