Summary
ref Babel is a toolchain that is mainly used to convert ECMAScript 2015+ code into a backwards compatible version of JavaScript in current and older browsers or environments. Here are the main things Babel can do for you:
Transform syntax Polyfill features that are missing in your target environment (through a third-party polyfill such as core-js) Source code transformations (codemods) And more! (check out these videos for inspiration)