This package allows you to transpile ES2015 source using buble. See Buble project website to check out supported features.
npm i -S buble-loader bubleAdd something like this to your webpack.config.js
module: {
rules: [
{
test: /\.js$/,
loader: 'buble-loader',
include: path.join(__dirname, 'src'),
options: {
objectAssign: 'Object.assign'
}
}
]
}