How to mock jquery global $ with jasmine typescript?

Question

I want to test a method in a service that uses the global $ as jquery reference like this:

CLASSES_TO_FIND = ['highlight', 'normal'];


fetchHighlightedTags(): Array<HTMLElement> {
     const selectors = this.CLASSES_TO_FIND.map(s => '.' + s).join(', ');
     // keep only element not the jquery result Object
     const tags: Array<HTMLElement> = [];
     const elementsList = $(selectors); //part to mock
     elementsList.each(i => {
          tags.push(elementsList.get(i));
     });
     return tags;
}

I would like to mock the $() method, note that it is a scoped variable so there is no import.

describe('DocumentKeywordNavigatorService', () => { 
    
    let serviceToTest: ServiceToTest;
    
    const jqueryMock = () => { 
       console.log("I'm using the mock'");
    }

    beforeEach(() => {
       serviceToTest = new ServiceToTest();
       $ = jqueryMock;
    }) 
    
    it('test method', () => {
       results = serviceToTest.fetchHighlightedTags();
       //assert stuff
    });
}