Compilers and transpilers are the same. The term "optimizing compiler" exists, which probably mean that some are non-optimizing. TypeScript is a great example o

Compilers and transpilers are the same. The term "optimizing compiler" exists, which probably mean that some are non-optimizing. TypeScript is a great example of that (although it does optimize a few things depending on the target). Babel can be used as a macro system for JS, and macros are compilers.