I'd take that point further and state that React is in no competition with anything.

React was invented because Facebook had very interactive/stateful UI as well as large teams of developers working on the same codebase. The then conventional jQuery soup approach didn't cut it.

Should the web platform come up with a standards-based approach to solve the same problem, then this is not "competition", it is a blessing. It's not like React earns Facebook any revenue. Ideally, it wouldn't be needed or exist at all.