import babelLoader from "babel-loader";
import { ConfigItem } from "@babel/core";

export default babelLoader.custom(() => {
  // Extract the custom options in the custom plugin
  function myPlugin() {
    return {
      visitor: {},
    };
  }

  return {
    // Passed the loader options.
    // customOptions({ opt1, opt2, ...loader }) {
    //   return {
    //     // Pull out any custom options that the loader might have.
    //     custom: { opt1, opt2 },
    //
    //     // Pass the options back with the two custom options removed.
    //     loader,
    //   };
    // },

    // Passed Babel's 'PartialConfig' object.
    config(cfg: ConfigItem) {
      return {
        ...cfg.options,
        plugins: [
          ...((cfg.options && cfg.options["plugins"]) || []),
          [myPlugin],
        ],
      };
    },

    // result(result) {
    //   return {
    //     ...result,
    //     code: result.code + "\n// Generated by some custom loader",
    //   };
    // },
  };
});