webpack.config.js

const { CleanWebpackPlugin } = require('clean-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')

const isDevServer = process.argv[1].indexOf('webpack-dev-server') >= 0
const config = {
    mode: 'development',
    entry: __dirname + '/demo/main.js',
    output: {
        filename: '[hash].js',
        path: __dirname + '/docs/',
    },
    module: {
        rules: [
            {
                test: /\.css$/,
                loader: 'style-loader!css-loader',
            },
            {
                test: /\.(png|svg|jpg|gif)$/,
                loader: 'file-loader',
            },
            {
                test: /\.html$/,
                loader: 'html-loader',
            },
        ],
    },
    plugins: [
        new HtmlWebpackPlugin({
            template: __dirname + '/demo/index.html',
        }),
    ],
    devServer: {
        open: true,
        port: 8028,
    },
}

if (!isDevServer) {
    config.plugins.push(new CleanWebpackPlugin())
}

module.exports = config