webpack.config.js

/* eslint-disable no-undef */

const devCerts = require("office-addin-dev-certs");
const CopyWebpackPlugin = require("copy-webpack-plugin");
const CustomFunctionsMetadataPlugin = require("custom-functions-metadata-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const ProvidePlugin = require("webpack").ProvidePlugin;

const urlDev = "https://localhost:3000/";
const urlProd = process.env.PRODUCTION_URL;

/* global require, module, process, __dirname */

async function getHttpsOptions() {
  const httpsOptions = await devCerts.getHttpsServerOptions();
  return { cacert: httpsOptions.ca, key: httpsOptions.key, cert: httpsOptions.cert };
}

module.exports = async (env, options) => {
  const dev = options.mode === "development";

  if (!dev && !urlProd) {
    throw new Error('Please set "PRODUCTION_URL" environment variable');
  }

  const config = {
    devtool: "source-map",
    entry: {
      polyfill: ["core-js/stable", "regenerator-runtime/runtime"],
      functions: "./src/functions/functions.js",
      taskpane: "./src/taskpane/taskpane.js",
      commands: "./src/commands/commands.js",
    },
    output: {
      devtoolModuleFilenameTemplate: "webpack:///[resource-path]?[loaders]",
      clean: true,
    },
    resolve: {
      extensions: [".ts", ".tsx", ".html", ".js"],
      fallback: {
        stream: require.resolve("stream-browserify"),
        buffer: require.resolve("buffer/"),
        crypto: require.resolve("crypto-browserify"),
        querystring: require.resolve("querystring-es3"),
      },
    },
    module: {
      rules: [
        {
          test: /\.js$/,
          exclude: /node_modules/,
          use: {
            loader: "babel-loader",
            options: {
              presets: ["@babel/preset-env"],
            },
          },
        },
        {
          test: /\.html$/,
          exclude: /node_modules/,
          use: "html-loader",
        },
        {
          test: /\.(png|jpg|jpeg|gif|ico)$/,
          exclude: /node_modules/,
          type: "asset/resource",
          generator: {
            filename: "assets/[name][ext][query]",
          },
        },
      ],
    },
    plugins: [
      new ProvidePlugin({
        // you must `npm install buffer` to use this.
        Buffer: ["buffer", "Buffer"],
      }),
      new CustomFunctionsMetadataPlugin({
        output: "functions.json",
        input: "./src/functions/functions.js",
      }),
      new HtmlWebpackPlugin({
        filename: "functions.html",
        template: "./src/functions/functions.html",
        chunks: ["polyfill", "functions"],
      }),
      new HtmlWebpackPlugin({
        filename: "taskpane.html",
        template: "./src/taskpane/taskpane.html",
        chunks: ["polyfill", "taskpane"],
      }),
      new CopyWebpackPlugin({
        patterns: [
          {
            from: "netlify.toml",
            to: "netlify.toml",
          },
          {
            from: "assets/*",
            to: "assets/[name][ext][query]",
          },
          {
            from: "manifest*.xml",
            to: "[name]" + "[ext]",
            transform(content) {
              if (dev) {
                return content;
              } else {
                return content.toString().replace(new RegExp(urlDev, "g"), urlProd);
              }
            },
          },
        ],
      }),
      new HtmlWebpackPlugin({
        filename: "commands.html",
        template: "./src/commands/commands.html",
        chunks: ["polyfill", "commands"],
      }),
    ],
    devServer: {
      static: [__dirname],
      headers: {
        "Access-Control-Allow-Origin": "*",
      },
      https: env.WEBPACK_BUILD || options.https !== undefined ? options.https : await getHttpsOptions(),
      port: process.env.npm_package_config_dev_server_port || 3000,
    },
  };

  return config;
};