为什么webpack在使用转换运行时后将cmd模块识别为esm模块

Question

从“ xxx”导出*

使用transform-runtime之后，bundle.js为：

(function(module, __webpack_exports__, __webpack_require__) {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony import */ var babel_runtime_core_js_object_define_property__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! babel-runtime/core-js/object/define-property */ "./node_modules/babel-runtime/core-js/object/define-property.js");
/* harmony import */ var babel_runtime_core_js_object_define_property__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(babel_runtime_core_js_object_define_property__WEBPACK_IMPORTED_MODULE_0__);
/* harmony import */ var babel_runtime_core_js_object_keys__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! babel-runtime/core-js/object/keys */ "./node_modules/babel-runtime/core-js/object/keys.js");
/* harmony import */ var babel_runtime_core_js_object_keys__WEBPACK_IMPORTED_MODULE_1___default = /*#__PURE__*/__webpack_require__.n(babel_runtime_core_js_object_keys__WEBPACK_IMPORTED_MODULE_1__);

配置后：

["transform-runtime",{"polyfille:false"}]

bundle.js是：

(function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});

为什么Webpack在包装模块中执行不同的操作？

function(module, __webpack_exports__, __webpack_require__)
function(module, exports, __webpack_require__)