Angular/CSS: How to style a component based on a built-in component's styling?

Question

I am developing an Angular table library, and I have several components that can be used in place of the standard td or th elements. Currently, I am applying a style that applies to multiple of these components like so:

td,
elm-total-cell,
elm-editable-cell {
   border-bottom: $border;
}

Is there a cleaner way style these elements? I've had bugs pop up in cases where I forget to include the replacement component (i.e. let's say I forgot in the above example to include elm-total-cell). Ideally, if I apply a style to td, it would apply to all components that can be used in the place of td.