webpack.config.js

var webpack = require("webpack"),
    path = require("path"),
    fileSystem = require("fs"),
    env = require("./utils/env"),
    CopyWebpackPlugin = require("copy-webpack-plugin"),
    HtmlWebpackPlugin = require("html-webpack-plugin"),
    WriteFilePlugin = require("write-file-webpack-plugin");

const UglifyWebpackPlugin = require("uglifyjs-webpack-plugin");


// load the secrets
var alias = {};

var secretsPath = path.join(__dirname, ("secrets." + env.NODE_ENV + ".js"));

var fileExtensions = ["jpg", "jpeg", "png", "gif", "eot", "otf", "svg", "ttf", "woff", "woff2"];

if (fileSystem.existsSync(secretsPath)) {
    alias["secrets"] = secretsPath;
}

var options = {
    entry: {
        popup: path.join(__dirname, "src", "js", "popup.js"),
        options: path.join(__dirname, "src", "js", "options.js"),
        background: path.join(__dirname, "src", "js", "background.js"),
        content: path.join(__dirname, "src", "js", "content.js")
    },
    output: {
        path: path.join(__dirname, "build"),
        filename: "[name].bundle.js"
    },
    module: {
        rules: [
            {
                test: /\.css$/,
                loader: "style-loader!css-loader"
            },
            {
                test: new RegExp('\.(' + fileExtensions.join('|') + ')$'),
                loader: "url-loader?name=[name].[ext]"
            },
            {
                test: /\.html$/,
                loader: "html-loader",
                exclude: /node_modules/
            },
            {
                test: require.resolve('zepto'),
                loader: "imports-loader?this=>window"
            }
        ]
    },
    resolve: {
        alias: alias
    },
    plugins: [
        // expose and write the allowed env vars on the compiled bundle
        new webpack.DefinePlugin({
            "process.env.NODE_ENV": JSON.stringify(env.NODE_ENV)
        }),
        new CopyWebpackPlugin([{
            from: "src/manifest.json",
            transform: function (content, path) {
                // generates the manifest file using the package.json informations
                return Buffer.from(JSON.stringify({
                    description: process.env.npm_package_description,
                    version: process.env.npm_package_version,
                    ...JSON.parse(content.toString())
                }))
            }
        }]),
        new HtmlWebpackPlugin({
            template: path.join(__dirname, "src", "popup.html"),
            filename: "popup.html",
            chunks: ["popup"]
        }),
        new HtmlWebpackPlugin({
            template: path.join(__dirname, "src", "options.html"),
            filename: "options.html",
            chunks: ["options"]
        }),
        new HtmlWebpackPlugin({
            template: path.join(__dirname, "src", "background.html"),
            filename: "background.html",
            chunks: ["background"]
        }),
        new WriteFilePlugin()
    ],
    chromeExtensionBoilerplate: {
        notHotReload: ["content"]
    }
};

if (env.NODE_ENV === "production") {
    options.plugins.unshift(new UglifyWebpackPlugin({
        test: /\.js($|\?)/i
    }));
}

if (env.NODE_ENV === "development") {
    options.devtool = "cheap-module-eval-source-map";
} else {
    options.devtool = false;
}

module.exports = options;