carbon-components-svelte/docs/webpack.config.js

const webpack = require("webpack");
const path = require("path");
const config = require("sapper/config/webpack.js");
const pkg = require("./package.json");

const mode = process.env.NODE_ENV;
const dev = mode === "development";

const alias = { svelte: path.resolve("node_modules", "svelte") };
const extensions = [".mjs", ".js", ".json", ".svelte", ".html"];
const mainFields = ["svelte", "module", "browser", "main"];

module.exports = {
  client: {
    entry: config.client.entry(),
    output: config.client.output(),
    resolve: { alias, extensions, mainFields },
    module: {
      rules: [
        {
          test: /\.(svelte|html)$/,
          use: {
            loader: "svelte-loader",
            options: { dev, hydratable: true, hotReload: false },
          },
        },
      ],
    },
    mode,
    plugins: [
      new webpack.DefinePlugin({
        "process.browser": true,
        "process.env.NODE_ENV": JSON.stringify(mode),
      }),
    ].filter(Boolean),
    devtool: dev && "inline-source-map",
  },

  server: {
    entry: config.server.entry(),
    output: config.server.output(),
    target: "node",
    resolve: { alias, extensions, mainFields },
    externals: Object.keys(pkg.dependencies).concat("encoding"),
    module: {
      rules: [
        {
          test: /\.(svelte|html)$/,
          use: {
            loader: "svelte-loader",
            options: { css: false, generate: "ssr", dev },
          },
        },
      ],
    },
    mode: process.env.NODE_ENV,
    performance: { hints: false },
  },
  serviceworker: {
    entry: config.serviceworker.entry(),
    output: config.serviceworker.output(),
    mode: process.env.NODE_ENV,
  },
};