@webpack-contrib/defaults/src/tasks/babel.js

Project configuration and boilerplate defaults for webpack projects

const { json } = require('mrm-core');

module.exports = (config) => {
  // .babelrc
  json('.babelrc')
    .merge({
      presets: [
        [
          'env',
          {
            useBuiltIns: true,
            // Target maintained to match minimum Webpack Nodejs version.
            targets: { node: config.maintLTS },
            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();
};