babel-preset-target v0.0.5

babel-preset-target

Babel preset that allows for target environments to be specified along with plugins and presets. If all environments have native support for a given plugin, it will be skipped.

Install

$ npm install --save-dev babel-preset-target

Usage

Via .babelrc (Recommended)

.babelrc

{
  "presets": [
    ["target", {
      "presets": ["es2015"],
      "targets": [
        {"name": "chrome", "version": 52}
      ]
    }]
  ]
}

Via Node API

require("babel-core").transform("code", {
  presets: [
    ["target", {
      presets: ["es2015"],
      targets: [
        {name: "chrome", version: 52}
      ]
    }]
  ]
});

Options

• presets - Allows for specific office presets to be defined. Only plugins within the preset that are necessary will be included.
  • Can be array of any of ["es2015", "es2016", "es2017"]
  • Currently doesn't support es2015 options
• plugins - Array of any plugins to be conditionally added

• targets - Array of enviroment targets. If all targets support a given plugin then the plugin will be skipped.

  • Each target looks like: {name: 'chrome', version: 52}
  • If no targets are defined, all plugins are included.

Supported targets

Example Options

{
  presets: [
    ["target", {
      presets: ["es2015"],
      targets: [
        {name: "chrome", version: 52}
      ]
    }]
  ]
}
{
  presets: [
    ["target", {
      plugins: ["transform-es2015-arrow-functions"],
      targets: [
        {name: "node", version: 6}
      ]
    }]
  ]
}