nodejs 需要在对象文字中并使用它？

Question

using require like this below , can it cause any issues ?

module.exports = {
    _                   : require('lodash'),
    debug               : require('debug'),
    moment              : require('moment'),
    jwt                 : require('jsonwebtoken'),
    bcrypt              : require('bcrypt'),
    SwaggerExpress      : require('swagger-express-mw'),
    express             : require('express'),
    Sequelize           : require('sequelize'),
    SequelizeImport     : require('sequelize-auto-import'),
    twilio              : require('twilio'),
    DataTransform       : require("node-json-transform").DataTransform,
    joi                 : require('joi'),
    joiDateExtension    : require('joi-date-extensions'),
    joiPhoneExtension   : require('joi-phone-number-extensions'),
    requireAll          : require('require-all'),
    leftPad             : require('left-pad'),
    cors                : require('cors'),
    sendgrid            : require('@sendgrid/mail'),
    randomstring        : require('randomstring'),
    withPagination      : require('sequelize-cursor-pagination'),
    razorpay            : require('razorpay'),
    axios               : require('axios'),
    SlackNode           : require('slack-node'),
    emojiStrip          : require('emoji-strip'),
    firebase            : admin,
    apn                 : apn,
    apnProvider         : apnProvider
    // aws                 : AWS,
    // multer              : require('multer')
};

m assigning it to express instance and using it.

const moment        = App.packages.moment;
const firebase      = App.packages.firebase;
const _             = App.packages._;
const emojiStrip    = App.packages.emojiSt

Answer 1

This is formally uncorrect.

See Express docs:

var express = require('express')
var app = express()

app.get('/', function (req, res) {
  res.send('hello world')
})

app.listen(3000)

You can of course experiment different things but you need to know the risk. Always try to stick to common standards.

There is no problem in multiple requiring of packages in different files as they are just pulled from the node_modules folder, you are not creating multiple instances.

Answer 2

Any how module is loaded once. so I don't think it will cause an issue.