ERROR TypeError: Cannot read property 'jquery' of undefined how to win?

Question

JavaScript

I am doing a study project. Stupidly according to the instructions. I'm trying to display errors using the materialize-css library. I work with Angular.
I connect through a static method in the class.

declare var M
export class MaterialService {
  static toast(message: string) {
    M.toast({html: message});
  }
}

Then I use it in the required component.
An error appears with the track as in the picture

Maybe someone will immediately see some of my jambs?

Answer 1

At the end of the line with an error is written where it occurred.
And you can click on this link.
You have some variable not defined there.