webpack.dev.js

const webpack = require('webpack');
const merge = require('webpack-merge');
const Dotenv = require('dotenv-webpack');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');

const common = require('./webpack.common.js');

module.exports = merge(common, {
    mode: 'development',
    devtool: 'inline-source-map',
    devServer: {
        contentBase: './src',
        historyApiFallback: true,
        compress: true,
        hot: true
    },
    module: {
        rules: [
            {
                test: /\.(css|scss)$/,
                use: [
                    'style-loader',
                    'css-loader',
                    'postcss-loader',
                    'sass-loader'
                ]
            },
        ]
    },
    plugins: [
        new webpack.HotModuleReplacementPlugin(),
        new MiniCssExtractPlugin({
            filename: '[name].css',
            chunkFilename: '[id].css',
        }),
        new Dotenv({
            path: './.env'
        })
    ]
});