How to attach an external JS file to a specific Angular component and access its methods?

Question

Angular

If the JS file is in the local folder, then there is no problem. But if you're remote, it doesn't work.
I tried to connect files through the service - the code works, but Lint gives errors.

ngOnInit() {
   this.myService.loadJS('myRemoteJsFileName').then(data => {   
   methodInRemoteJsFile();  // здесь ошибка.   проект не соберётся 
}