Modern JavaScript environments will also implement the by ECMA-402 specification, which provides the Intl object

Sucrase is an alternative to Babel that allows super-fast development builds. Instead of compiling a large range of JS features to be able to work in Internet Explorer, Sucrase assumes that you're developing with a recent browser or recent Node.js version, so it focuses on compiling non-standard language extensions: JSX, TypeScript, and Flow.

Super-fast alternative to Babel for when you can target modern JS runtimes

Avoid transpilers like Babel and Bublé (and if you're using TypeScript, target a modern version of JavaScript)