You seem to be unaware of what TypeScript is. TypeScript is more of a high-powered linter than a new language. If you take Javascript and put it in TypeScript m

You seem to be unaware of what TypeScript is. TypeScript is more of a high-powered linter than a new language. If you take Javascript and put it in TypeScript mode, most errors are due to variable reuse (x was a number and now a string) or actually an error in the javascript if you're trying to be well typed. For a certain style of Javascript, making it Typescript is a no-op