webpack.config.js

const HtmlInlineScriptWebpackPlugin = require("html-inline-script-webpack-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const path = require("path");

module.exports = (env, argv) => ({
    mode: argv.mode === "production" ? "production" : "development",

    // This is necessary because Figma's 'eval' works differently than normal eval
    devtool: argv.mode === "production" ? false : "inline-source-map",

    entry: {
        ui: "./src/ui.tsx", // The entry point for your UI code
        code: "./src/code.ts" // The entry point for your plugin code
    },

    module: {
        rules: [
            // Converts TypeScript code to JavaScript
            { test: /\.tsx?$/, use: "ts-loader", exclude: /node_modules/ },

            // Enables including CSS by doing "import './file.css'" in your TypeScript code
            {
                test: /\.css$/,
                use: ["style-loader", "css-loader"]
            },

            // Allows you to use "<%= require('./file.svg') %>" in your HTML code to get a data URI
            {
                test: /\.(png|jpg|gif|webp|svg|zip)$/,
                use: ["url-loader"]
            }
        ]
    },

    // Webpack tries these extensions for you if you omit the extension like "import './file'"
    resolve: { extensions: [".tsx", ".ts", ".jsx", ".js"] },

    output: {
        filename: "[name].js",
        path: path.resolve(__dirname, "dist") // Compile into a folder called "dist"
    },

    // Tells Webpack to generate "ui.html" and to inline "ui.ts" into it
    plugins: [
        new HtmlWebpackPlugin({
            template: "./src/ui.html",
            filename: "ui.html",
            inlineSource: ".(js)$",
            chunks: ["ui"]
        }),
        new HtmlInlineScriptWebpackPlugin()
    ]
});