webpack-defaults/dist/tasks/babel.js

'use strict';

var _require = require('mrm-core'),
    json = _require.json;

module.exports = function (config) {
  // .babelrc
  json('.babelrc').merge({
    presets: [['env', {
      useBuiltIns: true,
      // Target maintained to match minimum Webpack Nodejs version.
      targets: { node: config.minNode },
      exclude: ['transform-async-to-generator', 'transform-regenerator']
    }]],
    plugins: [['transform-object-rest-spread', { useBuiltIns: true }]],
    env: {
      test: {
        // Transformation of es2015 modules are needed for Jest.
        presets: ['env'],
        plugins: ['transform-object-rest-spread']
      }
    }
  }).save();
};