babel-loader/lib/injectCaller.js

babel module loader for webpack

// @ts-check
/**
 * Inject babel-loader caller information into the Babel options.
 * @param {import("@babel/core").InputOptions} opts
 * @param {string} target
 * @returns {import("@babel/core").InputOptions}
 */
module.exports = function injectCaller(opts, target) {
  return {
    ...opts,
    caller: Object.assign({
      name: "babel-loader",
      // Provide plugins with insight into webpack target.
      // https://github.com/babel/babel-loader/issues/787
      target,
      // Webpack >= 2 supports ESM and dynamic import.
      supportsStaticESM: true,
      supportsDynamicImport: true,
      // Webpack 5 supports TLA behind a flag. We enable it by default
      // for Babel, and then webpack will throw an error if the experimental
      // flag isn't enabled.
      supportsTopLevelAwait: true
    }, opts.caller)
  };
};