ES6导入默认导出内

Question

I'm currently migrating the whole code of a NodeJS application from ES5 to ES6/7.

I'm having trouble when it comes to imports :

First, I understood that making an import directly call the file. For example :

 import moduleTest from './moduleTest'; 

This code will go into moduleTest.js and execute it.

So, the real question is about this code :

 import mongoose from 'mongoose'; import autopopulate from 'mongoose-autopopulate'; import dp from 'mongoose-deep-populate'; import { someUtils } from '../utils'; const types = mongoose.Schema.Types; const deepPopulate = dp(mongoose); export default () => { // DOES SOMETHING USING types AND deepPopulate return someThing; }; export const anotherModule = () => { // ALSO USE types and deepPopulate }; 

Is this a good practice to have types and deepPopulate declared outside of the two exports ? Or should I declare them in each export ?

The reason of this question is that I'm having a conflict due to this practice (to simplify, let's say that dp(mongoose) will call something that is not declared yet)

Answer 1

You can only have one 'default' export to a module, or you can have multiple 'named' exports per module. Take a look at the following for a good description of handling exports in ES6: ECMAScript 6 Modules: The Final Syntax