什么是“只能使用'esModuleInterop'标志默认导入"?意思是? [英] What does "can only be default-imported using the 'esModuleInterop' flag" mean?

问题描述

我遇到以下错误:

lib/app.ts:1:8 - error TS1259: Module '"mongoose-sequence"' can only be default-imported using the 'esModuleInterop' flag

在以下代码行上:

import _ from 'mongoose-sequence';

现在，我很高兴地承认我在整个下划线作为函数名"中缺少了某些东西，但是该错误没有任何意义，因为esModuleInterop标志是绝对设置为true的绝对值.在我的ts.config文件中.

Now, I'm happy to admit I'm missing something with the whole "underscore as a function name" thing, but the error makes no sense, as the esModuleInterop flag is absolutely, positively set to true in my ts.config file.

我正在尝试导入此文件:

I am trying to import this:

declare module 'mongoose-sequence' {
  import mongoose = require('mongoose');
  var _: (schema: mongoose.Schema, options?: Object) => void;
  export = _;

来自猫鼬序列的DefinitelyTyped定义.

from the mongoose-sequence DefinitelyTyped definition.

我想念什么?

推荐答案

尝试使用:import _ = require('mongoose-sequence');

https://www.typescriptlang .org/docs/handbook/modules.html#export--和导入--require

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