electron/lib/common/api/exports/electron.js

'use strict';

const moduleList = require('@electron/internal/common/api/module-list');

exports.handleESModule = (loader) => () => {
  const value = loader();
  if (value.__esModule && value.default) return value.default;
  return value;
};

exports.memoizedGetter = (getter) => {
  /*
   * It's ok to leak this value as it would be leaked by the global
   * node module cache anyway at `Module._cache`.  This memoization
   * is dramatically faster than relying on nodes module cache however
   */
  let memoizedValue = null;

  return () => {
    if (memoizedValue === null) {
      memoizedValue = getter();
    }
    return memoizedValue;
  };
};

// Attaches properties to |targetExports|.
exports.defineProperties = function (targetExports) {
  const descriptors = {};
  for (const module of moduleList) {
    descriptors[module.name] = {
      enumerable: !module.private,
      get: exports.handleESModule(module.loader)
    };
  }
  return Object.defineProperties(targetExports, descriptors);
};