This is a horrible idea, and the article reads like the author has completely lost the notion that there is even a thing like CSS. Please just add margin-right

This is a horrible idea, and the article reads like the author has completely lost the notion that there is even a thing like CSS. Please just add margin-right to the icon that is already an actual targetable node in your DOM or skip the headache altogether by making your button display:grid & setting appropriate gutter width or something. But the proposed idea is nothing but a showcase of everything that's wrong with "styled components only" and where it might lead you.