Function defaultLoadSync

lib/internal/modules/esm/load.js:136–171

* @param {URL['href']} url * @param {LoadContext} [context] * @returns {LoadReturn}

(url, context = kEmptyObject)

 * @returns {LoadReturn}
 */
function defaultLoadSync(url, context = kEmptyObject) {
  let responseURL = url;
  const { importAttributes } = context;
  let {
    format,
    source,
  } = context;

  const urlInstance = new URL(url);

  throwIfUnsupportedURLScheme(urlInstance, false);

  if (urlInstance.protocol === 'node:') {
    source = null;
    format ??= 'builtin';
  } else if (format === 'addon') {
    // Skip loading addon file content. It must be loaded with dlopen from file system.
    source = null;
  } else {
    if (source == null) {
      ({ responseURL, source } = getSourceSync(urlInstance, context));
      context = { __proto__: context, source };
    }

    // Now that we have the source for the module, run `defaultGetFormat` to detect its format.
    format ??= defaultGetFormat(urlInstance, context);
  }
  validateAttributes(url, format, importAttributes);

  return {
    __proto__: null,
    format,
    responseURL,
    source,
  };
}


/**