babel-preset-evergreen

babel-preset-evergreen

This preset can transform:

• ECMAScript 2020 syntax
• Class static properties
• Decorators

Installation

npm install babel-preset-evergreen --save-dev

Usage

// example: babel.config.json
{
  "presets": [
    [
      "evergreen",
      {
        "polyfill": "usage",
        "targets": { "browsers": ... }
      }
    ]
  ]
}

Options

polyfill

• type: [ false, 'usage', 'pure' ]
• default: false

How babel handles polyfills. pure is an experimental option.

References: https://github.com/babel/babel/issues/10008

Install core-js@3 as a top-level dependency when specifying 'usage' or 'pure'.

npm install core-js@3 --save