You can't write React without Javascript. Even the most basic React demos require you to write JS, if only to increment a counter. Perhaps they don't really "k

You can't write React without Javascript. Even the most basic React demos require you to write JS, if only to increment a counter. Perhaps they don't really "know" the entire monstrosity of Javascript, but that's a tall order. JS is such a big language, with so many redundant features, that most developers will use only a fraction of it.