This error appeared after I added the react-hot
loader in an array following this tutorial: https://thoughtbot.com/blog/setting-up-webpack-for-react-and-hot-module-
My Solution:
loaders: [{
test: /\.(js|jsx)$/,
loaders: ['react-hot', 'babel?' + JSON.stringify({
cacheDirectory: true,
plugins: [
'transform-runtime',
'transform-decorators-legacy'
],
presets: ['es2015', 'react', 'stage-0'],
env: {
production: {
presets: ['react-optimize']
}
}
}), 'eslint'],
include: src,
exclude: /node_modules/
}