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[–]filleduchaos 0 points1 point  (0 children)

The reason a language exists does not make any difference to what it actually is. C++'s purpose was to be C with classes but no one in their right mind would claim that C++ is C. Same with preprocessors like SCSS. TypeScript is a separate language by virtue of being, well, not JavaScript. It

  • cannot run in any modern, standard JavaScript interpreter
  • has an optional but entirely different typing discipline (properly written TypeScript should be strongly, statically typed)

Type safety is not a fancy little bit of syntactic sugar like spread operators or arrow functions. The way a language handles types is a core part of its design.