babeljs.io

📑 install 3 @babel (+)

$ npm install --save-dev @babel/core @babel/node @babel/preset-env

📑 .babelrc

{
	"presets": ["@babel/preset-env"]
}

📑 npx babel-node

$ npx babel-node index.js

📑 .babelrc, babel.config.json

Babel has 2 parallel config file formats, which can be used together, or independently.

• Project-wide configuration

  • babel.config.json files, with the different extensions (.js, .cjs, .mjs)

• File-relative configuration

  • .babelrc files, with the different extensions (.babelrc, .js, .cjs, .mjs)
  • package.json files with a “babel” key
• monorepos: uses babel.config.json