1. Babel configuration in App

  1. @babel/preset-env

    module.exports = {
  presets: [
    [
      "@babel/preset-env",
      {
        useBuiltIns: "usage",
        corejs: 3
      }    ]
  ]
}
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2. Babel configuration in Library

  1. @babel/plugin-transform-runtime

    module.exports = {
  plugins: [
    [
      "@babel/plugin-transform-runtime",
      {
        helper: true,
        regenerator: true,
        corejs: 3
      }
    ]
  ]
}
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3. Babel configuration in the test

  1. To be added

4. @babel/polyfill Depreciate

This library has been abandoned

5. Use of Babel API

Refer to the official documentation Tooling Packages

6. Reference

Babeljs. IO/docs/en/bab…