Webpack bundle.js 해석

// a.js
let str = 'world'
module.exports = str

// index.js
let a = require('./a')
console.log('hello ' + a)

(function (modules) {
  var installedModules = {};
  function require(moduleId) {
    if (installedModules[moduleId]) return installedModules[moduleId].exports;
    var module = installedModules[moduleId] = {
      i: moduleId, l: false, exports: {}
    };
    modules[moduleId].call(module.exports, module, module.exports, require);
    module.l = true;
    return module.exports;
  }
  require.m = modules;
  require.c = installedModules;
  require.d = function (exports, name, getter) {
    if (!require.o(exports, name)) {
      Object.defineProperty(exports, name, { enumerable: true, get: getter });
    }
  };
  require.r = function (exports) {
    if (typeof Symbol !== 'undefined' && Symbol.toStringTag) {
      Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
    }
    Object.defineProperty(exports, '__esModule', { value: true });
  };

  require.t = function (value, mode) {
    if (mode & 1) value = require(value);
    if (mode & 8) return value;
    if ((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;
    var ns = Object.create(null);
    require.r(ns);
    Object.defineProperty(ns, 'default', { enumerable: true, value: value });
    if (mode & 2 && typeof value != 'string') for (var key in value) require.d(ns, key, function (key) { return value[key]; }.bind(null, key));
    return ns;
  };

  require.n = function (module) {
    var getter = module && module.__esModule ?
      function getDefault() { return module['default']; } :
      function getModuleExports() { return module; };
    require.d(getter, 'a', getter);
    return getter;
  };
  require.o = function (object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
  require.p = "";
  return require(require.s = "./src/index.js");
})
  ({
    "./src/a.js":
      (function (module, exports) {
        eval("let str = 'world'

module.exports = str

//# sourceURL=webpack:///./src/a.js?");
      }),
    "./src/index.js":
      (function (module, exports, require) {
        eval("let a = require(/*! ./a */ \"./src/a.js\")
console.log('hello ' + a)

//# sourceURL=webpack:///./src/index.js?");
      })
  });