Well, there're things like React's JSX, CoffeeScript, TypeScript and all of the fricking Babel stuff, all require some kind of transpiling (or how babel names i

Well, there're things like React's JSX, CoffeeScript, TypeScript and all of the fricking Babel stuff, all require some kind of transpiling (or how babel names it, compiling), and probably that is what OP means. PS: Luckily, I'm not a frontend dev :)