node.js require 找不到自定义模块

Question

Here is the project structure:

/
  app.js
  package.json
  /node_modules
  /app
    config.json
    /frontend
      assets and html tpls
    /modules
      couch.js
      raeume.js
      users.js

I require config.json, raeume.js and users.js from app.js and it all works fine.

var config   = require('./app/config');
var raeume   = require('./app/modules/raeume');
var users    = require('./app/modules/users');

Then I require config.json and couch.js from user.js the same way and it won't find anything.

var couch     = require('./app/modules/couch');
var config    = require('./app/config');

I guess it should find it. After some research I saw a diverse landscape of problems inclusive how node is compiled. Thus included: I work on osx 10.8 with node v0.10.7.

Answer 1

The path is relative to the directory in which you are require ing the files, so it should be something like:

var couch = require('./couch');
var config = require('../config');

A bit of clarification, if you write

var couch = require('./couch');

you are trying to require the couch module which resides in the current directory, if you write

var couch = require('couch');

you are trying to require the couch module installed via npm .

Answer 2

这是你如何做到的：

var users    = require('./../modules/users');

Answer 3

It must be:

var config = require(../../app/config)

var couch = require(./couch) (same directory)

Answer 4

The current accepted answer is correct and properly answers the question.

Although not directly related to the original question, I'd like to add another point here for all those people who got the Cannot find module error for local files although the correct relative path was specified.

Assuming a file with the name couch.js exists in the current directory,

• On case insensitive filesystems (like NTFS on Windows), both these lines will work -

   var couch = require('./couch'); var couch = require('./Couch');

• However, on a case-sensitive filesystem (like ext4 on Linux), require('./couch') will work but require('./Couch') will not.

There is a page in the NodeJS docs regarding this.

I hope this helps someone whose perfectly working code stopped working after moving from Windows/Mac to Linux. 😅

Answer 5

Also double check the extension on the file being imported. I accidentally used .ts in a JavaScript project, and this prevented it from being found. Once I changed the extension to .js , require was able to find it fine.