How to make a class available for type designation in any project file?

Question

typescript

There is a Dom.ts file which contains the DomElement class and there are many other class files in which the constructor accepts an instance of the DomElement class or methods accept/return it. And I have to import it in all these files, just to specify the type. Is there any other option?

I don't understand how .d.ts files work.
I declared in such a file and this type became available throughout the project. How to do the same with a class? type EventType = 'click' | 'input' | 'mousedown'

Answer 1

1. Describe interfacein file.d.ts
   
2. In the place where you implement the class, add
   

   - class DomElement {
   + class DomElement implements [Название интерфейса] {
      // код класса
    }

   
   
3. For the rest of the project, use the name of the interface