Not the parent, but the approach I've seen in React is to treat inline CSS as objects like "{ fontWeight: "bold", color: "#000" }". So to re-use it, you can either put it in a constant or make a component that applies the styles to an element (and maybe takes props to override them).
I was asking because doing this just looks like normal CSS, where you define a class and use it in multiple places, only that it's in JS instead, so you still have all the "problems" mentioned in the article.
The major downside of reused inline CSS is when you have to do minor tweaks (where active manipulation in the browser devtools is by far easier to find the right values) and those inline styles are on the page multiple times. Editing one class's rules is significantly easier than all the repeated inline styles.
