I'm not sure how familiar with it you are, but that's kinda a result of flux/redux architecture. There's a global state that things are passed props to. If ther

I'm not sure how familiar with it you are, but that's kinda a result of flux/redux architecture. There's a global state that things are passed props to. If there is some change triggered as the result of a component being mounted, say a globalish "there's now a tooltip active", that may modify components including the component that triggered the change. That's probably a simplistic example, but it really does happen.