scripts-build-library.js

const rewire = require("rewire");
const path = require("path");
const defaults = rewire("react-scripts/scripts/build.js");
const config = defaults.__get__("config");

config.optimization.runtimeChunk = false;
config.output.filename = "excalidraw.js";
config.output.libraryTarget = "umd";
config.output.library = "Excalidraw";
config.output.path = path.join(__dirname, "../dist");
config.entry = "./src/export";
config.externals = ["react", "react-dom"];
config.resolve.extensions = [".js", ".ts", ".tsx", ".scss", ".mjs"];
config.module.rules.push(
  {
    test: /\.css/,
    use: [
      "style-loader",
      {
        loader: "css-loader",
        options: { url: false },
      },
    ],
  },
  {
    test: /\.scss/,
    use: [
      "style-loader",
      {
        loader: "sass-loader",
        options: { url: false },
      },
    ],
  },
);
config.plugins = [];