如何在Typescript中导出对象 [英] How to export object in Typescript

问题描述

我正在将现有的JavaScript项目转换为类型脚本。我不知道如何导出对象来获取这个javscript输出

I'm converting existing JavaScript project into type script. im not sure how to export object to get this javscript output

const path = require('path'),
      rootPath = path.normalize(__dirname + '/..'),
      env = process.env.NODE_ENV || 'development';

let config = {
  development: {
    amqpUrl: "amqp://localhost:15672",
    root: rootPath

  },
  test: {
    amqpUrl: "amqp://localhost:5672",
    root: rootPath

  },
  production: {
    amqpUrl: "amqp://localhost:5672",
    root: rootPath

  }
};
module.exports = config[env];

我写的打字稿如下，但不清楚导出

i wrote typescript as follow but not clear with exporting

import path = require("path")

    const rootPath = path.normalize(__dirname + '/..')
    const env = process.env.NODE_ENV || 'development'

    let config = {
      development: {
        amqpUrl: "amqp://localhost:15672",
        root: rootPath

      },
      test: {
        amqpUrl: "amqp://localhost:5672",
        root: rootPath

      },
      production: {
        amqpUrl: "amqp://localhost:5672",
        root: rootPath

      }
    };

   /* this is the line i'm having problem how can i export config object*/
    // export config[env];

当我导出时如何导出我试过的对象导出默认配置[env] 但它会从预期输出中产生一些差异

when i exporting how can i export just object i tried with export default config[env] but it generates something deference from expected output

推荐答案

在ES6中，您可以导出使用导出功能的名称，或者默认情况下您可以导出任何内容。
require 格式如下：

In ES6 you are allowed to export names using the export function, or for default you can export anything. The require format goes like this:

let config = require('config')

它需要默认导出配置文件。
在你的情况下，你应该这样做：

And it takes the default export of config file. In your case, you should do:

export default config[env]

如果你想使用导出，你可以这样做：

If you want to use the export, you would do something like:

let Environment = config[env];
export {Environment}

区别在于：

import EnvirmentNameWhatever from "./config"

到

import {Environment} from "./config"

• 注意 - 默认导出时，您可以使用任何您喜欢的名称，而在导出时，您必须使用导出的名称。



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