PHPFixing
  • Privacy Policy
  • TOS
  • Ask Question
  • Contact Us
  • Home
  • PHP
  • Programming
  • SQL Injection
  • Web3.0

Sunday, November 27, 2022

[FIXED] How to deal with cyclic dependencies in Node.js

 November 27, 2022     circular-dependency, cyclic-dependency, module, node.js, require     No comments   

Issue

I've been working with nodejs lately and still getting to grips with the module system so apologies if this is an obvious question. I want code roughly like the following below:

a.js (the main file run with node)

var ClassB = require("./b");

var ClassA = function() {
    this.thing = new ClassB();
    this.property = 5;
}

var a = new ClassA();

module.exports = a;

b.js

var a = require("./a");

var ClassB = function() {
}

ClassB.prototype.doSomethingLater() {
    util.log(a.property);
}

module.exports = ClassB;

My problem seems to be that I can't access the instance of ClassA from within an instance of ClassB.

Is there a correct / better way to structure modules to achieve what I want? Is there a better way to share variables between modules?


Solution

While node.js does allow circular require dependencies, as you've found it can be pretty messy and you're probably better off restructuring your code to not need it. Maybe create a third class that uses the other two to accomplish what you need.



Answered By - JohnnyHK
Answer Checked By - Cary Denson (PHPFixing Admin)
  • Share This:  
  •  Facebook
  •  Twitter
  •  Stumble
  •  Digg
Newer Post Older Post Home

0 Comments:

Post a Comment

Note: Only a member of this blog may post a comment.

Total Pageviews

Featured Post

Why Learn PHP Programming

Why Learn PHP Programming A widely-used open source scripting language PHP is one of the most popular programming languages in the world. It...

Subscribe To

Posts
Atom
Posts
Comments
Atom
Comments

Copyright © PHPFixing