导入模块moment-lunar无法正常运行

Question

如果您在下面编写JavaScript代码，则会收到错误消息。

import moment from "moment";
import "moment-lunar";

错误

moment-lunar.js:97 Uncaught TypeError: Cannot read property 'fn' of undefined
  at Object.<anonymous> (moment-lunar.js:97)
  at Object../node_modules/moment-lunar/moment-lunar.js (moment-lunar.js:181)
  at __webpack_require__ (bootstrap:78)

moment-lunar.js 97行代码如下。

moment.fn.solar = function (isLeanMonth) {      <--- This is 97 line
    isLeanMonth = isLeanMonth === true;
    var days = lunarMonthday[this.year() - lunarMonthday[0]];
    var leap = getBitInt(days, 4, 13);
    var offset = 0;
    var loopend = leap;
    ......
}

问题是否可以使矩变量对“弯月”模块中的模块可用？