uba-scripts/config/babel.dev.js

module.exports = {
	// Don't try to find .babelrc because we want to force this configuration.
	babelrc: false,
	// This is a feature of `babel-loader` for webpack (not Babel itself).
	// It enables caching results in OS temporary directory for faster rebuilds.
	cacheDirectory: true,
	presets: [
		// let, const, destructuring, classes, modules
		require.resolve('babel-preset-es2015')
		// exponentiation
		//require.resolve('babel-preset-es2016'),
		// JSX, Flow
		//require.resolve('babel-preset-react')
	],
	plugins: [
		// function x(a, b, c,) { }
		require.resolve('babel-plugin-syntax-trailing-function-commas'),
		// await fetch()
		require.resolve('babel-plugin-syntax-async-functions'),
		// class { handleClick = () => { } }
		require.resolve('babel-plugin-transform-class-properties'),
		// { ...todo, completed: true }
		require.resolve('babel-plugin-transform-object-rest-spread'),
		// function* () { yield 42; yield 43; }
		require.resolve('babel-plugin-transform-regenerator'),
		// Polyfills the runtime needed for async/await and generators
		[require.resolve('babel-plugin-transform-runtime'), {
			helpers: false,
			polyfill: false,
			regenerator: true
		}]
	]
};