Correct, it is documented. That's what documentation is - to list out and describe the API surface. The entire documentation block for that is prefixed with a

Correct, it is documented. That's what documentation is - to list out and describe the API surface. The entire documentation block for that is prefixed with a big yellow-box warning: > using the style attribute as the primary means of styling elements is generally not recommended. And then it links to https://reactjs.org/docs/faq-styling.html https://reactjs.org/docs/faq-styling.html which just says over and over again "use class names"