webpack.config.popup.js

const path = require('path');
const HtmlPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');

module.exports = {
    name: 'popup',
    entry: ['./src/popup/index.js', './src/popup/scss/app.scss'],
    output: {
        path: path.resolve(__dirname, './build/popup'),
        filename: 'popup.js'
    },
    module: {
        rules: [
            {
                test: /\.vue$/,
                loader: 'vue-loader',
                options: {
                    loaders: {
                        scss: 'vue-style-loader!css-loader!sass-loader',
                        sass: 'vue-style-loader!css-loader!sass-loader?indentedSyntax'
                    }
                }
            },
            {
                test: /\.css$/,
                use: [
                    { loader: 'style-loader' },
                    { loader: 'css-loader' }
                ]
            },
            {
                test: /\.scss$/,
                use: ExtractTextPlugin.extract({
                    fallback: 'style-loader',
                    use: 'css-loader?!sass-loader'
                })
            },
            {
                test: /\.js$/,
                loader: 'babel-loader',
                exclude: /node_modules/
            },
            {
                test: /\.(eot|svg|ttf|woff|woff2)(\?\S*)?$/,
                loader: 'file-loader'
            },
            {
                test: /\.(png|jpg|gif|svg)$/,
                loader: 'file-loader',
                options: {
                    name: '[name].[ext]?[hash]'
                }
            }
        ]
    },
    plugins: [
        new HtmlPlugin({
            template: './src/popup/index.html',
            filename: 'popup.html'
        }),
        new ExtractTextPlugin('popup.css')
    ]
};