This simple demo app is part of an updated article on theCodeCampus blog.
The article can be found here.
This example uses Angular 7 and Material 2.
Follow this link.
My guess is your using Angular in combination with
Angular Material and you need a
sticky footer, which is under
given circumstances not well documented.
The footer supports a variable height.
The most important file is src/app/app.component.scss.
There you can find the scss rules to support a sticky footer.
Clone this project and run ng serve for a dev server. Navigate to http://localhost:4200/.